STIHL Cut-off Machine Instruction Safety Manual
Contents
1. Readjust idle speed fReadustidiespeed TT TE panel Secrest Pf fe Spark plug Replace after 100 hours operation after 100 hours operation All accessible screws nuts and bolts a Retighten adjusting screws Cut off Machine Safety Manual 23 English The following maintenance intervals apply in normal operating conditions The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions extensive dust etc at the end of work and or Whenever tank is refilled if not functioning properly aaa i O O 72 O u 0 Q X test check Antivibration elements Have them replaced by a specialist 7 dealer Abrasive wheel a Supports rubber buffers underneath the test check ae ae we U E F Waming labels D O F E 1 STIHL recommends STIHL specialist dealers m m H e H 2 present only in some countries 24 Cut off Machine Safety Manual Main Parts Cut off Machine Safety Manual Z lt oO o xt a O NX m CONDO RP WNDN English Rear Handle Throttle Trigger Lockout Throttle Trigger Slide Control Starter Grip Carburetor Adjusting Screws Fuel Filler Cap Water Attachment Tensioning Nut Adjusting Lever Abrasive Wheel Front Thrust Washer Guard Muffler Spark Arresting Screen Front Handle Decompression Valve Cap for Spark Plug Boot Choke Lever Manual F2. note the differ not rated ent cutting layers in different materials 1 STIHL recommends that a STIHL servicing dealer be consulted Cut off Machine Safety Manual 21 English Undercut 180BA013 KN Undercutting is a wearing away of the steel core at or just below the diamond segments When cutting road surfaces do not cut through into the more abrasive ballast gravel crushed rock below as indicated by a light colored dust This can cause excessive undercutting resulting in wheel breakage and or thrown segments A warnine Immediately replace a diamond wheel if the core has been severely undercut Built up edges dressing Z X e lt cao O o Built up edges are identified by a pale grey deposit on the top of the diamond segments that clogs and blunts the segments 22 Built up edges can form when cutting extremely hard material such as granite as a result of incorrect handling such as applying excessive feed force Built up edges increase vibrations reduce cutting performance and cause sparking Diamond cutting wheels must be dressed at the first sign of built up edges For this purpose briefly cut a more abrasive material such as sandstone aerated concrete or asphalt Wet cutting helps to prevent the formation of built up edges Z x wo es lt x a O ice If you continue to use a cutting wheel with blunt segments the s
3. of diamond cutting wheels Ensure that the cutting wheel is generously supplied with water Wet cutting helps to suppress dust The water binds the dust The cutting wheel must be supplied with at least 20 fl oz 0 6 liters water per minute Wet cutting can reduce the energy of reactive forces In a pinch situation the water can act as a lubricant 15 English Composite resin wheels can be used for dry cutting of metals or for wet or dry cutting of concrete stone or masonry Composite resin wheels designed for dry cutting Special procedures must be followed when wet cutting with a composite non diamond wheel designed for dry cutting See the section entitled Wet Cutting with Abrasive Wheels in the safety precautions of this manual Wet cutting is generally not suitable for cutting metals Composite resin wheels designed for wet cutting Adjust water flow rate during cutting so it is suf ficient to bind all the dust that occurs at least 20 fl oz 0 6 L min If the water flow rate is too high the cutting wheel may skim on the water surface in the cut and greatly reduce cutting performance To avoid this do not exceed a water flow rate of about 135 fl oz 4 L min 16 Use water properly 1 Be certain water is applied to both sides of wheel since uneven distribution can cause one sided wear with possible wheel breakage 2 Make certain water does not flow on wheel that is not runn
4. of the cut off machine Some diamond abrasive wheels that are not STIHL branded utilize poor quality steel cores are not properly tensioned or have other design or manufacturing defects As a result they may begin to wobble during use which can cause wheel breakage Such wobbling can also lead to a severe binding of the wheel in the kerf that under certain circumstances can then result in serious or fatal injury from reactive forces See the section entitled Reactive Forces including Kickback Never use a wheel that wobbles or that has ever wobbled Even though such a wheel may temporarily cease to wobble e g if run without load it will always be prone to wobble again under certain conditions Replace it immediately before further use Composite abrasive wheels are heat sensitive Always store your cut off machine in a place where a composite wheel is not exposed to direct sunlight or other sources of heat Store spare composite wheels flat on a level surface in a dry place where there is no risk of frost damage Failure to follow these directions may cause the wheel to shatter or crack in use Causing serious or fatal injury Ar warninc Never use circular saw blades carbide tipped blades rescue blades wood cutting blades or toothed blades of any nature They can cause severe personal injury from blade contact thrown objects and or reactive forces including kickback See section on Reactive Forces
5. of the parts of the cut off machine see the chapter Main Parts A warnine Never modify a cut off machine in any way Only STIHL branded parts and cutting attachments expressly approved by STIHL for use with the specific STIHL cut off machine models are recommended Although certain other parts or attachments may be useable with the STIHL powerhead their use may in fact be extremely dangerous Abrasive Wheels A warninc Before mounting the cutting wheel make sure that the maximum operating wheel speed is above or equal to the spindle speed of your cut off machine as provided in the specifications of this manual A wheel that is not so rated may shatter or break and poses a threat of serious or fatal injury to the operator and other nearby persons Abrasive wheels for free hand cutting are subjected to particularly high bending and compression stresses A warnine Wheels that are not STIHL branded may be more likely to shatter or break or create other hazards such as increased reactive forces Use only wheels with approved RPM ratings Read and follow any addional safety precautions that accompany the wheel Awarninc Inspect the abrasive wheel frequently and replace immediately if the abrasive wheel is cracked or warped Cracked or warped wheels may shatter or break and cause serious or fatal personal injury Out of round or unbal anced abrasive wheels increase vibration and reduce the service life
6. support of the workpiece See below Severe binding of the wheel can be prevented by proper cutting techniques e g not sideloading the wheel and by the use of properly designed manufactured and maintained wheels 11 English Reducing the Risk of Kickback Injury 002BA582 ST A warning To reduce the risk of kickback injury avoid cutting with the upper quadrant of the wheel where possible Be especially cautious for a pinching or binding of the wheel in this area which can cause severe reactive forces in a rotational kickback motion Z X o t lt m N Avoid wedge action The severed part must not bind the abrasive wheel 12 Be alert to potential movement of the workpiece or anything else that could cause the cut to close and pinch the wheel In order to reduce the risk of pinching support the workpiece in such a way that the cut remains open during the cutting process and when the cut is finished see illustration Never make a cut that results in a binding of the wheel If you cannot properly support the workpiece do not use a cutting off machine to make the cut select another tool or cutting technique that is not subject to kickback Where there is a possibility of a pinch you can leave an uncut part that prevents the kerf from closing and pinching the wheel which can later be broken manually If you are making a complete cut make sure that the final separating cut is made at th
7. Ai warnine Do not use a cut off machine with incorrect idle speed adjustment The rotating wheel may cause injury If you cannot obtain the correct setting have your STIHL dealer check your cut off machine and make proper adjustments or repairs Working Conditions Operate the cut off machine under good visibility and daylight conditions only Wearing of hearing protection reduces sound perception Be alert not to miss voice signals from co workers Keep within calling distance to other persons who may assist in case of emergency Ai warninc As soon as the engine is running this product gen erates toxic exhaust fumes containing chemi cals such as unburned hydrocarbons including benzene and carbon monoxide that are known to cause respira tory problems cancer birth defects or other reproductive harm Some of the gases e g carbon monoxide may be color less and odorless To reduce the risk of serious or fatal injury illness from inhaling toxic fumes never run the machine indoors or in poorly venti lated locations Ensure proper ventilation when working in trenches or other confined areas warnine Use of this product to cut masonry concrete metal and other materials can generate dust and fumes containing chemicals known to cause serious or fatal injury or illness such as respiratory disease cancer birth defects or other reproductive harm If you are unfamiliar with the risks associated wit
8. STIHL Cut off Machine Safety Manual Be arsine Read Instruction Manual thoroughly before use and follow all safety precautions improper use can cause serious or fatal injury Contents Safety Precautions and Working Techniques Sample applications Cutting wheels Composite resin cutting wheels Diamond cutting wheels Maintenance and Care Main Parts Original Instruction Manual Printing inks contain vegetable oils paper can be recycled Printed on chlorine free paper ANDREAS STIHL AG amp Co KG 2014 0457 186 3021 VA1 C14 0000000552_003_GB STIHL Cut off Machine Safety Manual 15 19 19 20 23 25 English This manual contains the safety precautions and recommended cutting techniques outlined in STIHL instruction manuals for gasoline powered cut off machines Even if you are an experienced cut off machine user it is in your own interest to familiarize yourself with the latest instructions and safety precautions regarding your cut off machine Please note that the illustrations in the chapter Main Parts of the Machine in this manual show the cut off machine STIHL Cutquik TS 420 Other cut off machine models may have different parts and controls You should therefore always refer to the instruction manual of your particular cut off machine model Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in thi
9. Your STIHL dealer stocks a range of special abrasive wheels for the many applications of the cut off machine Cut off Machine Safety Manual Aiwarnine Use of the wrong abrasive wheel or the cutting of material for which the wheel was not designed may cause the wheel to wobble shatter or increase reactive forces Causing serious or fatal injury See below and section Reactive Forces Only use the abrasive wheel approved for the type of material to be cut There are different types of abrasive wheels each specially marked With respect to STIHL composite wheels for example 1 Stone Also can be used for concrete masonry reinforced concrete and brick cutting 2 Steel Can be used for all ferrous metal cutting 3 Asphalt Also can be used for aggregate concrete cutting 4 Ductile iron Also can be used for certain grades of cast iron SG 17 24 bronze and copper cutting For cutting composite materials please ask your STIHL dealer Diamond Abrasive Wheels Diamond abrasive wheels have a much better cutting performance than composite abrasive wheels The diamond wheels are steel centered and diamond particles are imbedded in their cutting edges Cut off Machine Safety Manual They can be used for concrete asphalt natural stone clay pipe brick and the like STIHL also offers diamond wheels for cutting ductile iron and some structural steel They are not however suitable for cutting all me
10. d or maintained or not completely or securely assembled Check machine that it is ready for proper operation Keep the handles dry clean and free of oil and fuel A warninc Before operation of your cut off machine be sure the controls e g throttle trigger throttle trigger lockout stop switch and the safety devices are working properly the carburetor idle and maximum speed are correctly adjusted the wheel is properly mounted and the wheel guard is in place and securely fastened to your unit All wheels should be carefully inspected for good condition before mounting Cut off Machine Safety Manual Adjust the wheel guard so that sparks dust and cut material are deflected away from the operator and cannot reach flam mable surroundings See section Operating Instructions of your instruction manual A warninc Check that the spark plug boot is securely mounted on the spark plug a loose boot may cause arcing that could ignite combustible fumes and cause a fire Proper tensioning of the ribbed V belt is important In order to avoid an incorrect setting the tensioning procedure must be followed as described in your manual Always make sure the hexagonal collar nuts for the cast arm are tightened securely Check ribbed belt tension after one hour of operation and correct if necessary English Starting Z x co LO O lt co N warnine Your cut off machine is a one perso
11. d precisely to the respective intended use as well as the engine performance of the cut off machine Transport and storage Do not expose cutting wheels to direct sunshine or other thermal stresses during transport and storage Avoid jolting and impacts Stack cutting wheels flat on a level surface in the original packaging in a dry place where the temperature is as constant as possible Do not store cutting wheels in the vicinity of aggressive fluids Store cutting wheels in a frost free place English Composite resin cutting wheels Z x Q lt m O Types for dry applications for wet applications Economic benefit is improved and premature wear can be avoided by choosing and using the correct composite resin cutting wheel The short name e g asphalt concrete onthe label and onthe packaging table with recommended uses can help to ensure the correct choice STIHL composite resin cutting wheels are Suitable depending on the version for cutting the following materials Asphalt Concrete Stone Ductile cast pipes Steel STIHL composite resin cutting wheels cannot be used to cut railway tracks Do not cut any other materials risk of accident 19 English Diamond cutting wheels For wet applications Economic benefit is improved and premature wear can be avoided by choosing and u
12. d spinning of the cut off wheel These forces result in opposition to directional change e g when the operator attempts to move the machine in a sideways direction Maintenance Repair and Storing of the Cut Off Machine Maintenance replacement or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual However if you make a warranty claim for a component that has not been serviced or maintained properly or if nonapproved replacement parts were used STIHL may deny warranty coverage Never operate a cut off machine that is damaged improperly adjusted or not completely or securely assembled Follow the maintenance and repair instructions in the appropriate sections of your instruction manual A warnine Use only STIHL replacement parts for maintenance and repair Use of parts manufactured by others may cause serious or fatal injury Ai warnine Always stop the machine and make sure that the wheel is stopped before doing any maintenance or repair work or cleaning the cut off machine Do not attempt any maintenance or repair work not described in your instruction manual Have such work performed only at your STIHL servicing dealer Clean off grinding dust after finishing work Tighten all nuts bolts and screws except the carburetor adjustment screws after each use Do not clean your machine with a pressure washer The solid jet of water may dama
13. e crystalline silica from bricks and cement and other masonry products Your risk from these exposures varies depending on how often you do this type of work To reduce your exposure to these chemicals work in a well ventilated area and work with approved safety equipment such as those dust masks that are specially designed to filter out microscopic particles 0457 186 3021 englisch USA 0457 186 3021
14. e top of the workpiece with the bottom of the wheel In this way if there is any residual pinching it will be at the bottom of the wheel where it may result in pull away but not in kickback Be alert for pull away Objects to be cut must therefore be properly supported and must be secured against rolling away slipping or vibrations lt Z x ise fas oO lt m N Support an exposed pipe in a trench so that it is stable and capable of bearing weight If the ends of the pipe are firmly in the ground the ground may act as a support where the pipe emerges into the open Additional support will be needed closer to the cut however to prevent sagging see illustration Be alert for pipe that is under stress that may cause it to shift when cut pipe in the ground may be under stress because of uneven surfaces Make sure any section of pipe to be removed is also properly supported and will not shift After the first cut you may need to move the supports or add additional support for the second cut so that both sides of that cut are fully supported including the section to be removed That section can also be supported by means of a strap from above e g suspended from a backhoe It must be evenly supported and properly tensioned however so that the section remains in its position and does not tend to go up or down as a whole or on one side when separated Always pay attention in subgrade subsurface wo
15. e vapor pressure may build up inside the fuel tank depending on the fuel used the weather conditions and the tank venting system In order to reduce the risk of burns and other personal injury from escaping gas vapor and fumes remove the fuel filler cap on your power tool carefully so as to allow any pressure build up in the tank to release slowly Never remove the fuel filler cap while the engine is running Select bare ground for fueling and move at least 10 feet 3 m from the fueling spot before starting the engine Wipe off any spilled fuel before starting your machine A warnine Check for fuel leakage while refueling and during operation If fuel leakage is found do not start or run the engine until the leak is fixed and any spilled fuel has been wiped away Take care not to get fuel on your clothing If this happens change your clothing immediately Ai warninc If fuel gets spilled on clothes especially trousers it is very important to change clothes immediately Do not rely upon evaporation Flammable quantities of fuel may remain on clothes after a spill for longer than expected Cutting metal with a cut off machine when clothes are wet or damp from gasoline is extremely dangerous as the operator s clothes might catch fire and cause serious or fatal injury Aiwarnine An improperly tightened fuel cap can loosen or come off and spill quantities of fuel Different cut off machines may be equipped wi
16. egments may soften as a result of excessive heat built up The wheel core will also overheat and lose its mechanical strength This can lead to considerable stress as clearly indicated by stress cracks and or a wobbling movement of the cutting wheel warnine Such cutting wheels may break apart or throw off segments during use or lead to significant reactive forces causing serious or fatal injury Replace them immediately Cut off Machine Safety Manual English Maintenance and Care The following maintenance intervals apply in normal operating conditions The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions extensive dust etc at the end of work and or Whenever tank is refilled if not functioning properly before starting work x lt Visual inspection condition leaks Le Complete machine em ooo f Operating controls Check operation Px force ooo Manual fuel pump if fitted 4 Fuel pick up body in fuel tank C Have repaired by a specialist dealer o X emren P XT Ribbed V belt E ee E E Air filter all filter e Only if there is a noticeable loss of oa cs power Cylinder fins O O om cleaned by a specialist dealer 1 Spark arresting screen in muffler Seana ee test check Water attachment Have them maintained by a specialist dealer Check idle adjustment abrasive Carburetor wheel must not rotate
17. ersonal injury from fire may result Replace damaged or badly worn brackets immediately Grip Never use the cut off machine with one hand Always hold the cut off machine firmly with both hands when the engine is running Place your left hand on front handle bar and your right hand on rear handle and throttle trigger Left handed users should follow this instruction too Wrap your fingers tightly around the handles keeping the handles cradled between your thumbs and forefingers Make sure your cut off machine handles and grip are in good condition and free of moisture pitch oil fuel mix or grease Never touch a rotating wheel with your hand or any part of your body English warnine Clear the area where you are working Avoid stumbling on obstacles and watch out for holes or ditches Be extremely cautious when working on slopes or uneven ground Take extreme care in wet and freezing weather rain snow ice A winne Never operate the cut off machine with the starting throttle lock engaged as this does not permit proper control of the speed of the unit and may lead to serious injury A warnine Sparks from cutting metal can burn or cause cloth ing to catch fire Always direct sparks away from the operator or any flam mable surroundings Never cut metal while standing on a flammable surface such as wood or tar paper Where there is a risk of fire have appro priate fire extinguishing equipme
18. es the risk of injury from blade contact thrown tips and reactive forces including kickback 8 Begin cutting and continue at full throttle 9 Do not overreach 10 Never sideload a wheel in the kerf 11 Use your cut off machine for cutting only It is not designed for prying or shoveling away any objects 12 Be especially alert for reactive forces including kickback when cutting with the front and upper quadrant of the wheel Never pull the top of the wheel guard back beyond the limit stop 13 Be alert to shifting of the workpiece or anything that could cause the cut to close and pinch the wheel especially in the upper quadrant Support the workpiece in such a way that the cut remains open Never make a cut that results in a binding of the wheel 14 14 Use wet cutting whenever feasible In a pinch situation the water can act as a lubricant and reduce the energy of reactive forces 15 Release the pressure on the cut off machine as you reach the end of the cut Too much pressure may cause the operator to lose control of the cut off machine when the abrasive wheel completes the cut The abrasive wheel may contact the operator or strike some foreign object and shatter 16 Use extreme caution when reentering a cut and do not turn the wheel at an angle or push the wheel into the cut as this may result in a binding of the wheel Gyroscopic Forces Be alert for gyroscopic forces that are caused by the rapi
19. feel and regulate temperature produce numbness and burning sensations and Cause nerve and circulation damage and tissue necrosis All factors which contribute to whitefinger disease are not known but cold weather smoking and diseases or physical conditions that affect blood vessels and blood transport as well as high vibration levels and long periods of exposure to vibration are mentioned as factors in the development of whitefinger disease In order to reduce the risk of whitefinger disease and carpal tunnel syndrome please note the following Cut off Machine Safety Manual STIHL cut off machines are equipped with an anti vibration AV system designed to reduce the transmission of vibrations created by the machine to the operator s hands An AV system is recommended for those persons using cut off machines on a regular or sustained basis Wear gloves and keep your hands warm Keep the AV system well maintained A cut off machine with loose components or with damaged or worn AV elements will tend to have higher vibration levels Maintain a firm grip at all times but do not squeeze the handles with constant excessive pressure Take frequent breaks All the above mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome Therefore continual and regular users should monitor closely the condition of their hands and fingers If any of the above sympt
20. ff machine must be in the proper position Grip the front handle and place the muffler at the side away from the body with the cutting attachment to the rear Arwarnine Always protect the cutting wheel from hitting the ground or any other objects Damaged wheels may shatter and cause serious or fatal injury By vehicle Properly secure your cut off machine to prevent turnover fuel spillage and damage to the cut off machine Never transport with cutting wheel mounted A wheel damaged during transportation may shatter during operation and cause serious personal injury Fuel Your STIHL power tool uses an oil gasoline mixture for fuel see the chapter on Fuel of your instruction manual English warnine Gasoline is an extremely flammable fuel If spilled and ignited by a spark or other ignition source it can cause fire and seri ous burn injury or property damage Use extreme caution when handling gasoline or fuel mix Do not smoke or bring any fire or flame near the fuel or the power tool Note that combusti ble fuel vapor may escape from the fuel system Awarnine Dust may collect on the powerhead especially around the carburetor and may absorb gasoline resulting in a risk of fire Clean dust from the powerhead regularly Fueling Instructions A warning Fuel your power tool in well ventilated areas outdoors Always shut off the engine and allow it to cool before refueling Gasolin
21. fire Front Handle Handlebar for the left hand of the power tool Decompression Valve Releases compression pressure to make engine starting easier when activated Cap for Spark Plug Boot The spark plug boot connects the spark plug with the ignition lead Choke Lever Eases engine starting by enriching mixture Manual Fuel Pump Provides additional fuel feed for a cold start Filter Cover Covers and protects the air filter element Clutch Couples engine to the belt pulley when engine is accelerated beyond idle speed Not illustrated Belt Pulley The wheel that drives the ribbed belt and the abrasive wheel Not illustrated Anti Vibration System The anti vibration system includes a number of anti vibration elements designed to reduce the transmission of vibrations created by the engine and cutting process to the operator s hands Not illustrated Cut off Machine Safety Manual English Cut off Machine Safety Manual 27 English 28 Cut off Machine Safety Manual A WARNING The engine exhaust from this product contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm A WARNING some dust created by power grinding and other construction activities contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm Some examples of these chemicals are e lead from lead based paints and
22. ge parts of the machine A warnine Never test the ignition system with spark plug boot removed from spark plug or with an unseated spark plug since uncontained sparking may cause a fire Aiwarnine To reduce the risk of fire and burn injury use only spark plugs authorized by STIHL Always press spark plug boot Cut off Machine Safety Manual snugly onto spark plug terminal of the proper size Note If terminal has a detachable SAE adapter nut it must be attached A loose connection between spark plug terminal and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire Keep spark plug clean and make sure ignition lead is in good condition A warnine Do not operate your cut off machine if the muffler is damaged missing or modified An improperly maintained muffler will increase the risk of fire and hearing loss Never touch a hot muffler or spill fuel or other flammable liquid over it Burn injuries or fire will result If your muffler was equipped with a spark arresting screen to reduce the risk of fire e g in the USA Canada and Australia never operate your cut off machine if the screen is missing or damaged In California it is a violation of 4442 or 4443 of the Public Resources Code to use or operate gasoline powered tools on forest covered brush covered or grass covered land unless the engine s exhaust system is equipped with a complying spa
23. h the particular material being cut review the material safety data sheet and or consult your employer the material manufacturer supplier governmental agencies such as OSHA and NIOSH and other sources on hazardous materials California and some other authorities for instance have published lists of substances known to cause cancer reproductive toxicity etc Control dust and fumes at the source where possible In this regard use good work practices and follow the recommendations of the manufacturer supplier OSHA NIOSH and occupational and trade associations A water attachment kit is provided with your cut off machine and should be used to reduce dust whenever wet cutting is feasible For dust suppression purposes the flow rate should be at least 0 6 liters 20 fl oz of water per minute If wet cutting at the recommended flow rate is not utilized the operator and any bystanders should always wear a respirator approved by NIOSH MSHA for the material being cut See the section on Respiratory Protection in the chapter Sample Applications in the instruction manual Even if wet cutting at the recommended flow rate an operator who is actively cutting for more than two hours in one day should wear at least a NIOSH approved disposable respirator Consult and follow any federal state or local laws or regulations with respect to dry and wet cutting warnine Cutting masonry concrete and other materials with silica
24. he point of contact or of pinching binding If the wheel is slowed solely by frictional contact with a solid object such as the workpiece the resulting reactive forces are normally moderate and readily controllable by an operator who is holding the machine properly If however the wheel is abruptly slowed or stopped by a pinch or severe bind the reactive forces may be substantially greater The greater the force generated the more difficult it will be for the operator to control the cut off machine Loss of control can result in severe personal injury or death English Pull away Climbing Pinching and Rotational Kickback Forces The most common reactive forces are pull away and climbing If the contact is at the bottom of the wheel a cut off machine will try to pull away from the operator pull away If the contact is at the front of the wheel the wheel may attempt to climb the object being cut climbing Pinching occurs when the piece being cut closes on the wheel A severe binding may also occur if the wheel is substantially sideloaded in the kerf or if an improper or damaged diamond wheel begins or ceases to wobble in the kerf If the wheel is severely pinched or bound in the upper quadrant the wheel may be instantly thrown up and back towards the operator with great force in a rotational kickback motion Such kickback situations can and should always be avoided Pinching of the wheel can be prevented by proper
25. in their composition may give off dust containing crystalline silica Silica is a basic component of Cut off Machine Safety Manual sand quartz brick clay granite and numerous other minerals and rocks Repeated and or substantial inhalation of airborne crystalline silica can cause serious or fatal respiratory diseases including silicosis In addition California and some other authorities have listed respirable crystalline silica as a substance known to cause cancer When cutting such materials always follow the respiratory precautions mentioned above Ai warnine Breathing asbestos dust is dangerous and can cause severe or fatal injury respiratory illness or cancer The use and disposal of asbestos containing products have been strictly regulated by OSHA and the Environmental Protection Agency Do not use your cut off machine to cut or disturb asbestos asbestos containing products or products such as pipes which are wrapped or covered with asbestos insulation If you have any reason to believe that you might be cutting asbestos immediately contact your employer or a local OSHA representative Cut off Machine Safety Manual Ai warnine Your STIHL cut off machine is designed for hand held use or operation on a cut off machine cart Cutting with your cut off machine resting on the ground or other surface can cause excessive wear to the bracket designed to protect the bottom of the tank housing Loss of fuel and p
26. ing since the wheel will absorb water and that will affect wheel balance 3 After finishing work run the cutting wheel at normal operating speed for about 3 to 6 seconds without water so that the remaining water is flung off Respiratory protection Aiwarninc When wet cutting at the recommended flow rate is not utilized the operator and any bystanders should always wear a respirator approved by NIOSH MSHA for the material being cut Even if wet cutting an operator who is actively cutting for more than two hours a day should wear at least a NIOSH approved disposable respirator Points to be noted with diamond and composite cutting wheels Object to be cut Must be fully supported Must be secured so that it cannot roll or slip away Must be protected against vibration The cutting sequence The cutting sequence is important when cutting openings and recesses etc The last cut must always be made in such a way that the cutting wheel cannot become bound and so that the user is not at risk of being injured by the part that has been cut off or out If applicable leave small ridges of uncut material to hold the severed part in position These ridges can subsequently be broken through A number of points must be decided before the part is finally severed How heavy is the part In which direction can it move after being severed Is it under tension Helpers must not be put at risk of
27. injury when the part is broken off or out Cutting in several passes 180BA017 KN Mark cutting line A Cut off Machine Safety Manual 180BA027 AM Work along the cutting line If corrections are necessary always reposition the cutting wheel taking care to ensure that it is not wedged The cutting depth per pass should not exceed 5 to 6 cm 2 to 2 1 2 Thicker material must be cut in several passes Cutting slabs Secure the slab e g on a non slip surface sandbed Z x co i lt m O Cuta guiding groove A along the marked line Cut off Machine Safety Manual Cut deeper into the parting cut B Leave a ridge C of uncut material Cut through the slab at the ends so the material does not chip Then break the slab 180BA020 KN Curves must be cut in several straight passes taking care to ensure that the cutting wheel does not become wedged Cutting pipes round and hollow bodies Secure pipes round and hollow bodies against vibrations slipping and rolling away Note direction of fall and weight of the severed part Determine and mark the cutting line avoid metal reinforcement to the extent possible especially in the direction of the severing cut English Determine sequence of severing cuts Grind a guide groove along the line marked Make cuts deeper along the guide groove observe recommended cutting depth on each pas
28. n tool Do not allow other persons to be near a running cut off machine Start and operate your cut off machine without assistance For specific starting instructions see the appropriate section of your instruction manual Do not drop start This method is very dangerous because you may lose control of the cut off machine Place the cut off machine on firm ground or other solid surface in an open area Maintain good balance and secure footing Be absolutely sure that the cutting wheel is clear of you and all other obstructions and objects including the ground When the engine starts at starting throttle engine speed will be fast enough for the clutch to engage the belt pulley and turn English the wheel Never attempt to start the cut off machine when the abrasive wheel is in a cut Once the engine has started immediately blip the throttle trigger which should release the starting throttle lock and allow the engine to slow down to idle A warning When you pull the starter grip do not wrap the starter rope around your hand Do not allow the grip to snap back but guide the starter rope slowly back to permit the rope to rewind properly Failure to follow this procedure may result in injuries to hand or fingers and may damage the starter mechanism Important Adjustments At correct idle speed the wheel should not turn For directions to adjust idle speed see the appropriate section of your instruction manual
29. nd in good condition and that no pieces have broken off See sections on Abrasive Wheels and Reactive Forces in this manual Check the wheel guard for cracks If you discover any breaks or cracks fit a new guard before further use Awaanine It is essential to determine the exact direction of the cut before applying the abrasive wheel to the work Wheels are constructed for radial pressure only Lateral pressure must be avoided Hold the cut off machine steady To reduce the risk of serious or fatal injury do not change the direction of the cut during the cut as this may produce a high torsional load on the abrasive wheel and may cause it to bind break or shatter A binding of the wheel can also result in reactive forces See section on Reactive Forces A warning Do not use abrasive wheels for rough grinding Large bending stresses occur during such work which may cause abrasive wheels to shatter or break and result in serious or fatal injury A warnine To reduce the risk of injury from shattered abrasive wheels 1 Do not exceed the maximum operating speed marked on the wheel 2 Donot use a wheel that has been dropped 3 Test each new wheel immediately after installation for approximately one minute at maximum speed without cutting making sure to keep bystanders away 4 Donotcut any material for which the abrasive wheel is not authorized 5 Do not grind on the side of the abrasive wheel 6 D
30. not designed to provide protection against English all dangers presented by circular saw blades carbide tipped blades rescue blades or wood cutting or toothed blades of any nature A warnine To reduce the risk of injury from loss of control from reactive forces including kickback 1 Hold the cut off machine firmly with both hands 2 Maintain good balance and footing at all times Never cut while standing on a ladder 3 Position the cut off machine in such a way that your body is clear of the cutting attachment Avoid standing in direct line with the wheel See illustration Never bend over the cutting attachment especially when the guard is pulled back towards the top and there is a risk of reactive forces Ensure sufficient freedom of movement especially in trenches Make sure there is sufficient space for the user and the fall of the severed part 4 Do not cut above shoulder height 13 English 5 Only STIHL branded diamond and composite abrasive wheels are recommended The use of non STIHL branded wheels can be extremely dangerous Never work with a diamond wheel that wobbles or that has ever wobbled or that is manufactured with abrasive material on its sides 6 Do not cut wood or any other material for which the abrasive wheel is not authorized 7 Never use circular saw blades carbide tipped blades rescue blades wood cutting blades or toothed blades of any nature Their use increas
31. nt readily available Awarnine To reduce the risk of injury from fire do not cut into any pipe drum or other container without first ensuring that it does not contain a volatile or flammable substance y eT English Aiwarnine When cutting into existing walls floors or similar structures be alert for hidden hazards such as electrical cables water and gas pipes and flammable substances Make sure that power water and gas have been shut off and pipes drained before starting to cut Operating Instructions A warnine The wheel guard is adjustable It is extremely important that the wheel guard is in place and set to suit the type of work and your stance The guard should always be adjusted so that the user is not endangered by particles of the material being cut sparks or pieces of damaged wheels either directly or by ricochet Failure to follow this instruction could result in serious or fatal injury Ai warnine Your cut off machine is equipped with a wheel guard limit stop that restricts the positioning of the wheel guard To reduce the risk of injury from wheel contact and or reactive forces and to avoid damaging the guarding system never attempt to pull the adjusting lever past the limit stop 10 Awarninc Always check the wheel before use and after unintentionally striking any object frequently check it during use when it is stopped Look for cracks and make sure that it is undamaged a
32. o not twist thrust knock or drop the machine This can cause damage to the wheel To achieve a clean and efficient cut pull the abrasive wheel across the work or move it to and fro in the cutting direction Do not use force to push the abrasive wheel into the work Insert the wheel into the material only as deep as necessary to make the cut To reduce the amount of dust created do not cut all the way through stone and concrete materials leave a thin piece uncut For most such materials this piece can be easily broken afterwards Do not cock jam or wedge the wheel in the cut Always stop the engine and be sure the wheel has stopped rotating before setting down the cut off machine If a cut off machine cart is used sweep debris from the path of the wheels as debris under one of the cart s wheels may cause flexing of the abrasive wheel This could result in high frictional forces and thus greatly reduce the engine Cut off Machine Safety Manual power available for the actual cutting work It could also damage the abrasive wheel STIHL recommends the use of the cart for longer cuts in a straight line Wet Cutting with Abrasive Wheels Before wet cutting make sure water will not damage the floor or building A warning To reduce the risk of electrocution to you or bystanders do not allow water or sludge to contact live electric wires A warnine To reduce the risk of injury from wheel breakage when we
33. of control and or Cut off Machine Safety Manual kickback If the wheel you are using begins to wobble or has ever wobbled discard it immediately Although such a wheel may temporarily cease to wobble e g if run without load it will always be prone to wobble again under certain conditions warning Some other non STIHL branded diamond wheels are manufactured with abrasive material on their sides Do not use such wheels since the abrasive material may lead to substantially increased reactive forces in a pinch or sideloading situation warnine Never use chipped abrasive wheels or circular saw blades carbide tipped blades rescue blades or wood cutting or toothed blades of any nature on a cut off machine The use of such wheels or blades will greatly increase the risk of loss of control and severe personal injury or death from reactive forces since the chipped section of an abrasive wheel or the teeth of a saw blade may catch in the material being cut and generate substantially greater reactive forces including rotational kickback Cut off machines are designed for use with abrasive wheels in good condition only Machines designed for use with wood cutting or other toothed blades use different types of guarding systems that provide the protection necessary for those types of blades Machines such as a cut off machine that are designed for use with abrasive wheels require a different guarding system which is
34. oms appear seek medical advice immediately A warnine The ignition system of your unit produces an electromagnetic field of a very low intensity This field may interfere with some pacemakers To reduce the risk of serious or fatal injury persons with a pacemaker should consult their physician and the pacemaker manufacturer before operating this tool Cut off Machine Safety Manual Proper Clothing A warnine To reduce the risk of injury the operator should wear proper protective apparel Clothing must be sturdy and snug fitting but allow complete freedom of movement Avoid loose fitting jackets scarfs neckties jewelry flared or cuffed pants uncon fined long hair or anything that could become caught on any obstacles or moving parts of the unit Wear overalls or long pants to protect your legs Do not wear shorts Ai warnine When cutting metal a cut off machine generates sparks that can ignite clothing Most fabrics used in clothing are flammable even flame retardant fabrics will ignite at higher temperatures To reduce the risk of burn injury STIHL recommends wearing clothing made of leather wool flame retardant treated cotton or a tightly woven heavier cotton such as denim Some flame retardant synthetic fabrics are also suitable but others such as polyester nylon rayon and acetate can melt during a fire into a tar like matter that burns into the skin Check the clothing manufacturer s instr
35. or wooden objects Misuse may result in personal injury or property damage including damage to the machine A warning Minors should never be allowed to use a cut off machine Bystanders especially children and animals should not be allowed in the area where a cut off machine is in use Never let the cut off machine run unattended Different models may have different parts and controls See the appropriate section of your instruction manual for a description of the controls and function of the parts of your model cut off machine Safe use of a cut off machine involves 1 the operator 2 the power tool 3 the use of the power tool THE OPERATOR Physical Condition You must be in good physical condition and mental health and not under the influence of any substance drugs alcohol etc which might impair vision dexterity or judgment Do not operate a cut off machine when you are fatigued Be alert if you get tired while operating your cut off machine take a break tiredness may result in loss of control Working with any cut off machine can be strenuous If you have any condition that might be aggravated by strenuous work check with your doctor before operating a cut off machine Ai warnine Prolonged use of cut off machines or other machines exposing the operator to vibrations may produce whitefinger disease Raynaud s phenomenon or carpal tunnel syndrome These conditions reduce the hand s ability to
36. rk areas supporting material can crumble or slide away Cut off Machine Safety Manual A warnine Be particularly alert when cutting a workpiece such as a pipe with a belled end or cutting out a section of pipe ina trench that if not properly supported can sag or drop upon completion of the cut creating a pinch not where you are actually cutting but rather at or near the top of the workpiece If the pinch is in the Upper quadrant of the abrasive wheel kickback can result A warning Use wet cutting whenever feasible since the water can act as a lubricant in a pinch situation and thus reduce the likelinood of reactive forces occurring and the energy of any such forces that do occur making it easier to maintain control of the machine warnine Only STIHL branded cutting attachments are recommended Use of certain non STIHL branded wheels may be extremely dangerous Many substandard diamond wheels for instance are available in the market If they are not manufactured with the proper quality steel in their core if they are not properly tensioned or if other design or manufacturing defects exist they may e g begin to wobble during use lose segments or exhibit other operational problems that can substantially increase the risk of personal injury or death If a diamond wheel begins or ceases to wobble within the kerf the change in the behavior of the wheel may cause a severe binding that can lead to loss
37. rk arrester that is maintained in effective working order The owner operator of this product is responsible for properly maintaining the spark arrester Other states or governmental entities agencies such as the U S Forest Service may have similar requirements Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements Cut off Machine Safety Manual For any maintenance please refer to the maintenance chart and to the warranty statement near the end of the instruction manual Store wheels on a flat surface in a dry place preferably at a constant temperature where there is not a risk of frost Do not store a cut off machine with a wheel mounted on the machine Store cut off machine in a high or locked place away from children Empty the fuel tank before storing for longer than a few days Store fuel only in correctly labeled and approved containers Avoid direct skin contact and do not inhale the gas vapors English Sample applications Water connection A water attachment kit is mounted on the machine for use with all types of water supply A pressurized 2 6 gallons 10 liter water tank is available from STIHL for wet cutting A water tank for mounting on the Cutquik cart is also available for wet cutting Most diamond cutting wheels are suitable for wet cutting Wet cut whenever feasible It increases the service life and cutting speed
38. s For small corrections of direction do not tilt the abrasive wheel but always position it anew instead If necessary leave small ridges that hold the part that is to be separated in position Break these ridges manually after the last cut Cutting concrete pipe NY Nvvavw The procedure is dependent on the outer diameter of the pipe and the maximum possible cutting depth of the abrasive wheel A Secure pipe against vibrations slipping and rolling away Note weight tension and direction of fall of the part to be severed 17 English 002BA528 AM Determine and mark direction of cut Determine sequence of cuts Outer diameter of pipe is smaller than the maximum cutting depth O VO Make one cut from the top to the bottom Outer diameter of pipe is greater than the maximum cutting depth Plan first then cut Several cuts are needed correct sequence is important Turn guard to rear stop 18 Always start at the bottom use the front and upper part of the abrasive wheel for cutting 23 Use the front and upper part of the abrasive wheel for cutting the opposite lower side Make sure that the cut at the bottom is complete 002BA561 AM Next make a first lateral cut on the top half of the pipe connecting with the kerf from the bottom half A second lateral cut is then made in the marked area To keep the pipe from pinching during this cut never cu
39. s manual English Safety Precautions and Working Techniques The use of any cut off machine may be hazard ous Because a cut off machine is a high speed fast cutting power tool special safety precau tions must be observed to reduce the risk of per sonal injury and fire It is important that you read fully understand and observe the following safety precautions and warnings Read the instruction manual and the safety precautions periodically A warning Careless or improper use of any cut off machine may cause serious or fatal injury Have your STIHL dealer show you how to operate your cut off machine Observe all applicable national state and local safety regulations standards and ordinances Awarnine Your cut off machine is for professional use only Do not lend or rent your cut off machine without the instruction manual NO Be sure that anyone using it understands the information contained in this manual A first time operator should obtain practical instruction before using the machine Employers should establish a training program for operators of gasoline powered hand held portable cut off machines to assure safe operation of these machines and proper choice of cutting attachments These safety precautions and warnings apply to the use of all current STIHL Cutquiks A warnine Use your cut off machine only for authorized uses For instance it is not suitable for cutting wood
40. sing the correct diamond cutting wheel The short name see following explanation onthe label and onthe packaging table with recommended uses can help to ensure the correct choice STIHL diamond cutting wheels are suitable depending on the version for cutting the following materials Asphalt Concrete Stone hard rock Abrasive concrete Green concrete Clay bricks Clay pipes Ductile iron Structural steel up to 10 mm thick 20 Do not cut any other materials Cut off machines are not suitable for cutting certain metals and other substances Never use diamond abrasive wheels with abrasive material on their sides since in a pinch situation they can result in extreme kickback Risk of Severe or fatal injury Short names z 4700 1 00m s 4700r reverse sid 711 ers min p m 0 795 086978 de Voir au vi o 180BA010 KN The short name is a combination of letters and numerals with up to four digits The letters indicate the main area of use for the cutting wheel The numerals indicate the performance class of the STIHL diamond cutting wheel Letter Main area of use A Asphalt B Concrete BA Concrete Asphalt S Stone rock SB Rock Concrete can be used for structural steel up to 10 mm thick and ductile iron not suitable for continuous cutting of such materials Radial and axial run out A correctl
41. t cutting with any composite wheel 1 Make certain water does not flow on a wheel that is not running since the wheel will absorb water which will affect wheel balance 2 Be certain water is applied to both sides of wheel since uneven distribution can cause one sided wear 3 After finishing work run the cutting wheel at normal operating speed for about 3 to 6 seconds without water so that the remaining water is flung off Ai warnine To reduce the risk of injury from wheel breakage when wet cutting with a composite wheel that is not specifically designed for wet cutting never store and Cut off Machine Safety Manual reuse such a wheel that has been used with water Use these wheels up the same day Reactive Forces including Kickback warnine Reactive forces may occur at any time the cut ting wheel on a cut off machine is rotating N AR The powerful force used to cut through a workpiece can be reversed and work against the operator If the wheel is slowed or stopped by frictional contact with any solid object or by a pinch or binding reactive forces can occur instantly and may result in the operator losing control of the cut off machine which in turn may result in serious or fatal injury An understanding of the causes of these reactive forces may help you avoid loss of control Reactive forces are exerted in a direction opposite to the direction in which the wheel is moving at t
42. t into the area of the final cut Only make the final top cut once all bottom and lateral cuts have been completed and connect with one another Always make the final separating cut from the top approx 15 of the pipe circumference If the workpiece is properly supported it should not pinch when the cut is completed If there is any residual pinching however it will be at the bottom of the wheel where it may result in pull away but not in kickback Be alert for pull away Concrete pipe cut recess Sequence of cuts 1 to 4 is important First cut hard to reach areas Cut off Machine Safety Manual Always make severing cuts so that the abrasive wheel is not pinched Use wedges and or leave ridges that are broken after cutting Ifthe severed part remains in the recess after cutting due to wedges ridges used do not make any further cuts break the severed part Cut off Machine Safety Manual Cutting wheels Cutting wheels are exposed to extremely high loads especially during hand held cutting Only use abrasive whhels that comply with ANSI B 7 1 for hand held machines and are correspondingly labeled Note that the maximum permissible speed of the cutting wheel must be higher than the maximum spindle speed listed on the wheel guard label The cutting wheels that have been developed for STIHL by well known manufacturers of abrasive wheels are of high quality and tailore
43. tals and other materials Wet or dry cutting is possible Water attachments are included with your STIHL cut off machine See the appropriate section of your instruction manual A warning Do not remount a used diamond abrasive wheel without first inspecting for under cutting flatness core fatigue segment damage or loss signs of overheating discoloration and possible arbor hole damage See the chapter Diamond Cutting Wheels Check the wheel for cracks and make sure that no pieces have broken off the wheel before use Always fit the wheel so that the arrow on the wheel points in the direction of the rotation of the spindle THE USE OF THE POWER TOOL Transporting the STIHL Cutquik Ai warninic To reduce the risk of injury from unintended activation and or contact with a moving wheel always stop the engine before putting a cut off machine down or carrying it The abrasive wheel continues to rotate coast down for a short while after the throttle trigger is English released flywheel effect Bring the wheel to a stop by lightly contacting the bottom of the wheel with a hard surface or wait until the wheel comes to a complete stop on its own Carrying a cut off machine with the engine running is extremely dangerous Accidental acceleration of the engine can cause the wheel to rotate Avoid touching the hot muffler By hand When carrying your cut off machine by hand the engine must be stopped and the cut o
44. th different fuel filler caps Bayonet Fuel Filler Cap Never use a tool to open or close the bayonet fuel filler cap as this could damage the cap and cause fuel to leak out The bayonet fuel filler cap must be securely closed after refuelling Fuel Filler Cap with Screw Thread Tighten the fuel filler cap f as securely as possible ANO after refuelling This reduces the risk of the cap working loose due to engine vibrations and fuel leaking out A warnine Never attempt to force the cap open by using a tool It may damage the cap and allow fuel to leak A warnine Before use make sure that the fuel cap has been completely and properly tightened and any spilled fuel wiped away Check for fuel leakage while Cut off Machine Safety Manual refueling and during operation If a fuel leak is suspected do not start or run the engine until the leak is fixed and spilled fuel has been wiped away Before Starting For wheel installation follow the procedure described in the appropriate sections of your instruction manual Ai warninc Check fuel system for leaks especially the visible parts e g filler cap hose connections manual fuel pump only for power tools equipped with a manual fuel pump Do not start the engine if there are leaks or damage risk of fire Have the machine repaired by a servicing dealer before using it A warnine Never operate a cut off machine if it is damaged improperly adjuste
45. uctions Keep clothing free of oil fuel grease and other flammable substances English Always wear heavy duty work gloves e g made of leather or other wear resistant material when handling the cutt off machine Heavy duty nonslip gloves improve your grip and help to pro tect your hands Good footing is important in cut off machine work Wear sturdy boots with nonslip soles Steel toed safety boots are recommended A warning Loose objects may be thrown toward the operator by the cutting tool To reduce the risk of injury to your eyes never operate a cut off machine unless wearing goggles or properly fitted safety glasses with adequate top and side protection complying with ANSI Z 87 1 Proper eye protection is a must Wear an approved safety hard hat to protect your head Cut off machine noise may damage your hearing Always wear sound barriers ear plugs or ear mufflers to help protect your hearing Regular users should have their hearing checked regularly English warnine ik When wet cutting at the recommended flow rate is not utilized the opera E tor should always wear a 4 respirator approved by NIOSH MSHA for the material being cut to reduce the risk of serious or fatal respiratory illness For additional details and warnings on this subject see information under Working Conditions in this instruction manual THE POWER TOOL For illustrations and definitions
46. uel Pump Filter Cover Serial Number Warning Label Warning Label Warning Label Warning Label Warning Label Depending on Model 25 English Definitions 10 11 26 Rear Handle The support handle for the right hand Throttle Trigger Lockout Must be depressed before the throttle trigger can be activated Throttle Trigger Controls the speed of the engine Slide Control For starting throttle run and stop Keeps the throttle partially open during starting and switches off the ignition to stop the engine Starter Grip The grip of the pull starter for starting the engine Carburetor Adjusting Screws For tuning the carburetor Fuel Filler Cap For closing the fuel tank Water Attachment For connection of water supply for wet cutting Tensioning Nut For tensioning the ribbed belt Adjusting Lever To adjust the wheel guard in a way that sparks dust cutting debris or wheel fragments are directed away from the operator Abrasive Wheel Can either be a composite abrasive wheel or a diamond abrasive wheel 12 13 14 15 16 17 18 19 20 21 Front Thrust Washer Distributes clamping pressure of mounting nut evenly over cutting wheel Guard Guards the wheel and deflects sparks dust cutting debris or wheel fragments Muffler Reduces engine exhaust noises and diverts exhaust gases away from operator Spark Arresting Screen Designed to reduce the risk of
47. y mounted spindle bearing on the cut off machine is essential for a long service life and efficient operation of the diamond cutting wheel Using a cutting wheel on a cut off machine with defective spindle bearing can lead to axial and radial run out Z xX fo lt ian O o Excessive radial run out A causes individual diamond segments to be overloaded and to overheat This can in turn lead to stress cracking in the wheel core or to softening of individual segments Axial run out or spindle wobble B results in higher thermal stress and wider cuts Cut off Machine Safety Manual English Troubleshooting Cutting wheel Frayed edges or tears cut wanders out Radial or axial run out Consult a dealer of line increased wear at the sides of the segments Cutting wheel wobbles Use a new cutting wheel Frayed edges cut wanders out of line lit Cutting wheel is blunt built up edges on cut Dress the cutting wheel for stone by tle or no cutting performance sparking ting wheels for stone briefly cutting in abrasive material use a new cutting wheel for cutting asphalt Poor cutting performance high level of Cutting wheel rotates in the wrong direction Mount the cutting wheel with correct segment wear direction of rotation Chipping or cracking in the wheel core Overload Replace immediately with a new cutting and segments wheel Undercuiting Cutting in a material for which the wheel is Use a new cutting wheel
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