SERVICE MANUAL RITE-TORQ OVERLOAD CLUTCHES
Contents
1. Split hub with clamping bolts on both ends for easy installation Other mounting configurations available Dowel pin fabrication for precise alignment and performance Adjustable torque setting with external locking set screw No special tools required Precision hardened needle thrust bearings ensure longer life by eliminating sliding friction Smaller compact Splash proof cover available pha as ddd as an option flange design provides for external trip detection CAD drawings available in any format FIGURE 1 Location Map RT amp RTM Series 3 46G 7 8 9 OUT I0210 3 0 5 07 138 d9 2 A GE 7 8 9 00 11 02 03 47 MODEL RT S S MODEL RT EA CLUTCH TYPE ITEM PART NAME S S S F F S F F 1 CLUTCH HOUSING SPLIT CLAMP FOR SHAFT 2 CLUTCH HOUSING PILOT FOR FLANGE MTG 3 CLAMP SCREW 4 TORQUE ADJUSTING RING NUT 5 LOCKING SET SCREW 6 SPRINGS 7 PRESSURE TRIP DETECTION RING 8 THRUST RACE THIN 9 THRUST BEARING 10 THRUST RACE THICK 11 ROLLER 12 DETENT PLATE SET 13 DOWEL PIN CLUTCH 14 SCREW CLUTCH 15 DOWEL PIN COUPLING 16 SCREW COUPLING 17 RETAINER 18 COUPLING 19 CLAMP SCREW Location Map RTL Series LS der CJ gt 2 LET E GE 2 D WS E zz a 15 FIGURE 2 Rite Torq Numb2. same same 17 0 140 RTL 20 1 00 1 750 400 2000 20 250 1200 092 RTL 20FCB same same 33 0 437 RTL 60 1 000 2 250 1200 6000 33 624 Se Ee RTL 60FCB same same 60 1 154 RTL 120 1 500 2 750 2400 12000 56 1 327 S00 Ane RTL 120FCB same same 97 2 500 CHART 2 Installation NOTE Ferguson detent style torque limiters are single positioning and will re engage on each revolution Avoid continuous tripping as it will cause serious damage to the mechanisms NOTE Use of a limit switch mechanical or proximity provided by the user is required to shut down the power after the initial trip Ferguson torque limiters are provided with a switch actuating plate or flange to detect the axial tripping movement IMC recommends using limit switches with rated travel not to exceed 008 for actuation WARNING TORQUE LIMITERS e ARE NOT TO BE USED AS A SAFETY DEVICE e ARE NOT MEANT TO PROTECT TOOLING e SHOULD NOT BE USED FOR OVERHAULING OR LIFTING LOADS SUCH AS VERTICAL CONVEYORS OR TRUNNION TYPE FIXTURING e SHOULD NOT BE OPERATED MOTOR SPEEDS e IF PROPERLY SET WILL PROTECT THE INTERNAL MECHANISM OF THE INDEX DRIVE RT amp RTM Series NOTE Clutch torque is preset at the factory for application if known or the users request Final adjustment is required by the user after the load is applied Adjustment procedures can be found on page 13 of this manual 1 RT amp RTM Series torque limiter
3. designed to protect the Index Drive only and will not protect against bodily injury Double check to be sure the power is off and cannot be turned on while working on the equipment Use extreme caution with jammed or unbalanced loads which when cleared may set the machine in motion Keep all objects such as hands clothing and tools away from rotating or moving parts Use safety glasses or equivalent to protect your eyes Dowel pins and mounting screws must not protrude from the drive plate or driven member as the clutch could become a solid coupling High humidity contaminants or wash down applications may cause rust within the clutch resulting in operational failure Lubricate every six months or more frequently as the application requires The FERGUSON clutch is not a FAIL SAFE device and cannot be used on overhauling or holding load applications 10 When using chain drives incorporate an idler sprocket to eliminate any slack NOTE The above list includes major safety points to be observed but should not be considered as limiting in safety precautions to be followed NOTE In the event the unit is damaged contact Industrial Motion Control s Wheeling factory or your local representative for replacement Operating Environment This product is intended to operate in a clean environment Excessive coolant chips dust dirt or debris can adversely affect its performance and life If this device does operate in a dirty
4. not exceeding 008 for actuation The torque required to re engage the clutch is usually 25 of the rating Contact IMC for special design anti friction materials if the clutch is to be used with very low torque settings Never use the clutch with a torque setting close to the calculated operating torque Actual torques may be higher Torque spring tolerances and coefficients of friction vary with temperature and application Allow 130 1 3 service factor when applying a FERGUSON clutch Requesting Service Call our Technical Service Department in Wheeling IL USA at 800 645 5207 or 847 459 5200 between 8 00AM and 4 30PM CST When requesting service always provide the following information 1 2 The model number of the torque limiter A clear description of the problem including as much detail as possible of the circumstances leading up to the problem Overview The drawings contained in this document are for illustrative purposes only They are not intended to accurately represent the components and therefore are not to scale The various models may be different than shown depending upon options chosen or the particular configuration Heavy duty die Five unequally spaced precision springs for hardened steel rollers with detent plates quick response provide consistent operation with zero and long life backlash and single position reset All steel construction for rugged performance in any environment
5. 00 9500 2 225 1300 4000 9000 Illustrated In 2 Ve 150 1200 3500 8000 Tripped Condition 3 100 1000 3000 7000 3Y 800 2500 6000 FIGURE 8 A JL 600 2000 5000 4 500 1700 4500 5 VU cx 400 1400 4000 5 NEE 1200 3500 6 Ice 3000 6 2 2400 CHART 6 Adjust trip torque Figure 8 by loosening locknuts Tighten torque adjusting screws all the way down Back torque adjusting screws off the number of turns in Chart 6 to the desired torque range Tighten locking nuts to maintain setting Check the distance between torque adjusting screw heads and locking nuts All must be the same to insure even spring compression NOTE All Industrial Motion Control detent clutches are reset by af oN 1 Turning the power off 2 Clear jam condition 3 Rotate machine manually or slow jog until clutch snaps back in the home position Torque limiter will re engage from either direction 14 Maintenance NOTE FERGUSON detent torque limiters are factory lubricated and sealed Unless the unit is subjected to severe loads frequent tripping or harsh environment replenishment of lubricant is seldom necessary more often than once a year 1 Annually disassembly unit clean and inspect parts Check bearings and seals and replace if necessary Inspect detents and detent plate for wear If necessary replace torque limiter 2 Apply a general purpose lithium based NLGI grade 2 grease
6. AL INSTALLATION SPECIFICATIONS Trip Torque Actuator IN LBS Max Plate Sprocket Mounting Max Model MIN MAX RPM Travel Thread B C NO Pilot Dia Bore 5 100 500 1800 073 IN V4 20X5 8 dp 3 750 IN 4 2 500 1 250 IN 20 400 2000 1200 092 IN Y 20X3 4 dp 4 875 IN 6 3 375 1 750 IN 60 1200 6000 900 110 IN 5 16 18X3 4 dp 6 000 IN 6 4 000 2 250 IN 120 2400 12000 600 146 IN 3 8 16X1 dp 7 000 IN 6 4 750 2 750 IN 10 CHART 3 METRIC INSTALLATION SPECIFICATIONS Trip Torque Actuator Nm Max Plate Sprocket Mounting Max Model MIN MAX RPM Travel Thread B C NO Pilot Dia Bore 5 11 3 56 5 1800 1 85 mm N A 95 3 mm 4 63 5 mm 31 8 mm 20 58 4 113 0 1200 2 34 mm N A 123 8 mm 6 85 7 mm 44 5 mm 60 175 2 875 9 900 2 79 mm N A 152 4 mm 6 101 6 mm 57 2 mm 120 350 4 1751 8 600 3 71 mm N A 177 8 mm 6 120 7 mm 69 9 mm CHART 4 NOTE RTL amp RTL FCB Torque Limiters are built in English dimensions unless otherwise noted Metric measures above are approximate conversion from English only 10 Slide torque limiter onto shaft of reducer etc with sprocket side as close as possible to the bearing of the unit without rubbing Secure torque limiter in place by tightening the two set screws provided Again the use of Loctite is recommended Additional clamping can be provided by using an arrestor bolt and washer to hold the uni
7. Automation Robohand FERGUSON CAMEO SERVICE MANUAL RITE TORQ OVERLOAD CLUTCHES TORQUE LIMITERS WARNING This is a controlled document It is your responsibility to deliver this information to the end user of the CAMCO or FERGUSON product Failure to deliver this could result in your liability for injury to the user or damage to the machine For copies of this manual call your Customer Service Representative at 800 645 5207 TABLE OF CONTENTS General Information EE 3 SOLS ee 3 Operating Glen E 3 Application Neu Le E e E 4 Requesting Service ENEE 4 OVERVIEW E i tt cll ee E ee ek 5 Location Map RT amp RTM Senne scticciiietieccecestccetsesianianccenetteebenibandeaatiieds 6 Location Map RTL Series AAR 7 leede 8 e dein EE 9 PU CePA LAM SEES eege 9 RTL amp RTL FCB E 10 AGIUSIMONIS 044 0 vee are ter bs aes eo ee E 12 AT RE TEE 12 Spring Sets for RT Clutches cccccceceeeeeeeeeecneeeeeeeeeeeeecaaeeeeeeeeeeeeecaeeeeeeeeentee 13 Ellen Eege ere ene ai 14 ee e 15 General Information The FERGUSON Torque Limiter is a high quality precision mechanism To gain the optimum benefits the guidelines described in this manual should be used Safety Read and follow all Warnings and Cautions prior to any service or repair 1 Read your Overload Clutch Installation Operation Instructions thoroughly before operating the unit for your safety and the protection of your unit FERGUSON Overload Clutches are
8. alignment by checking the gap between the coupling and the torque limiter with a ruler caliper or gauge The gap should be even all around but not exceed 0 5 degree as previously mentioned see Figure 3 Determine parallel alignment by use of a straight edge or indicator A straight edge should lie evenly on both members but not to exceed 005 see Figure 4 Fit key into shaft keyways and hand apply thin coat of anti seize compound NOTE Torque limiter and coupling with maximum bores have shallow keyways Separate torque limiter amp coupling hub by pulling or prying apart FCB Series only Mount the torque limiter to the driving or driven shaft on the slow speed side of the reducer and secure it by tightening the two set screws The use of Loctite 242 or similar adhesive on the set screws is recommended Slide the coupling hub onto the shaft to be connected Align the studs on the torque limiter and hub with the holes in the elastomer bushings Figure 6 in the opposing members and slide the hub towards the torque limiter until the members are seated together Align the shafts per the above tolerances and tighten the coupling hub to the shaft using the furnished standard QD type bushing NOTE Steps 9 10 apply to basic RTL type clutch Assemble the sprocket pulley etc to the torque limiter using the tapped holes provided by Industrial Motion Control CAUTION SCREW THREAD DEPTH MUST NOT EXCEED THAT LISTED IN CHART 3 IMPERI
9. environment periodic cleaning must be practiced and careful inspection of seals and accessories is necessary Application Recommendations 1 10 11 On applications other than the output of an IMC Index Drive clutch speeds must not exceed 100 RPM High humidity contaminants or wash down applications may require special protection If rust forms within the clutch it may act as a solid coupling and will not release under overload conditions Lubricate every six months or more frequently as the application requires Use bronze bushings on sprockets dials gears or pulleys when used at the high end of the speed range 100 RPM to reduce wear Clutch couplings require accurate shaft alignment of 003 TIR Insure that a clearance gap is maintained between the body and the drive plate around the full circumference to the clutch Type RT S S Use flange mounted clutches and clutch couplings whenever possible These models provide superior mounting reliability Type RT F F or D Dowel pins should not protrude from the drive plate or driven members as they may lock against the adjacent surface Do not operate without the detector limit switch electrically disconnecting the prime mover motor as galling of the contacting surfaces may result On high inertia applications braking the prime mover is recommended in the dwell cycle of the INDEX DRIVE to minimize over travel IMC recommends using limit switches with rated travel
10. er 5 20 60 120 Item No Part Name Part Number 1 Housing Body 51 201 601 1201 2 End Plate 52 202 602 1202 3 Pressure Ring 53 203 603 1203 4 Actuator Plate 54 204 604 1204 5 Spacer Stud 55 205 605 1205 6 Torque Adj Screw 56 206 606 1206 7 Locking Nut 57 207 607 1207 8 Thrust Washer 58 208 608 1208 9 Hub 59 209 609 1209 10 Spring 510 2010 6010 12010 11 Needle Bearing 511 2011 6011 12011 12 Thrust Bearing 512 2012 6012 12012 13 Thrust Race 513 2013 6013 12013 14 Oil Seal 514 2014 6014 12014 15 O Ring 515 2015 6015 12015 16 Ball 516 2016 6016 12016 17 Locknut 517 2017 6017 12017 18 Hex Head Bolt 518 2018 6018 12018 19 Lock Washer 519 2019 6019 12019 20 Set Screw 520 2020 6020 12020 CHART 1 Specifications Maximum Mode ege nn ee Polar Moment RRM Gee swih less crating Section Travel in in Ib Ib Ib in sec in mm Nm kg om mm RT 3 500 750 100 500 4 6 019 024 sa 0 06 RTM 3 11 0 19 0 11 3 56 5 2 3 0 003 0 003 1 5 RT 5 750 1 250 500 3500 13 16 111 141 0 08 RTM 5 16 0 32 0 56 5 339 1 5 9 7 3 0 013 0 016 Me 1 7 RT 6 1 000 2 000 2000 8500 28 37 322 441 Wii 0 09 RTM 6 25 0 50 0 113 0 960 7 12 7 16 8 0 036 0 05 2 4 RT 8 1 500 2 750 2500 12000 51 72 1 19 1 68 vr 0 11 RTM 8 38 0 63 0 452 1 1751 8 1 32 7 0 130 0 190 2 9 in in Ib Ib Ib in sec in RTL 5 750 1 250 100 150 11 085 1800 073 RTL 5FCB
11. m RT RTM3 1 100 175 12 20 10 1 13 6001 RT RTM3 2 175 275 20 31 15 1 69 6002 RT RTM3 3 250 350 28 40 20 2 26 6003 RT RTM3 4 325 500 37 56 30 3 39 6004 RT RTM5 1 500 850 56 96 50 5 56 6001 RT RTM5 2 800 1700 90 192 100 11 30 6002 RT RTM5 3 1600 3000 181 339 200 22 60 6003 RT RTM6 1 1000 2700 113 305 275 31 07 6001 RT RTM6 2 2500 5000 282 565 525 59 22 6002 RT RTM6 3 4000 8500 452 960 950 107 34 6003 RT RTM8 1 4000 9500 455 1073 600 67 79 6001 RT RTM8 2 6000 15500 678 1750 900 101 69 6002 NOTE Torque per turn of nut CHART 5 13 RTL amp RTL FCB Series NOTE Trip torque should be less than the maximum the machine can absorb without risk but great enough to prevent undesirable nuisance tripping due to inertia or starting loads Ideally trip torque should be approximately 40 higher than the operating torque of the machine WARNING F THE DRIVE HAS A BRAKE MOTOR THE TRIP SETTING MUST BE WELL ABOVE THE BRAKE TORQUE OTHERWISE WITH A HIGH INERTIA DRIVE THE CLUTCH MAY TRIP WHEN THE BRAKE IS APPLIED ALLOWING THE MACHINE TO RUN UNCONTROLLED BY THE BRAKE Torque i Approximate Static Trip Torque Adj Screws Number IN LBS Of RTL 5 RTL 50 RTL 60 RTL 120 Turns 0 500 2000 6000 12000 L 450 1900 5500 11500 1 375 1700 5000 10500 1 300 1500 45
12. s do not have flexible couplings For shaft shaft models it is necessary to align mating shafts before installation of clutches Use a dial indicator or similar instrument Fit and install key s into shaft keyway s and hand apply a light coat of anti seize compound to shaft surface Never Seize is a brand of such product Loosen bolt in clamping hub s and slide torque limiter onto driving shaft to required depth Tighten bolt in clamp hub securely Either end of shaft shaft clutches can be installed on driving shaft Slide driven shaft into clutch and tighten bolt in clamping hub securely Assemble sprockets pulleys etc onto flange side of shaft flange or flange flange torque limiter using tapped holes and dowel holes provided by Ferguson Torque limiter should be assembled to slow speed shaft of reducers indexers etc for greatest sensitivity Slide clutch onto shaft with sprocket side as close as possible to bearing in reducer etc Tighten bolt in clamping hub securely Mount and adjust limit switch into proper position with clutch trip flange Turn on power and inspect RTL amp RTL FCB Series wh LO OT Ze 9 NOTE Steps 1 8 apply to RTL FCB type clutch RTL FCB shaft shaft torque limiters are furnished with a flexible coupling to tolerate moderate angular and or parallel misalignment The maximum acceptable angular misalignment is 0 5 degree and maximum acceptable parallel offset is 0 005 Determine angular
13. t against a shaft shoulder or clamping collar see Figure 5 NOTE Steps 11 12 apply to both RTL and RTL FCB clutches 11 Mount and adjust limit switch into proper position with switch trip plate 12 Turn on power and inspect Straight Edge Parallel Tapered Coupling Angular Misalignment Parallel Misalignment FIGURE 3 FIGURE 4 Arrester Bolt And Washer CO H Your i DC ien E 2 iy Shoulder FIGURE 6 Altern ate Clamp FIGURE 5 Adjustments Torque Adiustinag Nut 12 RT amp RTM Series e Locking Set Screw EE FIGURE 7 1 To adjust trip torque remove locking set screw Use spanner wrench to adjust nut position Turn clockwise to increase torque or counterclockwise to decrease See Chart 5 for torque adjustment values 2 Replace locking set screw after achieving required torque NOTE 1 Total torque range in the different models is achieved by a combination of different spring groups and applied pressure through the adjusting nut Chart 5 below show the different torque ranges available for each spring group When re ordering specify model e g RT3 6001 etc for your required spring range NOTE 2 If a tamper proof setting is desired apply a permanent adhesive such as Loctite 680 to the set screw after achieving the required trip torque value Spring Sets for RT Clutches Torque Range Nut Adjustment RT Clutch Range in lbs Nm in lbs N
14. to bearings thrust washers detent seats and track rubbing surfaces and the threads of adjusting nut or screws 15 Aone court Automation Robohand FERGUSON Camco CAMCO amp FERGUSON Products 1444 South Wolf Road Wheeling IL 60090 USA ph 847 459 5200 toll free 800 645 5200 fax 847 459 3064 camco destaco com ISO 9001 2000 Registered DE STA CO Headquarters Auburn Hills Michigan USA 248 836 6700 marketing destaco com www destaco com This publication is for information purposes only and should not be considered a binding description of the product except is confirmed in writing by Industrial Motion Control LLC DE STA CO DE STA CO Europe Germany 49 6171 705 0 europe destaco com DE STA CO Asia Thailand 66 2 326 0812 info destaco com DE STA CO South America Brazil 0800 124070 samerica destaco com DE STA CO 2004 2014 All rights reserved Printed in U S A SKU 0108 REV 4 04
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