Ultra Maxbit User Manual
Contents
1. Apply a finishing process Surface the repair area along with the abrasion check template Finishing process l Note i Je To avoid the tip from Pi a a Fo i being exposed to the 7 a poy V7 welding spatter winda lt p o FF lj 1 wet towel around the ype pe ae ie ee eee ee a A ORSU AAJ r ate F Lo face Sj de o f bi t i My 4 7 F7 se en ee ha ep s Fig 26 D309 D316 JIS Z 3221 DF2A hardness 300 or higher JIS Z 3251 Wear checking template Fig 2 7 These angles and the length here shall match the template 13 ULI RA MAXBIT ULTRA MAXBIT Order Sheet Thickness A Say TSS NN a re Jf ety G A 7 aa SSS S CLS SLA ppd SA a whaghaghagha rm SSASACSCE o C D3 PAE EP A PLA AS SSS SS h iY DST M a eE aod 7 7 Jf x EA EA Z A D2 D1 D4 7 21 7227477 3 SRE AE AE EME AE EME ee Va re FE PRPP CT SL LSS SSM i TT TT OT rT Z 7 p Pi Z Sf 4 A P E yd I J 7 Ab SAP SDSSDSIGSIDS i Zs A Y L LLL A NK pe EH A EEL F y i i User Name Usage DTH Model No or Thread type Rotation direction at l drilling Right Left Drilling Direction Vertical Horizontal Diagonal angled Casing pipe Outer diameter D2 Wall thickness Ring Bit Model Single pass Normal Multi use Ring Bit O D Manufacturer s recommendation Ring Bit I D Manufacturer s recommendation Maximum O D of Pilot Bit D3 Manufacturer s recommendatio2. OEA MAXBIT User s Manual MITSUBISHI 2eMITSUBISHI MATERIALS ULIRA MAXBIT Table of Contents Selection of ULTRA MAXBIT 2 System and Product Code 3 4 Usage Trt rc rere ee ee eee ee ee ee 5 Welding Casing Shoe s seeee terres 6 7 lt gt Attaching Ring Bit Tere eee ee ee ee ee eee 8 Setting Use Condition aa ae ee ee ee ee ee ee Q Procedure to Unlock and Relock during Drilling 10 Checking Wear at Pilot Bit 11 12 Build up Welding Repair of Pilot Bit 13 Attachment Order Sheet c see gt 14 During use there is a likehood of tool failure take appropriate safety measures SAFETY WARNING This product contains or produces chemicals known to the State of California to cause cancer such as cobalt 7440 4 84 Proposition 65 California Health and safety Code Section 25249 5 et seq Refer to the applicable material safety data sheet MITSUBISHI FASS Selection of ULTRA MAXBIT When selecting a type of ULTRA MAXBIT make sure that the type of the system equal to the minimum inner diameter of a ring bit and casing pipe size outer diameter and maximum thickness are appropriate to your construction plan Then select the most appropriate ring bit type among three types For dimensions of each type refer to the catalog of the ULTRA MAXBIT If you would like to order a specialized size please
3. bit See Fig 18 Failure to relock can be caused by moving of the ring bit forward as shown in Fig 19 Supply a small volume of air to operate the piston and lower the pilot bit so that the pilot bit and ring bit can be relocked LIRA MAXBIT Checking Wear at Pilot Bit The pilot bit has roles such as receiving energy percussion rotation and feed supplied from the drilling machine drilling the ground the face of the bit and transmitting the energy to the ring bit and the casing shoe See Fig 20 As shown in Pic 4 wear at the face of the bit and at the parts to transmit the rotation and percussion energy to the ring bit progresses across the adge and eventually the pilot bit reaches the end of its usefulness Continuously Using the bit which reaches the end of its usefulness may cause a drilling trouble Conducting a periodic wear check is recommended Draw the casing pipe Part to transmit purcussion energy Part to transmit rotation energy Fig 20 Pic 4 Major wear check points A Button tip and base material If the wear width at the tip end is half of the chip diameter or less regrind the tip end 2 If the base material around the tip is worn and in a pyorrhea like condition tip retention decreases and pop outs will occur B Part to transmit percussion energy to ring bit M Use the template to check the wear 15mm of wear width on the part to transmit the percussion energy
4. fill out the order sheet attached to the manual and contact the contact person of MITSUBISHI Materials Type Minimum inner diameter Pipe outer diameter Hammer type Thread type for a top hammer This is used when the depth of This is used when the depth of This design reduces pulling drill is shallow and casing pipe is drill is deep and casing pipe is not resistance at recovery so that a not removed removed casing pipe and ring bit can be Usage Piling work Usage Well drill work scout used repeatedly boring Usage Anchor work foundation construction ULIRA MAXBIT System Code and Product Code Max thickness gt Max O D The ULTRA MAXBIT is composed of three components 1 PILOT BIT 2 RING BIT 3 CASING SHOE ULTRA MAXBIT is designed for several different casing pipe diameters To find the correct product please refer to the System code and Ring bit Product code shown below Hammer size or hammer type thread type Casing shoe ae Tip shaped hard metal Pilot bit Min I D g US097A 04 T Cennin number E shape R round BB semi ballistic SA spike Hammer size inch or thread type Casing pipe size code Type minimum inner diameter mm of a ring bit Model of ring bit S single pass N normal M multi use Product of ULTRA MAXBIT Single pass 097A 139 7x10 4 hammer
5. indicates it has reached the end of it s lifetime Abnormal wear is mainly caused by tough drilling Conditions and improper use of the system Remove the burr on the angle of the part with a grinder C Shoulder part to transmit percussion energy to casing shoe Gd Use the template to check the wear 15mm of wear width on the part to transmit the percussion energy it has reached the end of it s lifetime Abnormal wear can be caused by hole deviation or a bent pipe 3 Remove the burr on the angle of the part with a grinder if any D Part to transmit rotation energy to ring bit Wear to the half of the spline width indicates it has reached the end of it s lifetime 2 Abnormal wear can be caused by improper locking or reaching the end of the ring bit lifetime Use the checking template to check the wear 15mm of wear width indicates it has reached the end of it s lifetime Stop using the product this if so Fitting the template Set the corner of the template to the reference edge of the protrusion as shown in Fig 2 1 Wear check template Protrusion Reference edge Fig 2 1 Criterion for end of lifetime The wear width reaching the mark of wear limit a concave indicates end of the production lifetime as shown in Fig 25 10mm or less 10mm A OOC Wear to be noted Initial to medium term wear Fig 23 Fig 24 Model of template Use a template with a proper model No for each type as sho
6. 1 Do not apply a grease Sand may be l caught by the grease 1 Check the nominal type on the sticker l l attached on the product l A product with a different nominal type l l l can not be used fees Sip are eee ey ee i eee ee eee Pic 3 ULIRA MAXBIT Setting Use Condition The ULTRA MAXBIT is used for simultaneous casing drilling in disintegrative poor ground Adoption of a double pipe bit system enables the system to apply to a broad range of geological conditions such as a sand layer weak layer and boulder layer The following drill conditions are recommended Standard speed is 15 20m min Refer to the following figure for rotation Select the range of uniform rotation during drilling Bit rotation speed 100 Rotation of Bit min 4 8 12 16 20 24 28 32 Nominal Size of Bit in Pressure Set between 0 7 and 1 0MPa 100 150Opsi Consider the depth of underground water when drilling through the layer In case of 3B0m 90ft depth add 0 3MPa 45psi to the air pressure Do not set over 1 5MPa 225psi Air Supply Set the air supply using the following formula ge V Dee 1273500 Q Air supply m8 min D Inside diameter of casing mm d V Outside diameter of jacket or hammer mm Air speed 1 100 to 1 500 m min Fig 15 4 MITSUBISHI Procedure to Unlock and Relock during Drilling The ULTRA MAXBIT enables the p
7. 3262 5095 Fax 55 11 3285 4906 E Mail mmbr mmbr com br Mexico MMC METAL DE MEXICO S A DE C V Av La Canada No 16 Parque Industrial Bernardo Quintana El Marques Queretaro Tel 52 442 221 6136 52 442 221 6137 Fax 52 442 221 6134 E Mail htasmina mmcmex com Australia RYOKO SANGYO CORPORATION 59 Tacoma Circuit Canning Vale WA 6155 Australia PO Box 1550 Canning Vale B C WA 6970 Australia Tel 61 8 9256 4002 Fax 61 8 9256 4471 E Mail ryokos bigpond com HOMEPAGE ADDRESS http mrt mitsubishicarbide com The specifications in the catalogue are subject to alternation without notice for improvement of products Ae Printed in Japan
8. L Hammer size inch or thread type Maximum thickness of a casing pipe mm Casing pipe outer diameter mm Casing pipe size code Type minimum inner diameter mm of a ring bit Model of ring bit S single pass N normal M multi use MITSUBISHI om Bit gauge diameter mm a Casing pipe size code Type minimum inner diameter mm of a ring bit Model of ring bit S single pass N normal M multi use MEA L Identification number a tt Tip shape R round BB semi ballistic SA spike Ring bit Product of ULTRA MAXBIT Identification number Casing pipe size code Type minimum inner diameter mm of a ring bit Specification N normal H hard type or enhanced type for side drilling T top hammer Casing top Product of ULTRA MAXBIT 4 UP097ADH340R01 4 Perth gpn Identification number A D Tip shape R round BBA ii batlistic SA spike Hammer type or wee y Z La Casing pipe size code a Type minimum inner diameter oi of a ring bit Pilot bit Product of ULTRA MAXBIT ULIRA MAXBIT Horizontal direction Usage The ULTRA MAXBIT can drill vertically horizontally and diagonally To drill efficiently adequate flushing is required Auger Rod is recommended Vertical direction Diagonal direction Fig 6 dation construction Iction steel pipe end acceptance con
9. Shoe The casing shoe must be correctly welded to the casing in order to carry out Successful casing drilling If the casing shoe is not welded accurately to the casing mis alignment will result This can cause the following problems 1 Hole deviation 2 Damage to the casing 3 Damage to the shoulder of pilot bit If these problems arise the recovery of the pilot bit may not be possible ee Chamfer the end of the casing at an angle between SO 40 degree FIG 10 In very difficult broken ground the following additional operation should be carried out Cut a radius of 15 20 degree at the following intervals 4 Casing or smaller 2 Radius cuts 8S Casing or smaller 4 Radius cuts eam Larger than 8 6 Radius cuts ii Refer FIG1 1 Fig 10 Fig 1 1 Caution Ensure that all Surfaces to be welded are perfectly clean and free from any contamination including moisture The casing and casing shoe consists of different materials caution must be taken when welding these items so that weld cracks are not generated Metal components of casing Shoe S45C SAE No 1045 C 0 42 0 48 Si 0 15 0 385 Mn 0 60 0 90 P lt 0 380 S lt 0 35 Cu lt 0 30 Ni Cr lt 0 35 OLIRA MAXBIT Select a low hydrogen solvent for the casing shoe welding Pre heat and post heat the chamfer of the casing shoe before and after welding respectively Recommended weld solvent JIS D4313 AWS E7016 JIS YGW11 AWS ER70S G Pre heat P
10. ilot bit and ring bit to be easily unlocked Separated and relocked reconnect even during drilling This mechanism facilitates a flushing action and enhances efficiency of the subsequent drilling Follow the procedure below to unlock or relock the pilot bit and ring bit After drilling reaches a certain position flush the hole while lightly moving the bit up and down with the bit locked 2 After the piston of the hammer starts operating slowly rotate the ring bit counterclockwise one or two revolutions 3 Raise the bit by 1 to 2m Perform the flushing action while rotating the bit clockwise Caution Raising the whole pipe with the bit locked may cause trouble in the locking system If the ring bit is rotated counterclockwise rapidly in the step inertia generated when the rotation stops gets the ring bit locked again Likewise if the clockwise rotation is stopped at high speed the inertia may get the ring bit unlocked e Fig 1 7 Slowly lower the bit with the air supply stopped while rotating it clockwise 2 Rotate the bit several times after it is lowered to the bottom Slowly raise the bit 3 Confirm that the pilot bit and ring bit are locked Supply air and restart drilling Caution If the bit is lowered without stopping the air supply the piston is operated and a spline of the pilot bit hits the ring bit pushing it forward Ensure that the air supply is stopped before lowering the
11. n Quantity demanded Drilling meter Number of hole Minimum order quantity Plot Bit Ring Bit amp Casing Shoe Expected Delivery Time Information such as geological conditions conventionally used bit a manufacturer size of assing through bit gauge and hammer type Remark p g g gaug yp Contact MITSUBISHI MATERIALS CORPORATION Name of preparer ADVANCED MATERIALS amp TOOLS COMPANY ROCK TOOLS OVERSEAS OPERATIONS CENTER TEL 0584 27 5011 FAX 0584 27 5022 http mrt mitsubishicarbide com Phone number a MITSUBISHI MATERIALS CORPORATION Japan ROCK TOOLS OVERSEAS OPERATIONS CENTER Godo cho Anpachi Gun Gifu Pref 503 2394 Japan Tel 81 584 27 5011 Fax 81 584 27 5022 E Mail rocktool mmc co jp Subsidiaries of MITSUBISHI MATERIALS CORPORATION U S A MITSUBISHI MATERIALS U S A CORPORATION Los Angeles Head Office 17401 Eastman Street Irvine CA 92614 U S A Tel 1 949 862 5176 1 800 423 1358 Fax 1 949 862 5184 E Mail rock mmus com Germany MMC HARTMETALL GMBH Comeniusstr 2 40670 Meerbusch Germany Tel 49 2159 9189 41 Fax 49 2159 9189 79 E Mail eric mmc wanadoo fr Singapore MMC METAL SINGAPORE PTE LTD 10 Arumugan Road 04 00 Lion Industrial Bldg Singapore 409957 Tel 65 743 9370 Fax 65 749 1469 E Mail mmcmetal mms com sg Brazil MMC METAL DO BRASIL LTDA Rua Cincinato Braga 340 13 andar Bela Vista CEP 01333 010 S o Paulo SP BRASIL Tel 55 11
12. reheat the groove of the casing shoe to 300 C Post heat Post heat it to approx 600 C and cool it down gradually Heat it from SOO to 500 C slowly Take sufficient time to weld them temporarily not to cause a weld crack due to sudden heating or cooling Weld them in the diagonal order as shown in Fig 13 Completely remove the slag during the temporary welding Fig 13 Ensure that sufficient weld is applied to both casing and casing shoe and excess weld is built up Finally grind off excess weld from outer diameter of casing If excess weld is not removed it will interfere with smooth installation of the casing Trt FW cr nr a s t ap E A E a i ii a a Sat nat Sat O Tah ae faa ae Nae aa Nat a to oy o ha es a Fig 14 MITSUBISHI PAR Attaching Ring Bit The ULTRA MAXBIT system adopts a simple and user friendly method which is to couple the ring bit and casing shoe with a thread Attachment of the ring bit is completed only by fitting the thread to the casing top pre welded to the first casing pipe Ring bit Casing shoe Down the hole hammer specification gt Most of the down the hole hammers rotate clockwise The ring bit and the casing shoe are fit with left hand threads Top hammer specification gt Most of the top hammers rotate Pic 2 counterclockwise The ring bit and the casing shoe are fit with right hand threads l _ Caution
13. struction The ULTRA MAXBIT has several uses The drill rod may be left in the hole foundation pile May be used for impregnating Surrounding ground with chemical solutions In these applications a single pass bit is used Construction process 1 Drilling 2 Retrieve the pilot bit 3 Infuse the chemical solution to improve the ground The ULTRA MAXBIT may be used to install casing collar pipe in badly fractured ground In this application a normal bit is used This operation is carried out in the following sequence Drill hole with ULTRA MAXBIT combined with casing Continue to drill hole until solid ground is reached When hole is in solid ground retrieve the pilot bit leaving the casing and ring bit in the hole Change to a smaller diameter conventional DTH bit and continue drilling to complete the hole in solid ground Smaller diameter DTH bit enables drilling past casing and ring bit Construction process Fig 8 1 Drilling 2 Retrieve the pilot bit 3 Insert the single bit 4 Drilling The hole is drilled through the broken ground and the casing is used to install the foundation materials After this operation is complete the casing pipe is removed and can be re used In this application a multiple use bit is used Construction process 1 Drilling 2 Retrieve the pilot bit 3 Set the foundation materials 4 Retrieve the casing pipe MITSUBISHI MITSUBISHI MATERIALS Welding Casing
14. wn in Table 1 Template model No 12 Part to transmit percussion energy Protrusion 4 MITSUBISHI at part to transmit percussion energy Wear check template Fig 22 15mm Wear limit End of lifetime Model No Fig 25 Table 1 Applicable type of pilot bit T 01 T 02 050A 072A 097A 105A 110A 116A T 03 T 04 118A 127A 127B 232A 126A 128A 170A T 05 T 06 132A 151A 140A T 07 143A 270A 273A 281A T 08 167A 192A T 09 165A 216A 219A 228A 270A T 10 T 11 215A 265A 300A 396A T 12 240A T 13 157A 200A 223A 354A ULIRA MAXBIT MITSUBISHI PA MATERIALS Build up Welding Repair of Pilot Bit While the pilot bit adopts a heat treated special steel to obtain high abrasion resistance this special steel is not suitable for build up welding repair of the worn product The following describes the build up welding repair procedure Carefully follow the procedure to perform the build up welding repair Trouble such as a weld crack can be caused A product repaired with the build up welding can not be guaranteed Build up welding repair procedure Pre heat the base material to 200 to SOOT 2 Underlay a stainless material letting it penetrate shallowly for the first layer 3 Weld the second layer and later one with a hardening built up weld solvent Gradually cool the pilot bit Never rapidly cool it
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