IMPACT WRENCH Model WR 22SA - hitachi
Contents
1. 961 400 HEX HD TAPPING SCREW D5X70 30 324 017 INTERNAL WIRE WHITE 30 324 009 INTERNAL WIRE WHITE FOR USA CAN VEN INA SYR KUW HKG SIN 31 324 018 324 010 INTERNAL WIRE BLACK INTERNAL WIRE BLACK FOR USA CAN VEN INA SYR KUW HKG SIN 340 620C STATOR 110V 120V 340 620E STATOR 220V 230V 340 620F STATOR 240V 34 960 356 303 694 TERMINAL A M3 5 10 PCS TAPPING SCREW W FLANGE D4X35 BLACK 35 324 020 HANDLE COVER 36 985 103 SWITCH 2P SCREW TYPE 36 320 528 SWITCH 2P SCREW TYPE FOR AUT GBR FRA FRG ITA HOL BEL ESP FIN 37 323 768 324 319 SWITCH ADAPTER NOISE SUPPRESSOR ASS Y W RESISTOR INCLUD 39 40 43 EXCEPT FOR USA CAN VEN INA SYR KUW HKG SIN 930 153 SUPPORT B EXCEPT FOR USA CAN VEN INA SYR KUW HKG SIN I Ps AB e 316 186 SUPPORT B EXCEPT FOR USA CAN VEN INA SYR ALTERNATIVE PARTS 3 05 PARTS ES 958 308Z PILLAR TERMINAL A WR 22SA 324 023 SUPPORT B 961 419Z TERMINAL EXCEPT FOR USA CAN VEN INA SYR KUW HKG SIN 608 VVM BALL BEARING 608VVC2PS2L NAME PLATE 323 997 TAIL COVER 877 839 SEAL LOCK HEX SOCKET HD BOLT M5X10 984 750 TAPPING SCREW W FLANGE D4X16 937 631 953 327 CORD CLIP CORD ARMOR D8 82. MODEL WR 22SA Hitachi Power Tools TECHNICAL DATA IMPACT WRENCH RAE WR 22SA SERVICE MANUAL LIST No E707 Mar 2005 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT Throughout this TECHNICAL DATA AND SERVICE MANUAL symbols are used in the place of company names and model names of our competitors The symbols utilized here are as follows Competitor Symbol Utilized Company Name Model Name CONTENTS Page 1 PRODUCT U NS U U U ares 1 2 MARKETINGOBJEGTIVEL 1 s 1 SELEING POINTS aan dan LM da ane aan aan am UE 2 Selling CSCI ON ONS m Ge ee 3 5 SPECIFICATIONS ce 5 5 1 DECC ANOS PTE H 5 2 Optional ACCOSSOIIBS 6 6 COMPARISONS WITH SIMILAR PRODUCTIS 7 6 1 Specification Comparisons ee de ent 7 6 2 Tightening Torque MET 8 6 3 Appropriate Tightening Torque for Bolts 4 8 6 4 Tightening Torque Characteristics when Using an Extension Cord 9 7 PRECAUTIONS IN SALES PROMOTION 10 7 1 Safety I
3. 938 051 CORD ARMOR D10 1 500 2472 CORD CORD ARMOR D8 8 500 234Z CORD CORD ARMOR D8 8 FOR INA KOR 500 450Z 500 461Z CORD CORD ARMOR D8 8 FOR GBR 230V CORD ARMOR D8 8 FOR GBR 110V 500 245Z CORD ARMOR D10 1 FOR SYR 323 974 CORD ARMOR D10 1 FOR VEN TPE 500 240Z CORD ARMOR D8 8 FOR USA CAN 500 439Z 500 4232 CORD ARMOR 08 8 FOR AUS NZL CORD CORD ARMOR D8 8 FOR KUW SIN 500 435Z CORD CORD ARMOR D8 8 FOR HKG 500 456Z CORD CORD ARMOR D8 8 FOR CHN HITACHI LABEL 935 829 999 043 BRUSH CAP CARBON BRUSH 1 PAIR 957 774 BRUSH HOLDER 324 019 HOUSING ASS Y 938 477 HEX SOCKET SET SCREW M5X8 ALTERNATIVE PARTS WR 22SA STANDARD ACCESSORIES CODE NO DESCRIPTION 324 015 SIDE HANDLE ASS Y 980 901 SIDE HANDLE 323 775 HANDLE HOLDER 324 016 HANDLE RING 502 505 980 903 SQUARE BOLT 8 OPTIONAL ACCESSORIES ommo _ 874 535 EXTENSION BAR ASS Y SQUARE 19 0MMX150L INCLUD 602 603 874 524 SOCKET RING 874 525 SOCKET PIN 955 088 UNIVERSAL JOINT ASS Y INCLUD 602 603 955 091 986 004 UNIVERSAL JOINT PIN ADAPTER ASS Y 12 7MM INCLUD 602 603 874 527 HEX SOCKET ASS Y 23MMX55L INCLUD 602 603
4. 3 9 1 5 40 5 kgf cm Tapping Screw W Flange D4 34 48 cernens 2 0 t 0 5 20 5 kgf cm e Brush 53 inner 1 0 5 N m 108 kgf cm Machine screw at the Switch 36 0 8 0 2 N m 8 2 kgf cm Hd Tapping Screw D5 x 70 29 2 9 0 5 N m 30 5 kgf cm 9 3 Insulation Tests On completion of disassembly and repair measure the insulation resistance and conduct a dielectric strength test Be sure to perform the insulation resistance measurement and the dielectric strength test between the plug pins and the outside metallic parts such as the anvil Insulation resistance 7 M Q or more Dielectric strength 2 500 V 1 minute 110 V to 120 V 4 000 V 1 minute 220 V to 240 V 9 4 No load Current Value After no load operation for 30 minutes the no load current should be as follows 110 V 4 0 lower 120 V 3 8 Aor lower 220 V 2 0 A or lower 230 V 2 1 Aor lower 240 V 2 0 A or lower Jo 10 STANDARD REPAIR TIME UNIT SCHEDULES w wa M ENE m Handle Cover Switch Adapter Cord Armor General Assembly Tail Cover O Housing Ass y Armature Ball Bearing 6200DD Ball Bearing 608VV Inner Cover Ball Bearing 6908ZZ Hammer Spindle Steel Ball Idle Gear Set D7 14 x 2
5. 874 528 HEX SOCKET ASS Y 24MMX55L INCLUD 602 603 874 529 HEX SOCKET ASS Y 26MMX55L INCLUD 602 603 874 530 874 532 HEX SOCKET ASS Y 27MMX55L SOCKET ASS Y 30MMX55L INCLUD INCLUD 602 603 602 603 874 523 SOCKET ASS Y 32MMX55L INCLUD 602 603 874 533 SOCKET ASS Y 35MMX55L INCLUD 602 603 874 534 SOCKET ASS Y 36MMX55L INCLUD 602 603 955 028 955 029 SOCKET ASS Y LONG 17MMX60L SOCKET ASS Y LONG 19MMX60L INCLUD INCLUD 602 603 602 603 955 030 SOCKET ASS Y LONG 21MMX60L INCLUD 602 603 955 031 SOCKET ASS Y LONG 22MMX60L INCLUD 602 603 955 033 SOCKET ASS Y LONG 24MMX60L INCLUD 602 603 955 034 955 035 SOCKET ASS Y LONG 26MMX85L SOCKET ASS Y LONG 27MMX85L INCLUD INCLUD 602 603 602 603 955 037 SOCKET ASS Y LONG 30MMX85L INCLUD 602 603 955 038 SOCKET ASS Y LONG 32MMX100L INCLUD 602 603 SOCKET ASS Y LONG 36MMX100L INCLUD 602 603 955 092 Printed in Japan 3 05 050330N ALTERNATIVE PARTS Hitachi Koki Co Ltd Tokyo Japan
6. Gear Shaft x 2 Steel Ball D3 97 x 38 Spring Spring Seat Hammer Case Ass y O ring Anvil Ring Gear Hitachi Power Tools LIST NO E707 ELECTRIC TOOL PARTS LIST B IMPACT WRENCH 2005 3 30 Model WR 22SA E1 PARTS WR 22SA cope wo 324 008 BUMPER 323 994 SEAL LOCK HEX SOCKET HD BOLT M5X45 324 006 HAMMER CASE ASS Y 971 028 O RING P 28 324 007 324 013 INCLUD 1 4 5 METAL ANVIL A 324 021 ANVIL B ASS Y INCLUD 13 15 FOR USA CAN AUS 959 151 STEEL BALL D7 14 10 PCS 324 005 HAMMER 959 155 324 004 STEEL BALL D3 97 10 PCS HAMMER WASHER 324 002 SPRING 324 001 SPRING SEAT 949 507 ROLL PIN D2X14 10 PCS FOR USA CAN AUS 992 571 992 572 SPRING PLUNGER FOR USA CAN AUS FOR USA CAN AUS 16 971 016 GEAR SHAFT 17 324 003 SPINDLE 18 318 448 IDLE GEAR SET 2 PCS 19 991 449 985 303 NEEDLE ROLLER RING GEAR 690 8ZN BALL BEARING 690822 323 995 PACKING B 323 999 INNER COVER 25 323 996 971 012 FELT PACKING PACKING WASHER 26 620 0DD BALL BEARING 6200DDCMPS2L 27 360 700U ARMATURE ASS Y 110V 120V 27 360 700E ARMATURE 220V 230V 27 28 360 700F 323 998 ARMATURE 240V FAN GUIDE 1 INCLUD 26 44 29
7. is the highest level in this class 2 More durable double insulated motor thanks to the highly strong rigid aluminum die cast body The motor is contained in the highly rigid aluminum die cast body and the handle integrated plastic cylinder doubly for higher rigidity of the housing Thanks to this double insulation structure the durability of the motor is remarkably increased In addition the rear portion of the main body is covered with resin tail cover for higher durability The resin tail cover also prevents the CB cap from loosening Aluminum die cast body Handle integrated plastic cylinder Tail cover resin 3 Slip resistant and comfortable soft grip handle The grip of the Model WR 22SA is soft slip resistant and comfortable thanks to the soft material elastomer resin covered on the handle The Model WR 22SA gives minimum fatigue to the operator s hand even if it is operated for a long time 4 Large bumper protects the outer frame e Prevention of damaging and staining workpieces The Model WR 228A minimizes damaging workpieces even if it contacts the workpiece e he hammer case is not hot when touched during continuous operation The hammer case is covered with a large bumper Because the bumper is resistant to transmitting heat the bumper is not hot even if held by hand during operation 5 Grip end is shaped like a finger stopper for portability The grip end is thickened to make it as a finger stopper
8. our market share with this Model WR 228A 3 APPLICATIONS O Tightening loosening of bolts nuts etc OTightening of screw washers anchor nuts Applicable Markets O Wooden construction industry Tightening of bolts screw washers etc O Construction industry Tightening loosening of bolts in steel structure works for construction of buildings etc O Manufacturing industry Tightening loosening of bolts for automobiles rolling stock shipbuilding agricultural machinery and tools construction machinery etc O Utility industry Assembly and installation of electric equipment plumbing facilities sanitary fixtures and various other facilities OOthers Tightening loosening of bolts in steel structure works for construction of bridges and railways 4 SELLING POINTS Powerful motor Class top tightening torque Novel design thanks to the optimally balanced design Most compact and lightweight in the class More durable double insulated motor thanks to the highly strong rigid aluminum die cast body Patent pending Large bumper protects the outer frame Slip resistant and comfortable soft Convenient grip handle tumbler switch Grip end is shaped like a finger stopper for portability 4 1 Selling Point Descriptions 1 Class top tightening torque With the powerful motor and the computer analysis for optimum impact at tightening the tightening torque of the Model WR 22SA is 610 N m which
9. body weight Note 1 5 7 12 6 lbs ctr not 0 Ibs 0 Ibs 3 30 230 ow ow 5 55 M 24 88 88 3 4 3 4 lt 2 Tumbler switch with Tumbler switch with Tumbler switch with forward reverse forward reverse forward reverse Type of switch changeover changeover changeover pushing button pushing button pushing button 25 821 Not provided Not provided Not provided Note 1 The cord socket and side handle are excluded Motor characteristics Variable speed trigger switch with forward reverse changeover pushing button stepless 6 2 Tightening Torque Figure 1 shows a comparison of tightening torque with the Model WH 22 C and B Tightening torque N m Tightening time S Bolt M22 x 70 F10T high tension bolt Steel plate SS34P 30 mm in thickness Fig 1 6 3 Appropriate Tightening Torque for Bolts Generally speaking the appropriate tightening torque for a bolt can be determined by the strength grade of the bolt or the material tightened Tables 2 3 and 4 below list data relative to the strength grade of various bolts and the appropriate tightening torque For further reference appropriate tightening torque is calculated with the following formula Study and use this formula for accurate selection of tightening torque T T Tightening torque kgf cm d Nominal diameter for the bolt cm p Recommended axial tightening force
10. cing continuous operation oe 7 3 Tightening Torque Variation The tightening torque of an impact wrench may vary slightly in accordance with the factors described below Salespersons are requested to advise the customer to confirm that appropriate tightening torque is obtained by measuring the torque at the beginning of the tightening operations and as necessary during tightening operations In addition the torque values shown in Para 6 2 6 3 and 6 4 above are uselul as a handy reference and may be utilized as tentative standards 1 Voltage The tightening torque of an impact wrench is influenced by voltage For example the tightening torque will be reduced to about 90 if the Model WR 22SA is operated with 90 of the rated voltage The line voltage may be reduced by the use of a long extension cord depending on the work sites Take the following countermeasures against voltage reduction caused by the resistance of an extension cord and the load current O Decrease the resistance of an extension cord Use an extension cord which is as short as possible and has a thick core O Compensate for reduction of the voltage by using a step up transformer At this time prevent the plug voltage of the main body from exceeding the rated voltage Advise the customer to use an extension cord which is as thick as possible cross sectional area of the core of the extension cord 1 25 mm or larger if it is unavoidable to use a long extension cord on a bui
11. er to Para 5 2 for appropriate socket dimensions 3 Hammering section lubrication Grease Doubrex 251 optional accessory is applied to the hammering section Frequent or continuous use of the tool will cause excessive temperature rise of the hammering section resulting in depletion of grease and subsequent increased wear of components which will in turn cause loss of tightening efficiency Accordingly itis necessary to periodically replenish grease in the hammering section to ensure proper lubrication of moving and sliding components NE eee 9 REPAIR GUIDE The procedures and the precautions in disassembly and reassembly are described below The bold numbers correspond to the item numbers in the Parts List and the exploded assembly diagram of the Model WR 22SA 9 1 Disassembly 1 Hammer Case 3 a Removal of the Hammer Case Ass y 3 Remove the four Seal Lock Hex Socket Hd Bolts M5 x 45 2 Supporting the Hammer Case Ass y 3 tap the tip of the Anvil 6 with a wooden hammer to remove the Hammer Case Ass y 3 Remove Packing B 22 from between the Hammer Case Ass y 3 and the Inner Cover 23 b Removal of the Anvil 6 Hemove the Hammer Case Ass y 3 Then the Anvil 6 can be removed from the bearing portion of the Hammer Case Ass y 3 c Removal of the Ring Gear 20 and the Needle Roller 19 Tap the end surface of the Hammer Case Ass y 3 with a wooden hammer to remove the Ring Gear 20 a
12. for portability 5 SPECIFICATIONS 5 1 Specifications Ordinary bolt M14 9 16 M24 15 16 cT High tension bolt M16 5 8 M22 7 8 Tightening torque 610 N m 162 2 kgf cm 5 390 in Ibs Tip condition 19 mm 3 4 Width across flat of the socket mounting portion Type of motor Single phase AC commutator motor Single phase AC 50 60 Hz Double insulation Power requirement Insulation method Enclosure Aluminum die casting Polyamide resin Elastomer Housing Polyamide resin Handle cover tail cover Aluminum die casting Hammer case inner cover Rubber Bumper Type of switch Tumbler switch with forward reverse changeover pushing button Handle configuration T type Power consumption 800 W China 850 W Europe U S A Korea Taiwan Australia and New Zealand 1140 W Other Asian countries Full load current 8 1 A 110 V 7 5 A 120 V 5 5 220 V 4 5 2 A 230 V 3 5 0 A 240 V 3 1 800 min 2 000 min 4 8 kg 10 6 Ibs Excludes cord socket and side handle Packaged 7 3 kg 16 1 Ibs Overall length x height 303 mm x 236 mm 11 15 16 x 9 9 32 Center height 43 mm 1 11 16 Package 1 A 220 V Korea 3 8 A 220 V China 9 A 230 V Europe and New Zealand 7 240 V Australia No load rotation speed Impact rate Main body i lt Plastic case 2 core cabtire cable Nominal cross 2 sectional area 1 0 mm 8 0 mm 2 5 m Outs
13. he steel ball guide at the Hammer 8 c Put the two Steel Balls D7 14 7 in the steel ball guide Check that these Steel Balls D7 14 7 are in the cam groove Then release the hand press 3 Mounting direction of the Packing Washer 25 Insert the Packing Washer 25 into the Inner Cover 23 in the proper direction together with the Felt Packing 24 when mounting the Armature 27 to the Inner Cover 23 23 24 25 27 4 Mounting the cord clip Cord dia 8 5 mm max Cord dia Over 8 5 mm 48 49 Fig 11 2 5 Grease Greasing locations a Apply grease Doubrex 251 to the following locations e Spindle 17 Cam groove sliding section and engaged portion with the Anvil 6 e Hammer 8 Cam groove sliding section and the click e Steel Balls D7 14 7 e Steel Balls 03 97 9 e Hammer Washer 10 e Sliding section of the Spring Seat 12 Inner circumference of the metal in the Hammer Case Ass y 3 b Apply grease Nippeco SEP 3A to the following locations Pinion tooth flanks of the Armature 27 e Tooth flanks of the Ring Gear 20 Tooth flanks and inner circumference of the Gear Shaft 16 and the Idle Gear Set 18 6 Screw tightening torque e Seal Lock Hex Socket Hd Bolt M5 x 45 2 7 8 1 5 N m 80 15 kgf cm e Seal Lock Hex Socket Hd Bolt M5 x 10 47
14. ide diameter Length Standard accessory Side handle and plastic case 5 2 Optional Accessories 1 Dimensions of each hexagon socket and applicable bolts Shape C Shape D o O le Lisl Square Nominal diameter of applicable bolts Dihedral Socket primary drive Part Code width amp dimensions mm dimension name NO High tension _ SO H mm a Sq mm Ordinary Small type C em sz js 6 ann ms ue we a jo 5 mms SO s we ww wm jo w sms wm wm m ons wm wm wm _ el w fo s 2 Dimensions of each long hexagon socket and applicable bolts 19 0 mm 3 4 Hexagon socket Shape B it 22 955 031 955 033 955 034 19 0 3 4 27 955 035 30 955 037 955 038 20 Dihedral width NO High tension 29 Ordinary Small type Hexagon socket 3 Extension bar Code No 874535 4 Universal joint Code No 955088 6 COMPARISONS WITH SIMILAR PRODUCTS 6 1 Specification Comparisons Maker Model HITACHI HITACHI WR 22SA WH 22 5 19 lt Table 1 gt Capaci Ordinary bolt M 14 M 24 M 14 M 24 M 16 M 22 High tension bolt M 16 M 22 M 16 M 22 M 16 M 20 gt Max tightening torque _ 43 111107 46 1 19167 Main
15. lding site In addition recommend the customer to use a step up transformer to step up the voltage by the amount of reduction previously 2 Effects of low ambient temperatures The tightening torque required may be reduced at low ambient temperatures or under the influence of grease and different torque coefficients dependent on manufacturing and finishing processes and specified by bolt manufacturers 3 Different bolt diameter Required levels of tightening torque may vary according to the bolt diameters Generally speaking the higher tightening torque is required for the larger diameter bolt 4 Different materials being tightened When a bolt is tightened into a soft material such as aluminum plastic wood etc the tightening torque becomes considerably lower than when the bolt is tightened into a hard material such as steel 5 Different tightening conditions The tightening torque may vary in accordance with bolt torque coefficient dependent on manufacturing processes and specified by bolt manufacturers bolt grade and bolt length even though the diameters of the bolts are the same Tightening torque may also vary depending on the surface finishing state of tightening materials steel aluminum etc and materials to be tightened In addition if there is a seal packing or a clearance between tightening materials the tightening torque is decreased LESS 6 Wear and looseness of the socket With extended u
16. lly ensures that the buyer seriously recognizes the importance of the contents of the Handling Instructions and fully understands the meaning of the precautions listed on the Caution Plate attached to each tool 7 1 1 Handling Instructions Salespersons must be thoroughly familiar with the contents of the Handling Instructions in order to give pertinent advice to the customer 7 1 2 Caution Plates 1 The following precautions are listed on the Caution Plate attached to the main body of each tool For Australia and New Zealand CAUTION eRead thoroughly HANDLING INSTRUCTIONS before use e For U S A and Canada WARNING To reduce the risk of injury user must read and understand instruction manual AVERTISSEMENT eatin de reduire le risque de blessures l utilisateur doit lire et bien comprendre le mode d emploi e For China ES ERI BITS CE SR DR EAHA 7 2 Tightening Torque Inspection Prior to Operation The output tightening torque of the Model WR 22SA is higher than the rated tightening torque of certain bolts Accordingly if the tightening time is prolonged for such bolts it could cause damage to their threads or in the worst case cause them to be sheared off This phenomenon is common to all existing impact wrenches The customer should be advised to carry out several bolt tightening operations and adjust the tightening time as necessary by measuring the tightening torque before commen
17. nd the Needle Roller 19 If the Ring Gear 20 and the Needle Roller 19 cannot be removed warm up the Hammer Case Ass y 3 then tap it with a wooden hammer to remove them 1 Fig 3 2 Removal of the Spring 11 Push the click of the Hammer 8 with a hand press and keep it at the position where the Spring 11 is compressed fully Remove the two Steel Balls D7 14 7 from the steel ball guide at the cam portion of the Spindle 17 and the Hammer 8 with a flat blade screwdriver Then release the hand press and remove the Hammer 8 from the Spindle 17 to remove the Spring 11 Be careful not to lose the thirty eight Steel Balls D3 97 9 and the Hammer Washer 10 mounted between the Hammer 8 and the Spring 11 during disassembly Spindle Hammer click Spindle cam top Hammer Steel ball Steel ball guide Fig 4 7 8 9 10 O Pr i 12 Fig 5 14 3 Removal of the Armature 27 Remove the Seal Lock Hex Socket Hd Bolt M5 x 10 47 from the Tail Cover 46 and remove the Tail Cover 46 Remove the Brush Cap 53 and the Carbon Brushes 54 Then the Armature 27 can be removed together with the Inner Cover 23 from the Housing Ass y 56 Be careful not to lose the Felt Packing 24 and the Packing Washer 25 when removing the Armature 27 from the Inner Cover 23 23 56 N g 9 54 lt Fig 6 4 Removal of the Switch 36 Rem
18. nstructions NEED E 10 7 2 Tightening Torque Inspection Prior to Operation RL 10 Tioghteninog Torgue VANGUOM Se Um 11 7 4 Temperature CC TT SEE 12 8 OTHER PRECAUTIONS u 12 9 REPAIR QUE c S 13 gt iY sens E 13 PP SOON EO T t qM 16 9 3 InsuldUon SR ences aieateseatnsaaceauetoiacesaechaieusseuexsasieaseqncedeasyestiectdeesstecneeouste 18 9 4 No load Current 18 10 STANDARD REPAIR TIME UNIT SCHEDULES 19 Assembly Diagram for WR 22SA 1 PRODUCT NAME Hitachi Impact Wrench Model WR 22SA 2 MARKETING OBJECTIVE The new impact wrench Model WR 22SA is the upgraded version of the Model WH 22 featuring the class top tightening torque by the computer analyzed optimum impacting operation compact and lightweight body In addition the Model WR 22SA has the more durable motor that is contained in the highly strong aluminum die cast body and the handle integrated plastic cylinder The Model WR 22SA is powerful and novel thanks to the 3 D CAD engineering as well as the double layer molding improved handle grip and large bumper to plainly differentiate it from the competitors Please expand
19. ove the Tapping Screw W Flange D4 x 35 Black 94 from the Handle Cover 35 and remove the Handle Cover 35 Remove the screw from the Switch 36 and remove the Switch Adapter 37 Then the Switch 36 can be removed 34 Fig 7 9 2 Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse However special attention should be given to the following items 1 Housing ass y Mounting the switch Pay attention to the relationship between the terminal numbers of the Switch 36 and the colors of the internal wires BLACK WHITE WITH NOISE SUPPRESSOR TYPE M3 SCREW TIGHTENING TORQUE 0 820 2N m 8z2kgf cm 4 PCS BLACK xl BLUE PILLAR TERMINAL SWITCH STATOR ASS Y NOISE SUPPRESSOR ASS Y OTHERS TYPE M3 SCREW TIGHTENING TORQUE 0 840 N m 4 PCS BLACK gt 2 3 j I INTERNAL WIRE en 14 WHITE 15 6 PILLAR TERMINAL SWITCH STATOR ASS Y Fig 9 Wiring diagram 6 2 Hammer Case Ass y 3 Mounting the hammer a Put the thirty eight Steel Balls D3 97 9 in between the Hammer 8 and the Hammer Washer 10 b Mount the Spring 11 and the Spring Seat 12 to the Hammer 8 then insert the Spindle 17 into it Push the click of the Hammer 8 with a hand press and keep it at the position where the Spring 11 is compressed fully Push the Hammer 8 so that the Spindle 17 cam top is aligned with t
20. se the hexagonal portion of the socket which is fitted to the head of the bolt and the hexagonal portion which is fitted onto the anvil in the main body will become worn and loose Wear and looseness will cause a proportionate loss of tightening torque In addition use of an incorrect size socket will also result in decreased torque 7 Bolt and nut rotate together Tightening torque that can be achieved will be considerably decreased if the bolt and the nut rotate together during the tightening operation The customer should be advised to carefully observe the operation and ensure this does not occur 7 4 Temperature Rise If the Model WR 22SA is used for tightening bolts which require long time to be tightened continuously it will cause temperature rise of the motor and burnout subsequently Advise the customer to perform no load operation for several minutes to cool the motor if the outer frame of the main body becomes hot 8 OTHER PRECAUTIONS 1 Check for cracks or other damage on the socket Cracks or any other faults on the socket are very hazardous and decrease the tightening torque Advise the customer to ensure that there are no abnormalities on the socket before operation 2 Socket dimensions Without fail utilize an appropriate socket which matches the bolt size If the clearance between the socket and the nut is large it will not only cause insufficient tightening torque but also cause damage to the socket easily Please ref
21. to be applied to the bolt kg p rated axial stress kg mm 0 8 x effective sectional area of the bolt k Torque coefficient 0 17 O Strength grade and rated axial stress of bolts Table 2 gt s 88 ss NN MM t Material Carbon steel such as SS and SC Special alloy steel such as SNC SCM and SNCM Heat treatment Not treated Treated Hard material O Diameters and effective sectional areas of bolts lt Table 3 gt Nominal diameter of bolt M14 x 2 0 M16 x 2 0 M18 x 2 5 M20 x 2 5 M22 x 2 5 M24 x 3 0 393 0 Effective sectional area of bolt mm 115 0 157 0 192 0 245 0 303 0 Tightening torque according to strength grade of bolts kgf cm Table 4 6 4 Tightening Torque Characteristics when Using an Extension Cord Figure 2 shows relationship between the tightening time and the tightening torque when using an extension cord While the data are useful for handy reference actual tightening torque will vary depending on tightening conditions 800 100 600 Z s 500 5 400 gt meme en using 60 m EL 0l Ll Tightening time S Bolt M22 x 70 F10T high tension bolt Steel plate SS34P 30 mm in thickness Fig 2 7 PRECAUTIONS IN SALES PROMOTION 7 1 Safety Instructions In the interest of promoting the safest and most efficient use of the Model WR 22SA by all our customers it is very important that at the time of sale the salesperson carefu
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