Hitachi WH 12DAF2 Technical Data And Service Manual
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Hitachi WH 12DAF2 Technical Data And Service Manual

Cordless impact driver and cordless impact wrench
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CORDLESS IMPACT DRIVER
CORDLESS IMPACT WRENCH
LIST Nos. WH 12DAF2: G836
WR 12DAF2: G837
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
WH 12DAF2
WR 12DAF2
WH 12DAF2
August 2005
MODELS
WH 12DAF2
WR 12DAF2
Hitachi
Power Tools
TECHNICAL DATA
SERVICE MANUAL
WR 12DAF2
AND
W

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Summary of Contents for Hitachi WH 12DAF2

  • Page 1 Hitachi Power Tools CORDLESS IMPACT DRIVER WH 12DAF2 TECHNICAL DATA CORDLESS IMPACT WRENCH SERVICE MANUAL WR 12DAF2 WH 12DAF2 WR 12DAF2 LIST Nos. WH 12DAF2: G836 August 2005 WR 12DAF2: G837 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • Page 2 REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of company name(s) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows: WH 12DAF2 Competitor Symbol Utilized Company Name Model Name...

  • Page 3: Table Of Contents

    10-1. Precautions in Disassembly and Reassembly ................21 10-2. Precautions in Disassembly and Reassembly of Battery Charger ..........27 11. STANDARD REPAIR TIME (UNIT) SCHEDULES............... 28 For Model WH 12DAF2 .......................... 28 For Model WR 12DAF2 .......................... 29 Assembly Diagram for WH 12DAF2...

  • Page 4: Product Name

    Convenient belt hook with LED job light Bit holder Powerful new design With the introduction of the new Models WH 12DAF2 and WR 12DAF2, we aim to increase our market share and sales. 3. APPLICATIONS Tightening/loosening of small screws, tapping screws, wood screws, bolts, nuts, etc.

  • Page 5: Selling Points

    5. SELLING POINTS (1) Cordless impact driver Model WH 12DAF2 Powerful new design Durable die-casting aluminum hammer case Fast tightening speed 30% faster than the Model WH 12DAF Max. torque 110 N m (975 in-lbs.) • WH 12DAF: 88 N m (780 in-lbs.)
  • Page 6 (2) Cordless impact wrench Model WR 12DAF2 Powerful new design Durable die-casting aluminum hammer case Max. torque 130 N m (1150 in-lbs.) • WR 12DAF: 110 N m (975 in-lbs.) • Soft-grip handle Variable speed reversible switch with electric brake Convenient belt hook with LED job light --- 3 ---...

  • Page 7: Selling Point Descriptions

    5.3 mm diameter and 120 mm length) The maximum tightening torque and the tightening speed of the Model WH 12DAF2 are greatly increased in comparison with the Model WH 12DAF thanks to the increased output of the motor and the large hammer.
  • Page 8 400 (347 in-lbs.) the Model WH 12DAF). 200 (174 in-lbs.) WH 12DAF WH 12DAF2 P *1 Fig. 2 Tightening torque comparison *1: Max. tightening torque is based on tighting an M14 high-strength tension bolt in 3 seconds with a hexagon socket (40 mm long).

  • Page 9: Specifications

    6. SPECIFICATIONS 6-1. Specifications Cordless Impact Driver Cordless Impact Wrench Model Item WH 12DAF2 WR 12DAF2 Ordinary bolt M6 --- M14 (1/4" --- 9/16") Small screw M4 --- M8 (5/32" --- 5/16")* Capacity High-strength bolt M6 --- M10 (1/4" --- 25/64") Ordinary bolt M5 --- M12 (3/16"...

  • Page 10: Optional Accessories

    There are two types of attachment sizes for the driver bit and the socket. Please refer to the table below and select the attachment size for the driver bit or socket that is appropriate for your WH 12DAF2. --- 7 ---...
  • Page 11 Plus driver bit Bit No. Code No. No. 2 992671 No. 3 992672 50 mm (2") Hexagon socket Stamped figures Code No. Part Name Stamped figures (mm) (mm) 4 mm Hexagon socket 65 (2-9/16") 7 (1/4") 992689 5 mm Hexagon socket 65 (2-9/16") 8 (5/16") 996177...
  • Page 12 (3) For the Model WR 12DAF2 The Model WR 12DAF2 is a 12.7 square driver specification. Please select the socket with the appropriate attachment size. Each dimension and applicable bolt for each hexagon socket Shape B Shape C Shape D Square Nominal diameter of applicable bolts Dihedral...
  • Page 13 Square Nominal diameter of applicable bolts Dihedral Socket primary dimensions (mm) Code drive Part width Inch dimension name (High- H (mm) screw (Ordinary) (Small type) strength) 12 mm M 8 (5/16") 12 (15/32") 52 (2-3/64") 20 (25/32") 20 (25/32") W 5/16" 34 (1-11/32") 955138 M 8 (5/16")

  • Page 14: Comparisons With Similar Products

    7. COMPARISONS WITH SIMILAR PRODUCTS 7-1. Specification Comparisons 7-1-1. Cordless impact driver Maker HITACHI Model Item WH 12DAF2 WH 12DAF Small screw M4 --- M8 (5/32" --- 5/16") M4 --- M8 (5/32" --- 5/16") Capacity Ordinary bolt M5 --- M12 (3/16" --- 15/32") M4 --- M12 (5/32"...
  • Page 15 7-1-2. Cordless impact wrench Maker HITACHI Model Item WR 12DAF2 WR 12DAF Ordinary bolt M6 --- M14 (1/4" --- 9/16") M6 --- M14 (1/4" --- 9/16") Capacity High-strength bolt M6 --- M12 (1/4" --- 15/32") M6 --- M10 (1/4" --- 3/8") Max.

  • Page 16: Tightening Torque

    7-2. Tightening Torque 7-2-1. Screw diameter and appropriate tightening torque Generally speaking, the appropriate tightening torque for a screw can be determined by the strength grade of the screw and the material tightened. Tables 1 and 2, and Fig. 4 below list data relative to the strength grade of various screws and the appropriate tightening torque.
  • Page 17 High-strength bolt; strength grade Yield point or durable force: 12.9 (45,500 psi) Tensile strength of the bolt: (56,900 psi) Washer 15/32" x 1-3/4" Model WH 12DAF2 (M12 x 45) (in-lbs.) 1200 5/16" x 1-3/6" 3/8" x 1-3/6" (1042) High tension bolt...

  • Page 18: Number Of Screws Or Bolts Driven

    (1) Number of screws or bolts driven Model HITACHI HITACHI Tightening condition WH 12DAF WH 12DAF2 EB 1214S EB 1214L DW9071 Battery (Nominal capacity) (1.4 Ah) (1.7 Ah) (1.4 Ah)

  • Page 19: Precautions In Sales Promotion

    8. PRECAUTIONS IN SALES PROMOTION 8-1. Safety Instructions In the interest of promoting the safest and most efficient use of these tools by all our customers, it is very important that at the time of sale the salesperson carefully 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 and Name Plate attached to each tool.
  • Page 20 (9) Do not attempt to disassemble the storage battery or the charger. Special devices, such as a thermostat, are built into the storage battery and charger to permit rapid charging. Incorrect parts replacement and/or wiring will cause malfunctions which could result in fire or other hazards. Instruct the customer to bring these units to an authorized service center in the event repair or replacement is necessary.

  • Page 21: Tightening Torque Inspection Prior To Operation

    8-2. Tightening Torque Inspection Prior to Operation As described and shown in Para. 7-2-2, the output tightening torque of which the Models WH 12DAF2 and WR 12DAF2 are capable in excess of the rated tightening torque of certain bolts and screws. Accordingly, if the tightening time is prolonged for such bolts and screws, it could cause damage to their threads or, in the worst case, cause them to be sheared off.
  • Page 22 (WR 12DAF2) (in-lbs.) 1600 (1389) 1200 (1048) (694) (347) Number of bolts driven per charge (When using EB 1214S battery) Fig. 6 (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).

  • Page 23: Suggestions And Precautions For The Efficient Use Of The Charger

    8-4. Suggestions and Precautions for the Efficient Use of the Charger (1) Batteries may not be rechargeable immediately after use If the storage batteries are exposed to direct sunshine for an extended period, or if the temperature of the battery is 40 ûC (104 ûF) or higher immediately after they have been used in the tool, the pilot lamp may not light up when the batteries are connected to the Model UC 14YFA or UC 18YG charger.

  • Page 24: Repair Guide

    10-1. Precautions in Disassembly and Reassembly The [Bold] and <Bold> numbers correspond to the item numbers in the Parts List and the exploded assembly diagram. ( [ ]: WH 12DAF2. < >: WR 12DAF2 ) 10-1-1. Disassembly (1) Removal of the Gear Box Ass'y [1] <1>...
  • Page 25 Small flat-blade screwdriver Anvil (B) [9] Retaining Ring [2] Washer (D) [3] Gap of retaining ring Guide Sleeve [5] Fig. 7-1 Fig. 7-2 Hold the body and adjust gap of the retaining ring to Press down washer (D) with the screwdriver. groove of anvil (B), then insert a small flat-blade screwdriver into the groove at an angle.
  • Page 26 Remove the hammer assembly from the J-297 base for washer (S) and support the end surface of Spindle (B) [17] <14>. With a hand press, push down either of the raised faces of the Hammer [11] <8> to compress the Hammer Spring [14] <11>.
  • Page 27 Internal Wire (Red) 115L [27] <24> Motor [26] <23> Red marking Depression for (Indicate positive side) anti-rotating Projection of the Internal Wire (Black) 60L forwarding/reversing lever [28] <25> DC-Speed Control Switch [32] <30> Internal Wire (Red) 115L [27] <24> Internal Wire (Black) 60L [28] <25> Fin [42] <38>...
  • Page 28 (2) Reassembly of Housing (A).(B) Set [31] <28> Mount the Strap (Black) [39] <35> and housing (B) to housing (A), and secure them with the seven Tapping Screws (W/Flange) D4 x 20 (Black) [29] <26>. (3) Reassembly of the mechanical parts (a) Put Washer (S) [15] <12>...
  • Page 29 (5) Reassembly of the Guide Sleeve [5] (Model WH 12DAF2 only) Insert the Steel Ball D3.5 [8] into the hole of the Anvil [9]. Mount the Guide Sleeve [5], the Guide Spring [4] and Washer (D) [3] in sequence. Mount the Retaining Ring [2] into the groove of the anvil using J-295 jigs (A) and (B) for retaining ring as illustrated in Fig.

  • Page 30: Precautions In Disassembly And Reassembly Of Battery Charger

    (9) Screw tightening torque Tapping Screw (W/Sp. Washer) D4 x 40 [6] <2> 1.96 0.49 N m (20 5 kgf cm, 17.4 4.3 in-lbs.) • • • • • • • • • • • • Tapping Screw (W/Flange) D4 x 20 (Black) [29] <26> 1.96 0.49 N m (20...

  • Page 31: Standard Repair Time (Unit) Schedules

    11. STANDARD REPAIR TIME (UNIT) SCHEDULES For Model WH 12DAF2 Variable MODEL 60 min. Fixed Work Flow WH 12DAF2 Hook Ass'y DC-Speed Control Switch Housing (A).(B) Set Inner Cover Damper Motor General Assembly Guide Sleeve Hammer Case Hammer Anvil Steel Ball...

  • Page 32: For Model Wr 12Daf2

    For Model WR 12DAF2 Variable MODEL 60 min. Fixed Work Flow WR 12DAF2 Hook Ass'y DC-Speed Control Switch Housing (A).(B) Set Inner Cover Damper Motor General Assembly Hammer Case Hammer Pin Retainer Steel Ball Plunger Hammer Spring Anvil Spindle Ring Gear Idle Gear Set Needle Roller Gear Box...
  • Page 33 Hitachi Power Tools LIST NO. G836 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT DRIVER 2005 • • Model WH 12DAF2 (E1) 505 506...
  • Page 34 PARTS WH 12DAF2 ITEM CODE NO. DESCRIPTION REMARKS USED 324-854 GEAR BOX (B) ASS’Y 1 INCLUD. 2-5, 7-25 323-939 GEAR BOX (B) ASS’Y INCLUD. 2-5, 7-25 FOR TPE, CHN, SIN, KOR, HKG 315-984 RETAINING RING 315-983 WASHER (D) 320-409 GUIDE SPRING...
  • Page 35 STANDARD ACCESSORIES WH 12DAF2 ITEM CODE NO. DESCRIPTION REMARKS USED CHARGER (MODEL UC 18YG) CHARGER (MODEL UC 14YFA) TORCHLIGHT (MODEL UB 12D) 1 FOR GBR 987-575 CHUCK WRENCH FOR 10VLB-D, 10VLR-D 1 FOR AUS 321-811 DRILL CHUCK 10VLB-D 1 INCLUD. 503 FOR AUS...
  • Page 36 WH 12DAF2 ITEM CODE NO. DESCRIPTION REMARKS USED --- 4 --- Printed in Japan 8 -- 05 (050810N)
  • Page 37 Hitachi Power Tools LIST NO. G837 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT WRENCH 2005 • • Model WR 12DAF2 (E1)
  • Page 38 PARTS WR 12DAF2 ITEM CODE NO. DESCRIPTION REMARKS USED 324-856 GEAR BOX (C) ASS’Y 1 INCLUD. 3, 6-22 992-630 TAPPING SCREW (W/SP. WASHER) D4X40 324-857 HAMMER CASE 323-194 PIN RETAINER 323-193 PLUNGER 323-192 ANVIL (C) ASS’Y 1 INCLUD. 4, 5 959-154 STEEL BALL D5.556 (10 PCS.) 323-949...

  • Page 39: Standard Accessories

    STANDARD ACCESSORIES WR 12DAF2 ITEM CODE NO. DESCRIPTION REMARKS USED CHARGER (MODEL UC 18YG) CHARGER (MODEL UC 14YFA) TORCHLIGHT (MODEL UB 12D) FOR GBR 322-752 BIT ADAPTER FOR AUS, NZL 324-359 CASE 322-611 CASE FOR GBR OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED...
  • Page 40 OPTIONAL ACCESSORIES WR 12DAF2 ITEM CODE NO. DESCRIPTION REMARKS USED 955-139 HEX. SOCKET ASS’Y (LONG) 13MMX52L INCLUD. 617, 618 955-140 HEX. SOCKET ASS’Y (LONG) 14MMX52L INCLUD. 617, 618 955-141 HEX. SOCKET ASS’Y (LONG) 17MMX52L INCLUD. 617, 618 955-149 HEX. SOCKET ASS’Y (LONG) 17MMX75L INCLUD.

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