1. Manuals
  2. Brands
  3. Hitachi Manuals
  4. Impact Driver
  5. WH9DM
  6. Technical data and service manual

Hitachi WH 9DM Technical Data And Service Manual

Cordless impact driver cordless impact wrench
Hide thumbs Also See for WH 9DM:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Operation Manual & Safety Instructions
CORDLESS IMPACT DRIVER
CORDLESS IMPACT WRENCH
LIST Nos. WH 9DM: F863
WR 9DM: F865
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
WH 9DM
WR 9DM
WH 9DM
Oct. 2001
MODEL
WH 9DM
WR 9DM
POWER TOOLS
TECHNICAL DATA
SERVICE MANUAL
WR 9DM
AND
W

Advertisement

Table of Contents
loading

Related Manuals for Hitachi WH 9DM

Summary of Contents for Hitachi WH 9DM

  • Page 1 WR 9DM POWER TOOLS CORDLESS IMPACT DRIVER WH 9DM TECHNICAL DATA CORDLESS IMPACT WRENCH WR 9DM SERVICE MANUAL WH 9DM WR 9DM LIST Nos. WH 9DM: F863 Oct. 2001 WR 9DM: F865 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 9DM Competitor Symbol Utilized Model Name Company Name...

  • Page 3: Table Of Contents

    9. REPAIR GUIDE ..........................22 9-1. Precautions in Disassembly and Reassembly ................22 9-2. Precautions in Disassembly and Reassembly of Battery Charger ..........29 10. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............30 Assembly Diagram for WH 9DM Assembly Diagram for WR 9DM...

  • Page 4: Product Name

    The Model WH 9DM provides 30% faster tightening speed than the previous Model WH 8DH and this is the class- top speed. The WR 9DM has a square drive dimension of 9.5 mm. Since the Model WR 12DM has a square dimension of 12.7 mm, two square drive dimensions are available with those Impact series.

  • Page 5: Selling Points

    4. SELLING POINTS (1) Cordless Impact Driver: WH 9DM Class-top tightening speed 30% faster than the previous model (Example: When tightening a wood screw 90 mm in length) WH 9DM: 3.8 seconds WH 8DH: 5.2 seconds C: 5.0 seconds -Reference- WH 12DM (new model): 2.9 seconds...
  • Page 6 (2) Cordless Impact Wrench: WR 9DM Compact body Overall length of the Model WR 9DM compared with following models: WR 8DH: -14 mm (Reference) WR 12DM: -6 mm Height of the Model WR 9DM with respect to: WR 8DH: +1 mm (Reference) WR 12DM: -5 mm Selling points common to the...

  • Page 7: Selling Point Descriptions

    WH 8DH/WR 8DH. The Models WH 9DM/WR 9DM are convenient for working in narrow places. The weight is about 70 g lighter than the Model WH 12DM (12-V product). The reason why the Models WH 9DM/ WR 9DM are heavier than C by 80 g is because they are equipped with a metal ring gear while C is equipped with a plastic ring gear.
  • Page 8 Model WH 8DH and C is shown below (refer to pages 15 and later for detailed data on the tightening time and the working capacity). For reference, the tightening speed of the Model WH 9DM is about 8% higher than the previous Model WH 12DH (12 V product) though it is about 40% slower than the Model WH 12DM.

  • Page 9: Specifications

    5. SPECIFICATIONS 5-1. Specifications Model Cordless Impact Driver Cordless Impact Wrench Item WH 9DM WR 9DM Small screw M4 --- M8 (5/32" --- 5/16")* Ordinary bolt M6 --- M14 (1/4" --- 9/16") Capacity Ordinary bolt M5 --- M12 (3/16" --- 15/32") High-strength bolt M6 --- M10 (1/4"...

  • Page 10: Optional Accessories

    High battery Stays ON constantly because storage battery Green pilot lamp is lit. temperature temperature is too high. 5-2. Optional Accessories (1) Optional accessories for the Model WH 9DM • Plus driver bit Bit No. Code No. No. 2 992671 50 mm (2")
  • Page 11 • Drill chuck adaptor set (Code No. 996195) The drill chuck adaptor set permits mounting of various types of locally-available drill bits for a variety of drilling operations. (2) Optional accessories for the Model WR 9DM • Primary dimensions and applicable bolts for accessory hexagon sockets: Shape C Shape B Shape D...
  • Page 12 • Primary dimensions and applicable bolts for accessory long sockets: Shape B Shape D φ Square Nominal diameter of applicable bolts Dihedral Socket primary dimensions (mm) Code Part drive width dimension name Inch φ H (mm) φ (Small) (Ordinary) Sq (mm) 8 mm M 5 (3/16") 60 (2-3/8")

  • Page 13: Comparisons With Similar Products

    6. COMPARISONS WITH SIMILAR PRODUCTS 6-1. Specification Comparisons (Cordless Impact Driver) Maker HITACHI Model WH 9DM WH 8DH Item M 4 --- M 8 M 4 --- M 8 M 4 --- M 8 Small screw (5/32" --- 5/16")* (5/32" --- 5/16") (5/32"...

  • Page 14: Specification Comparisons (Cordless Impact Wrench)

    6-2. Specification Comparisons (Cordless Impact Wrench) Maker HITACHI Model WR 9DM WR 8DH Item M 6 --- M 14 M 6 --- M 14 Ordinary bolt (1/4" --- 9/16") (1/4" --- 9/16") Capacity M 6 --- M 10 M 6 --- M 10 High-strength bolt (1/4"...

  • Page 15: Tightening Torque

    6-3. Tightening Torque 6-3-1. Tightening torque characteristic comparisons (1) Impact driver Thanks to the high-power rare-earth magnet motor and the computer analysis, the Model WH 9DM gives optimum impact at tightening screws and the tightening torque is increased. WH 9DM Test conditions •...
  • Page 16 6-3-2. 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. 2 below list data relative to the strength grade of various screws and the appropriate tightening torque.
  • Page 17 High-strength bolt; strengh grade Yield point or durable force: 12.9 (45,500 psi) Tensile strength of the bolt: (56,900 psi) 15/32" x 1-3/4" • • (M12 x 45) Model WH 9DM (in-lbs.) • 1200 5/16" x 1-3/6" 3/8" x 1-3/6" (1042) • • •...

  • Page 18: Tightening Speed

    1 Wood screw 4.2 mm dia. x 90 mm length, hemlock spruce Fast Slow Model sec. 3.8 sec. HITACHI WH 9DM 5.2 sec. HITACHI WH 8DH 5.0 sec. 2 Wood screw 4.2 mm dia. x 90 mm length, lauan Fast...

  • Page 19: Number Of Screws Or Bolts Driven

    1,060 (M8 x 16 mm) Note 1) The Model WH 9DM is equipped with the higher-power motor for the higher tightening speed. Although the higher tightening speed is realized, the Model WH 9DM has the following disadvantage. High startup current The Model WH 9DM consumes higher power than C for driving a short or machine screw because it requires high startup current.

  • Page 20: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION 7-1. 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 21 Ensure that all customers understand that Type EB 9B or EB 930H Storage Batteries should be turned into any Hitachi power tool sales outlet or authorized service center when they are no longer capable of being recharged or repaired. If thrown into a fire, the batteries may explode, or if discarded indiscriminately, leakage of the cadmium compound contained in the battery may cause environmental pollution.

  • Page 22: Tightening Torque Inspection Prior To Operation

    7-2. Tightening Torque Inspection Prior to Operation As described and shown in Para. 6-3-3, the output tightening torque of which the Models WH 9DM and WR 9DM 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 23: Suggestions And Precautions For The Efficient Use Of The Charger

    (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 Differences in bolt diameter will cause variation of the required levels of tightening torque.

  • Page 24: Other Precautions

    8. OTHER PRECAUTIONS (1) Check for cracks or other damage on the socket Cracks or any other faults on the socket are very hazardous. In addition, cracks or other damage to accessories will cause loss of tightening torque efficiency. Advise the customer to inspect accessories often, and ensure there are no abnormalities.

  • Page 25: Repair Guide

    9-1. 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 9DM, < >: WR 9DM ) 9-1-1. Disassembly (1) Removal of Guide Sleeve (A) [4] (Model WH 9DM only) Remove the Retaining Ring [1], Washer (D) [2], Guide Spring [3] and Guide Sleeve (A) [4] in order by following the procedure shown in Figs.
  • Page 26 (2) Removal of the Hammer Case [7] <3> and the hammer assembly Remove the four Tapping Screws (W/SP. Washer) D4 x 25 (Black) [6] <2> that connect the Hammer Case [7] <3> with Housing (A). (B) Set [33] <28> and remove the Hammer Case [7] <3> and the hammer assembly from Housing (A).(B) Set [33] <28>.
  • Page 27 (5) Removal of the Hook Ass'y [39] <34> Remove the Special Screw M5 [43] <38> with a flat-blade screwdriver or a coin and remove the Hook Ass'y [39] <34> and the Hook Spring [42] <37>. (6) Removal of Housing (B) Remove the seven Tapping Screws (W/Flange) D4 x 20 (Black) [31] <26>...
  • Page 28 (10) Removal of the Armature Ass'y [25] <20> [20] <15> Support the Inner Cover [24] <19> so that it does not contact the [21] <16> fan of the Armature Ass'y [25] <20>. With a hand press, push [22] <17> down the tip portion of Armature Ass'y (pinion) [25] <20> to remove it.
  • Page 29 (c) Mount a unit of the Inner Cover [24] <19>, Magnet [26] <21> (including the Dust Guard Fin [27] <22>) and the Brush Block [28] <23> to housing (A) (see Fig. 12). Pay attention to the following items. Adjust the protrusion of the Dust Guard Fin [27] <22> to the notch of the Magnet [26] <21> when mounting the Dust Guard Fin [27] <22>...
  • Page 30 (d) Mount the DC-Speed Control Switch [36] <31> to housing (A) so that the protrusion of the forward/reverse lever at the top of the switch is inserted into the U-shaped groove of the Pushing Button [37] <32>. Apply silicone grease (KS609, Shin-Etsu Chemical Co., Ltd.) to the contacting surfaces of the FET of the DC-Speed Control Switch [36] <31>...
  • Page 31 Put Anvil (C) [9] or Anvil (M) <4> on the Spindle [17] <12>. Cover it with the Hammer Case [7] <3> and secure with the four Tapping Screws (W/SP. Washer) D4 x 25 (Black) [6] <2>. (6) Mounting Guide Sleeve (A) [4] (WH 9DM only) Insert the two Steel Balls D3.5 [8] into the hole of Push down.

  • Page 32: Precautions In Disassembly And Reassembly Of Battery Charger

    • Metal oil groove of the Hammer Case [7] <3> • Twenty-eight Steel Balls D3.175 [12] <7> (b) HITACHI MOTOR GREASE No. 29 (WH 9DM only) • Two Steel Balls D3.5 [8] • Sliding section between Anvil (C) [9] and Guide Sleeve (A) [4] (c) MOLUB-ALLOY 777-1 •...

  • Page 33: Standard Repair Time (Unit) Schedules

    10. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Fixed Work Flow WH 9DM WR 9DM DC-Speed Control Switch Housing (A).(B) Set Inner Cover Armature Ass'y Magnet Brush Block General Assembly Hammer Case Steel Ball Washer Hammer (A) Anvil (B)
  • Page 34 LIST NO. F863 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT DRIVER 2001 • • Model WH 9DM (E1)
  • Page 35 PARTS WH 9DM ITEM CODE NO. DESCRIPTION REMARKS USED 315-984 RETAINING RING 315-983 WASHER (D) 320-409 GUIDE SPRING 319-921 GUIDE SLEEVE (A) 320-418 FRONT CAP 319-917 TAPPING SCREW (W/SP. WASHER) D4X25 (BLACK) 320-411 HAMMER CASE 319-535 STEEL BALL D3.5 (10 PCS.)

  • Page 36: Standard Accessories

    STANDARD ACCESSORIES WH 9DM ITEM CODE NO. DESCRIPTION REMARKS USED CHARGER (MODEL UC 14YF2) 320-377 CASE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 992-671 + DRIVER BIT (B) NO.2 50L 992-672 + DRIVER BIT (B) NO.3 50L 996-177 NON-MAGNETIC HEX. SOCKET 8MM 65L 985-329 NON-MAGNETIC HEX.
  • Page 37 WH 9DM ITEM CODE NO. DESCRIPTION REMARKS USED --- 4 --- 10 -- 01 Printed in Japan (011025N)
  • Page 38 LIST NO. F865 ELECTRIC TOOL PARTS LIST CORDLESS IMPACT WRENCH 2001 • • Model WR 9DM (E1)
  • Page 39 NAME PLATE 320-412 HOUSING (A).(B) SET CAUTION PLATE FOR USA 994-532 MACHINE SCREW (W/SP. WASHER) M3X5 319-906 DC-SPEED CONTROL SWITCH 316-166 PUSHING BUTTON HITACHI LABEL 320-378 HOOK ASS’Y INCLUD.35 320-288 V-LOCK NUT M5 306-952 STRAP (BLACK) 319-926 HOOK SPRING 319-927...
  • Page 40 STANDARD ACCESSORIES WR 9DM ITEM CODE NO. DESCRIPTION REMARKS USED CHARGER (MODEL UC 14YF2) 320-377 CASE OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 996-125 HEX. SOCKET ASS’Y 8MMX33L INCLUD.602,603 996-124 SOCKET PIN (A) 873-095 O-RING (P-16) 996-126 HEX. SOCKET ASS’Y 10MMX33L INCLUD.602,603 996-127 HEX.
  • Page 41 WR 9DM ITEM CODE NO. DESCRIPTION REMARKS USED --- 4 --- 10 -- 01 Printed in Japan (011025N)

This manual is also suitable for:

Wr 9dm

Table of Contents