Impact Wrench

WR 22SA

HANDLING INSTRUCTIONS

Read through carefully and understand these instructions before use.

001Cover_WR22SA_ChS.p65J 13.6.12, 9:19 AM1

1

3

9

17

5

8

61 2

3 4

02 4 6 8 10

50

60

70

80

00

500

40 400

30 300

600

700

800kg-m N·m

(s)

M22 × 70 (F 10T)

B

C

A

2

34

5

0

00Table_WR22SA_ChS.p65J 13.6.12, 9:20 AM1

2

Symbols

WARNING

The following show symbols used for themachine. Be sure that you understand theirmeaning before use.

To reduce the risk of injury, user must readinstruction manual.

1

2

3

4

5

6

7

8

9

0

A

B

C

Pin O-Ring typePinHex. socketRingAnvil

Plunger typeHolePlungerSpringSwitchRating

Tightening timeTightening torque

00Table_WR22SA_ChS.p65J 13.6.12, 9:20 AM2

3

01ChS_WR22SA_ChS.P65J 13.6.12, 9:20 AM3

4

•

01ChS_WR22SA_ChS.P65J 13.6.12, 9:20 AM4

5

22232426272930323536

S22232426272930323536

D32384042434547505255

E32292929292929292929

L60555555555555555555

S

232426272930323536

D

333438394243465255

E

323257575757727272

L60608585858585100100100

S

D B

E

L

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01ChS_WR22SA_ChS.P65J 13.6.12, 9:20 AM5

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01ChS_WR22SA_ChS.P65J 13.6.12, 9:21 AM6

7

01ChS_WR22SA_ChS.P65J 13.6.12, 9:21 AM7

8

GENERAL POWER TOOL SAFETY WARNINGS

WARNING

Read all safety warnings and all instructions.Failure to follow the warnings and instructions may resultin electric shock, fire and/or serious injury.

Save all warnings and instructions for future referenc.The term “power tool” in the warnings refers to yourmains-operated (corded) power tool or battery-operated(cordless) power tool.1) Work area safety

a) Keep work area clean and well lit.Cluttered or dark areas invite accidents.

b) Do not operate power tools in explosiveatmospheres, such as in the presence of flammableliquids, gases or dust.Power tools create sparks which may ignite thedust or fumes.

c) Keep children and bystanders away whileoperating a power tool.Distractions can cause you to lose control.

2) Electrical safetya) Power tool plugs must match the outlet.

Never modify the plug in any way.Do not use any adapter plugs with earthed(grounded) power tools.Unmodified plugs and matching outlets will reducerisk of electric shock.

b) Avoid body contact with earthed or groundedsurfaces, such as pipes, radiators, ranges andrefrigerators.There is an increased risk of electric shock if yourbody is earthed or grounded.

c) Do not expose power tools to rain or wetconditions.Water entering a power tool will increase the riskof electric shock.

d) Do not abuse the cord. Never use the cord forcarrying, pulling or unplugging the power tool.Keep cord away from heat, oil, sharp edges ormoving parts.Damaged or entangled cords increase the risk ofelectric shock.

e) When operating a power tool outdoors, use anextension cord suitable for outdoor use.Use of a cord suitable for outdoor use reduces therisk of electric shock.

f) If operating a power tool in a damp location isunavoidable, use a residual current device (RCD)protected supply.Use of an RCD reduces the risk of electric shock.

3) Personal safetya) Stay alert, watch what you are doing and use

common sense when operating a power tool.Do not use a power tool while you are tired orunder the influence of drugs, alcohol or medication.A moment of inattention while operating powertools may result in serious personal injury.

b) Use personal protective equipment. Always weareye protection.Protective equipment such as dust mask, non-skidsafety shoes, hard hat, or hearing protection used forappropriate conditions will reduce personal injuries.

c) Prevent unintentional starting. Ensure the switchis in the off-position before connecting to powersource and/or battery pack, picking up or carryingthe tool.

Carrying power tools with your finger on the switchor energising power tools that have the switch oninvites accidents.

d) Remove any adjusting key or wrench beforeturning the power tool on.A wrench or a key left attached to a rotating part ofthe power tool may result in personal injury.

e) Do not overreach. Keep proper footing and balanceat all times.This enables better control of the power tool inunexpected situations.

f) Dress properly. Do not wear loose clothing orjewellery. Keep your hair, clothing and glovesaway from moving parts.Loose clothes, jewellery or long hair can be caughtin moving parts.

g) If devices are provided for the connection of dustextraction and collection facilities, ensure theseare connected and properly used.Use of dust collection can reduce dust relatedhazards.

4) Power tool use and carea) Do not force the power tool. Use the correct

power tool for your application.The correct power tool will do the job better andsafer at the rate for which it was designed.

b) Do not use the power tool if the switch does notturn it on and off.Any power tool that cannot be controlled with theswitch is dangerous and must be repaired.

c) Disconnect the plug from the power source and/or the battery pack from the power tool beforemaking any adjustments, changing accessories,or storing power tools.Such preventive safety measures reduce the riskof starting the power tool accidentally.

d) Store idle power tools out of the reach of childrenand do not allow persons unfamiliar with the powertool or these instructions to operate the power tool.Power tools are dangerous in the hands of untrainedusers.

e) Maintain power tools. Check for misalignment orbinding of moving parts, breakage of parts andany other condition that may affect the powertool’s operation.If damaged, have the power tool repaired before

use.Many accidents are caused by poorly maintainedpower tools.

f) Keep cutting tools sharp and clean.Properly maintained cutting tools with sharp cuttingedges are less likely to bind and are easier tocontrol.

g) Use the power tool, accessories and tool bits etc.in accordance with these instructions, taking intoaccount the working conditions and the work tobe performed.Use of the power tool for operations different fromthose intended could result in a hazardous situation.

5) Service

a) Have your power tool serviced by a qualified repairperson using only identical replacement parts.This will ensure that the safety of the power tool ismaintained.

PRECAUTION

Keep children and infirm persons away.When not in use, tools should be stored out of reach of

children and infirm persons.

02Eng_WR22SA_ChS.P65E 6/12/13, 9:578

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PRECAUTIONS ON USING IMPACT WRENCH

1. Hold power tool by insulated gripping surfaces,when performing an operation where the fastenermay contact hidden wiring or its own cord. Fastenerscontacting a "live" wire may make exposed metalparts of the power tool "live" and could give theoperator an electric shock.

2. When using the tool at a hight, make sure that thereis nobody below.

3. Use earplugs if using for a long time use.4. Switch the reversing switch only after the motor

has stoped when it is necessary to change thedirection of the rotation.

5. Use a step up transformer when a long extensioncable is used.

6. Confirm the tightening torque by a torque wrenchbefore use in order to assertain the correct tighteningtorque to be used.

7. Assemble the socket securely to the impact wrenchwith the socket pin and ring.

8. Confirm whether the socket has any cracks in it.9. Always hold the body and side handles of the

impact wrench firmly. Otherwise the counterforceproduced may result in inaccurate and evendangerous operation.

STANDARD ACCESSORIES

(1) Side handle ............................................................... 1(2) Case ........................................................................... 1Standard accessories are subject to change without notice.

OPTIONAL ACCESSORIES(sold separately)

1. Variety of socketsAlthough the Hitachi Impact Wrench is deliveredwith only one standard socket, ample sockets areavailable to cover impact tightening of various sizesand types of bolts.

SPECIFICATIONS

Voltage (by areas)* (110V, 115V, 120V, 127V, 220V, 230V, 240V)

Power input* 800 WNo load speed 1800 / min

Capacities (size of bolts)M16 - M22 (High tension bolt)

M14 - M24 (Ordinary bolt)Tightening torque** Maximum 610N·m (62.2 kg-m)Angle drive 19 mmWeight (without cord) 4.8 kg

*Be sure to check the nameplate on product as it is subject to change by areas.**Tightening the bolt without extension cord at rated voltage.

S

D B

E

L

Table 1 B = 19 mm

SocketOrdinary Socket Long Socket

DesignationDimension (mm) Dimension (mm)

Hex. Socket 2223242627293032

3536

E

323257575757727272

D

333438394243465255

S

23242627

2930323536

L6055555555

5555555555

E3229292929

2929292929

D3238404243

4547505255

S2223242627

2930323536

L

606085858585100100100

02Eng_WR22SA_ChS.P65E 6/12/13, 9:579

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2. Extension bar

The extension bar is convenient for working in veryrestricted spaces or when the socket provided cannotreach the bolt to be tightened.

CAUTION

When the extension bar is used the tightening torqueis reduced slightly compared with the ordinarysocket. So it is necessary to operate the tool a littlelonger to get the same torque.

3. Universal jointThe universal joint is convenient for impacting nutswhen there is an angle between the socket andwrench, or when working in a very narrow space.

Optional accessories are subject to change without notice.

APPLICATIONS

� Tightening and loosening various kinds of bolt andnut.

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conformsto the power requirements specified on the productnameplate.

2. Power switch

Ensure that the power switch is in the OFF position.If the plug is connected to a receptacle while thepower switch is in the ON position, the power toolwill start operating immediately, which could causea serious accident.

3. Extension cord

When the work area is removed from the powersource, use an extension cord of sufficient thicknessan rated capacity. The extension cord should bekept as short as practicable.

4. Fixing the side handle

The position of the side handle attached to thehammer case can be changed by unscrewing thehandle. (Right hand screw) Turn the handle to thedesired position for the job and secure the handleby screwing up tight.

5. Mounting the socket

(1) Pin, O-ring type (Fig. 1)

Select a socket matched to the bolt to be tightenedor loosened. Insert the socket on the anvil of thewrench, and secure it with the pin and ring. Whendismantling the socket, reverse the sequence.

(2) Plunger type (Fig. 2)

Align the plunger located in the square part of theanvil with the hole in the hex socket. Then pushthe plunger, and mount the hex socket on the anvil.Check that the plunger is fully engaged in the hole.When removing the socket, reverse the sequence.

HOW TO USE

1. Operation of switch (Fig. 3)

The switch in this machine functions as a motorswitch and rotational direction selector switch. Whenthe switch is set to R indicated on the handle cover,the motor rotates clockwise to tighten the bolt.When the switch is set to L, the motor rotatescounterclockwise to loosen the bolt. When the switchis released, the motor stops.

CAUTION

Be sure to turn the switch OFF and wait until themotor completely stops before changing thedirection of wrench revolution. Switching while themotor is rotating will result in burning the motor.

2. Tightening and loosening boltsA hex socket matching the bolt or nut must firstbe selected. Then mount the socket on the anvil,and grip the nut to be tightened with the hex socket.Holding the wrench in line with the bolt, press thepower switch to impact the nut for several seconds.If the nut is only loosely fitted to the bolt, the boltmay turn with the nut, therefore preventing propertightening. In this case, stop impact on the nut andhold the bolt head with a wrench before restartingimpact, or manually tighten the bolt and nut toprevent them slipping.

OPERATIONAL CAUTIONS

1. Confirm the line voltage (Fig. 4)

The available tightening torque is influenced by linevoltage. Reduced line voltage lowers the availabletightening torque.For example, if you use a 220 V type wrench ona 200 V line the available tightening torque will bereduced to 70 to 90 %. When extending the powercord, use an extension cord which is as short aspossible. When the line voltage is low and a longextension cord is needed a step up transfomershould be used. The relation between the line voltageand the tightening torque are shown in the figures.

2. Do not touch the bumper or hammer case during

continuous operation

The bumper and hammer case become hot duringcontinuous screw tightening so be careful not totouch them at that time.

3. Work at a tightening torque suitable for the boltunder impact

The optimum tightening torque for nuts and boltsdiffers with material and size of the nuts and bolts.An excessively large tightening torque for a smallbolt may strech or break the bolt. The tighteningtorque increases proportionally to the operatingtime. Use the correct operating time for the bolt.

4. Selecting the socket to be matched to the bolt

Be sure to use a socket which is matched to thebolt to be tightened. Using an improper socket willresult not only in insufficient tightening but also indamage to the socket or nut.A worn or deformed hex or square-holed socket willnot give an adequate tightness for fitting to the nutor anvil, consequently resulting in loss of tighteningtorque.Pay attention to wear of socket holes, and replace

02Eng_WR22SA_ChS.P65E 6/12/13, 9:5710

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before further wear developes. Matching socket andbolt sizes are shown in Table 1.The numerical value of a socket designation denotesthe side to side distance (S) of its hex hole.

5. Holding the tool

Hold the Impact Wrench firmly with both hands bythe body handle and the side handle. In this casehold the wrench in line with the bolt.It is not necessary to push the wrench very hard.Hold the wrench with a force just sufficient tocounteract the impact force.

6. Confirm the tightening torqueThe following factors contribute to a reduction ofthe tightening torque. So confirm the actualtightening torque needed by screwing up somebolts before the job with a hand torque wrench.Factors affecting the tightening torque are as follows.

(1) Line voltage:The tightening torque decreases when the linevoltage becomes low (See Fig. 4).

(2) Operating time:The tightening torque increases when the operatingtime increases. But the tightening torque does notincrease above a certain value even if the tool isdriven for a long time (See Fig. 4).

(3) Diameter of bolt:The tightening torque differs with the diameter ofthe bolt as shown in Fig. 4. Generally a largerdiameter bolt has a larger tightening torque.

(4) Tightening conditions:The tightening torque differs according to the torqueratio; class, and length of bolts even when boltswith the same size threads are used. The tighteningtorque also differs according to the condition of thesurface of metal through which the bolts are to betightened.

(5) Using optional parts:The tightening torque is reduced a little when anextension bar, universal joint or a long socket isused.

(6) Clearance of the socket:A worn or deformed hex or a square-holed socketwill not give an adequate tightness to the fittingbetween the nut or anvil, consequently resulting inloss of tightening torque.Using an improper socket which does not matchto the bolt will result in an insufficient tighteningtorque. Matching socket and bolt sizes are shownin Table 1.

MAINTENANCE AND INSPECTION

1. Inspecting the socketA worn or deformed hex or a square-holed socketwill not give an adequate tightness to the fittingbetween the nut or anvil, consequently resulting inloss of tightening torque. Pay attention to wear ofsocket holes periodically, and replace with a newone if needed.

2. Inspecting the mounting screws

Regularly inspect all mounting screws and ensurethat they are properly tightened. Should any of thescrews be loose, retighten them immediately. Failureto do so could result in serious hazard.

3. Maintenance of the motor

The motor unit winding is the very “heart” of thepower tool.Exercise due care to ensure the winding does notbecome damaged and/or wet with oil or water.

4. Inspecting the carbon brushesFor your continued safety and electrical shockprotection, carbon brush inspection and replacementon this tool should ONLY be performed by a HitachiAuthorized Service Center.

5. Replacing supply cord

If the supply cord of Tool is damaged, the Toolmust be returned to Hitachi Authorized ServiceCenter for the cord to be replaced.

6. Service parts listA: Item No.B: Code No.C: No. UsedD: Remarks

CAUTION

Repair, modification and inspection of Hitachi PowerTools must be carried out by a Hitachi AuthorizedService Center.This Parts List will be helpful if presented with thetool to the Hitachi Authorized Service Center whenrequesting repair or other maintenance.In the operation and maintenance of power tools,the safety regulations and standards prescribed ineach country must be observed.

MODIFICATIONHitachi Power Tools are constantly being improvedand modified to incorporate the latest technologicaladvancements.Accordingly, some parts (i.e. code numbers and/ordesign) may be changed without prior notice.

NOTEDue to HITACHI’s continuing program of research anddevelopment, the specifications herein are subject tochange without prior notice.

02Eng_WR22SA_ChS.P65E 6/12/13, 9:5711

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AB

CD

3993

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31

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03Back_WR22SA_ChS.P65E 6/12/13, 9:5613

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03Back_WR22SA_ChS.P65E 6/12/13, 9:5614

312Code No. C99137623 NPrinted in Japan

Hitachi Koki Co., Ltd.

001Cover_WR22SA_ChS.p65J 13.6.12, 9:19 AM2