Makita DTW281 Instruction Manual

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Contents

Makita DTW281 Instruction Manual Manual pdf 9 page image

90High tensile boltN mFastening torqueFastening time (S)Proper fastening torque1.0 2.0 3.0M12HM14HM16HM12HM14HM16H280(207)240(177)200(148)160(118)120(89)80(59)40(30)014828NOTE:• Hold the tool pointed straight at the bolt or nut.• Excessive fastening torque may damage thebolt/nut or socket. Before starting your job, alwaysperform a test operation to determine the properfastening time for your bolt or nut.• If the tool is operated continuously until the batterycartridge has discharged, allow the tool to rest for15 minutes before proceeding with a fresh batterycartridge.The fastening torque is affected by a wide variety offactors including the following. After fastening, alwayscheck the torque with a torque wrench.1. When the battery cartridge is discharged almostcompletely, voltage will drop and the fasteningtorque will be reduced.2. Socket• Failure to use the correct size socket willcause a reduction in the fastening torque.• A worn socket (wear on the hex end or squareend) will cause a reduction in the fasteningtorque.3. Bolt• Even though the torque coefficient and theclass of bolt are the same, the properfastening torque will differ according to thediameter of bolt.• Even though the diameters of bolts are thesame, the proper fastening torque will differaccording to the torque coefficient, the classof bolt and the bolt length.4. The use of the universal joint or the extension barsomewhat reduces the fastening force of theimpact wrench. Compensate by fastening for alonger period of time.5. The manner of holding the tool or the material ofdriving position to be fastened will affect thetorque.6. Operating the tool at low speed will cause areduction in the fastening torque.MAINTENANCECAUTION:• Always be sure that the tool is switched off and thebattery cartridge is removed before attempting toperform inspection or maintenance.• Never use gasoline, benzine, thinner, alcohol orthe like. Discoloration, deformation or cracks mayresult.To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should beperformed by Makita Authorized or Factory ServiceCenters, always using Makita replacement parts.OPTIONAL ACCESSORIESCAUTION:• These accessories or attachments arerecommended for use with your Makita toolspecified in this manual. The use of any otheraccessories or attachments might present a risk ofinjury to persons. Only use accessory orattachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• Sockets• Extension bar• Universal joint• Bit adapter• Makita genuine battery and chargerNOTE:• Some items in the list may be included in the toolpackage as standard accessories. They may differfrom country to country.