Makita DTW190 Instruction Manual

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8 ENGLISHProper fastening torque for standard bolt1Nm(kgfcm)2020(200)40(410)60(610)80(820)100(1020)120(1220)140(1430)160(1630)180(1840)0 1 2 3M16M14M12M10M8M8M10M12M14M161. Fastening time (second) 2. Fastening torqueProper fastening torque for high tensile bolt10(100)30(310)50(510)70(710)90(920)110(1120)130(1330)00 1 2 312Nm(kgfcm)M12M10M8M10M12M81. Fastening time (second) 2. Fastening torqueNOTE: Hold the tool pointed straight at the bolt or nut.NOTE: Excessive fastening torque may damage the bolt/nut orimpact socket. Before starting your job, always perform a test oper-ation to determine the proper fastening time for your bolt or nut.NOTE: If the tool is operated continuously until the bat-tery cartridge has discharged, allow the tool to rest for 15minutes before proceeding with a fresh battery cartridge.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. Impact socket• Failure to use the correct size impact socketwill cause a reduction in the fastening torque.• A worn impact socket (wear on the hex end or squareend) will cause a reduction in the fastening torque.3. Bolt• Even though the torque coefficient and the classof bolt are the same, the proper fastening torquewill differ according to the diameter of bolt.• Even though the diameters of bolts are the same, theproper fastening torque will differ according to thetorque coefficient, the class of bolt and the bolt length.4. The use of the universal joint or the extension bar some-what reduces the fastening force of the impact wrench.Compensate by fastening for a longer period of time.5. The manner of holding the tool or the material ofdriving position to be fastened will affect the torque.6. Operating the tool at low speed will cause a reduc-tion in the fastening torque.MAINTENANCECAUTION: Always be sure that the tool isswitched off and the battery cartridge is removed beforeattempting to perform inspection or maintenance.NOTICE: Never use gasoline, benzine, thinner,alcohol or the like. Discoloration, deformation orcracks may result.To maintain product SAFETY and RELIABILITY,repairs, any other maintenance or adjustment shouldbe performed by Makita Authorized or Factory ServiceCenters, always using Makita replacement parts.OPTIONAL ACCESSORIESCAUTION: These accessories or attachmentsare recommended for use with your Makita tool spec-ified in this manual. The use of any other accessoriesor attachments might present a risk of injury to persons.Only use accessory or attachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• Plastic carrying case• Tool hanger• Shoulder strap• Hook• Makita genuine battery and chargerNOTE: Some items in the list may be included in thetool package as standard accessories. They maydiffer from country to country.