Makita DTD172 Instruction Manual

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14 ENGLISHTo remove the driver bit, pull the sleeve in the directionof the arrow and pull the driver bit out.NOTE: If the driver bit is not inserted deep enoughinto the sleeve, the sleeve will not return to its originalposition and the driver bit will not be secured. In thiscase, try re-inserting the bit according to the instruc -tions above.NOTE: When it is difficult to insert the driver bit, pullthe sleeve and insert it into the sleeve as far as it willgo.NOTE: After inserting the driver bit, make sure that itis firmly secured. If it comes out, do not use it.Installing hookCAUTION: When installing the hook, alwayssecure it with the screw firmly. If not, the hookmay come off from the tool and result in the personalinjury.CAUTION: Use the hanging/mounting partsfor their intended purposes only. Using for unin-tended purpose may cause accident or personalinjury.► Fig.15: 1. Groove 2. Hook 3. ScrewThe hook is convenient for temporarily hanging the tool.This can be installed on either side of the tool. To installthe hook, insert it into a groove in the tool housing oneither side and then secure it with a screw. To remove,loosen the screw and then take it out.OPERATION► Fig.16The proper fastening torque may differ depending uponthe kind or size of the screw/bolt, the material of theworkpiece to be fastened, etc. The relation between fas-tening torque and fastening time is shown in the figures.Proper fastening torque for standard boltN•m(kgf•cm)M14M12M10M8M16M14M12M10M8M16140(1428)(1224)(1020)(816)(612)(408)(204)120100806040200 12121. Fastening time (second) 2. Fastening torqueProper fastening torque for high tensile bolt21M14M12M14M12M10M8M10M8200180160140120100806040200 1 2 3(2040)(1836)(1632)(1428)(1224)(1020)(816)(612)(408)(204)N•m(kgf•cm)1. Fastening time (second) 2. Fastening torqueHold the tool firmly and place the point of the driver bit in the screwhead. Apply forward pressure to the tool to the extent that the bitwill not slip off the screw and turn the tool on to start operation.NOTICE: If you use a spare battery to continuethe operation, rest the tool at least 15 min.NOTE: Use the proper bit for the head of the screw/bolt that you wish to use.NOTE: When fastening M8 or smaller screw, choosea proper impact force and carefully adjust pressure onthe switch trigger so that the screw is not damaged.NOTE: Hold the tool pointed straight at the screw.NOTE: If the impact force is too strong or you tightenthe screw for a time longer than shown in the figures,the screw or the point of the driver bit may be over -stressed, stripped, damaged, etc. Before starting yourjob, always perform a test operation to determine theproper fastening time for your screw.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. Driver bit or socket bitFailure to use the correct size driver bit or socketbit 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 thesame, the proper fastening torque will differaccording to the torque coefficient, the classof bolt and the bolt length.4. The manner of holding the tool or the material ofdriving position to be fastened will affect the torque.5. Operating the tool at low speed will cause a reduc-tion in the fastening torque.