Makita TW0200 Instruction Manual

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Contents

8OPERATIONThe proper fastening torque may differ depending upon thekind or size of the bolt, the material of the workpiece to befastened, etc. The relation between fastening torque and fas-tening time is shown in the figures.Hold the tool firmly and place the socket over the bolt or nut.Turn the tool on and fasten for the proper fastening time.NOTE:• When fastening screw M10 (3/8”) or smaller, carefullyadjust pressure on the switch so that the screw is notdamaged.• Hold the tool pointed straight at the bolt or nut withoutapplying excessive pressure on the tool.• If you fasten the bolt for a time longer than shown in thefigures, the bolt or the socket may be overstressed,damaged, etc. Before starting your job, always perform atest operation to determine the proper fastening time foryour bolt. Especially for the bolt over than M10 (3/8”),perform the above test operation to prevent the troubleon socket or bolt, etc.The fastening torque is affected by a wide variety of factorsincluding the following. After fastening, always check thetorque with a torque wrench.1. Voltage• Voltage drop will cause a reduction in the fasteningtorque.2. Socket• Failure to use the correct size socket will cause areduction in the fastening torque.• A worn socket (wear on the hex end or square end)will cause a reduction in the fastening torque.3. Bolt• Even though the torque coefficient and the class ofbolt are the same, the proper fastening torque willdiffer 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 boltlength.200180160140120100806040200 1 2 3 4M12M16M16X80M12X80M10X80Standard boltFastening torque (N.m)Fastening time (S)(5/8”X3-1/8”)(1/2”X3-1/8”)(5/16”X3-1/8”)(5/8”)(1/2”)M10(3/8”)004236200180160140120100806040200 1 2 3 4 5M10M12M12X80M10X80High tensile boltFastening torque(N.m)Fastening time (S)(1/2”X3-1/8”)(3/8”X3-1/8”)(1/2”)(3/8”)004237