Hold the tool firmly and place the point of the driver bit in the screw head. Apply for- ward pressure to the tool to the extent that the bit will not slip off the screw and turn the tool on to start operation.
NOTE :
Use the proper bit for the head of the screw that you wish to use.
Hold the tool pointed straight a t the screw.
If you tighten the screw for a time longer than shown in the figures above, the screw or the point of the driver bit may be overstressed, stripped, damaged, etc. Before starting your job, always perform a test operation to determine the proper tightening time for your screw. When tightening a standard screw in a steel plate, the proper tightening torque can be obtained in an extremely short time (approx. 0.1 - - 0.2 seconds). Turn the tool off as soon as the impact sound is heard.
The tightening torque is affected by a wide variety of factors including the following. After tightening, always check the torque with a torque wrench.
1.When the battery cartridge is discharged almost completely, voltage will drop and the tightening torque will be reduced.
2.Driver bit or socket bit
*Failure to use the correct size driver bit or socket bit will cause a reduction in the tightening torque.
3.Bolt
Even though the torque coefficient and the class of bolt are the same, the proper tightening torque will differ according to the diameter of bolt.
*Even though the diameters of bolts are the same, the proper tightening torque will differ according to the torque coefficient, the class of bolt and the bolt length.
4.The manner of holding the tool or the material of driving position to be tightened will affect the torque.
CAUTION :
If the tool is operated continuously until the battery cartridge has discharged, allow the tool to rest for 15 minutes before proceeding with a fresh battery.
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