The torque wrench is used to measure an objects resistance to turning and to provide precise tightening

Figure 2-9.Typical borescope.

of threaded fasteners. Figure 2-l1 shows three types of torque wrenches.

To use a torque wrench, first select the proper torque value for the torquing procedure you are using. Next,

Figure 2-10.A typical stroboscope.

Figure 2-11.Typical torque wrenches.

select the torque wrench with the correct capacity. The torque value should be in the second or third quarter of the wrenchs torque scale because the first and last quarters of the scale are not as accurate as the middle quarters.

Torque wrenches are precision tools. Handle them with care and always follow the manufacturers manual when you use them.