Air power chisel

This tool (Figure 3.43) is designed for the removal of damaged panels so that essential stripping can be carried out easily and quickly. It consists of a chisel bit which is retained by a spring through one end of a barrel,and a piston which moves to and fro within the barrel,striking the end of the chisel bit as it does so. The barrel must be kept dirfree to eliminate the possibility of undue wear by the reciprocating movement of the chisel. A feather- action trigger in the handle allows for variation in the strength of the blow according to the amount of pressure applied. To provide additional safety a beehive or volute spring is fitted over the end of the barrel to prevent the chisel leaving the tool accidentally.
A wide range of special chisel bits is produced for the power tool. Most of these are cutting chisels of various sizes,used for general dismantling, cutting rivets,nuts,bolts and the removal of spotwelded sections. There is also a special thin-gauge metal cutting chisel for use on panel work,and a recessing tool which can be fitted on the end of the chisel. The recessing tool can be used on the edges of panels to form a lip or joggled section so that one panel passes over the face of the other,forming a flush finish which is ideal for spot-weld connections and joints in panels.