Specialized air drill

This is a hand-held clamp-type drilling tool designed for cutting out spot welds (Figure 3.54). It is powered by compressed air with controllable speeds,and has a removable cutting drill supplied in two sizes,6mm and 8mm; the depth of cut is also adjustable. When there is a flange at the rear of the spot weld it is supported by the clamping action of the C-shaped arm,while the drill is cutting out the spot weld to a preset depth,allowing the panels to separate. Owing to the shape and clamping action of the tool it is restricted to removing spot welds from an open panel edge only. Welds on panel edges which have no accessfrom the rear would entail the cutting of the panel to be replaced,to obtain access for the tool clamp.

This tool could be a worthy addition to any body shop because of its time saving over conventional methods and its neatness of finish.