Metal cutting nibbler

This is a portable nibbler which uses a punch and die (Figure 3.47). The actual cutting is done by the edge of the punch which is reciprocated at high speed,leaving a slot or channel in the metal. Cutting can be commenced from the panel edge,or from a hole predrilled in the panel surface to allow entry of the punch. Allowances must be made for the width of the cut and,when accurate positioning of the cut is essential,templates can be used as a guide.