Round Punches
Supplied in two different styles:

A: up to 2" or 50mm dia., these have a 9/16" dia. ground shank to fit punch holder type I. The punches are
machined with a small centre point for location in centre-punched marks. If the material has been pre-drilled
the punch can be supplied with a location pilot which is removable if necessary.

B: Over 2" or 50mm punches are made without shanks. These punches are bored with a centre hole through
which the screwed spigot of punch holder type K passes. A counter-bored recess in the punch accommodates a nut which locks the punch firmly to the holder. The punch is prevented from turning by a dowel in the face of the holder, which locates in the back of the punch. The centre point or pilot is screwed into the end of the spigot.

Shear: any punch being used for piercing can be supplied with a 'shear' type cutting edge which will extensively
reduce the tonnage requirement when punching material of heavier gauges.

Dies: these are made for economy in six standard outside diameters to suit the bolster outfit components.