Light duty interchangeable punches are standard in round, oblong, square and rectangular shapes with punches available in 6.3 mm to 25.0 mm overall diameter shank sizes. Size of the locking ball in the retainer, ranges from 6.0 mm to 10.0 mm diameter. The light duty series will pierce up to 3.2 mm stock. Heavy duty interchangeable punches are standard in round, oblong, square and rectangular shapes, with punches available in 13.0 mm to 32.0 mm overall diameter shank sizes. Size of the locking ball in the retainer is 12.0 mm diameter.

NOTE The heavy duty series generally will pierce up to 9.0 mm stock in all but a few of the larger sizes.

Dimensions for basic ball-lock light and heavy duty punches.

The purposes for which these ridges or teeth can be used are as follows:

1. Ornamentation.
2. To provide a hand or finger grip.
3. To provide for fixture, location or interference, on non-precision or un-important assemblies, and the keying of inserts in castings and plastic mouldings.

Other types of knurling wheels, intended for any operations requiring greater precision than is necessary to produce the types of knurling given above, and those manufactured for use on components of unusual form, are not covered by the requirements of this British Standard, except that examples are given, together with a recommendation that they comply with the requirements for material and hardness; the clauses relating to dimensions and limits of tolerance on manufacture do not apply to these other types.

Dimensions, material, marking requirements for straight helical and diamond toothed wheels. Component diameters for given wheel sizes. Forms of wheel, knurling operations.