Conventional "bump" knurling methods are undesirable for smaller diameter parts because the forces deflect the workpiece, according to Genevieve Swiss Industries Inc., Westfield, Mass. To control this problem, the company recommends using a straddle knurl holder to provide support to the workpiece while the knurling operation is performed.

Low profile straddle knurling holders are adjustable to accomodate a range of part diameters.

Specifically designed for Swiss-type machines, the low profile straddle knurl holders from Genevieve Swiss are said to keep interference to a minimum within the tooling layout of most machines while enabling use of adjacent tool positions to maximize tooling capacity.

The holders are suitable for machines such as Citizen, Star, Tsugami, Tornos, Hanwha as well as Ganesh turning centers.