Self-centering holders are suitable for knurling diamond patterns in CNC or manual lathes. The pivoting head floats to align with the part to be rolled. This popular type of tool is simple to use and is adequate for many applications. Carbide pins and hex wrench are included. Knurls are not included. NOTE: The adjustable straddle types have an advantage that should be considered - adjusting the knurls to contact the work top and bottom greatly reduces side pressure. This reduces the load on the lead-screw on your machine, and allows rolling longer parts. Also, one knurl may tend to roll deeper than the other, producing a "chisel" diamond on larger parts with this type of holder.

CARBIDE KNURL PINS