Synchronous Pulley
2026-07-08
Workpiece material: Powder metallurgy (PM) material.
Operation: Finish turning of the large end face and inner bore.
Due to the porosity and the presence of hard particles in the PM material, the cutting edge experiences rapid wear. Previously, PCBN (polycrystalline cubic boron nitride) inserts were used, but the tool life was only 70–80 pieces per edge.
Currently, PCD (polycrystalline diamond) inserts, type DCGW11T304, are employed with the following cutting parameters:
Cutting speed *v* = 150 m/min
Feed rate F = 0.1 mm/r
Depth of cut ap = 0.2 mm
Surface roughness requirement: Ra < 0.8 μm
Under these conditions, the tool life has been increased to 300 pieces per edge.
