We have been able to significantly improve the surface finish with a modified lead geometry.
With a normal face and should mill, a Ra value of 1,2 µm was achieved, while the Ra value is 0,03 µm with the hpcCUT.
The cutting where not changed:
Both tools: Diameter 63 mm, HSK 63, Z = 14, PCD brazed
n = 12000 1/min
vf = 5000 mm/min
ap = 0,2 mm
ae = 60 mm