Details, Fiction and Audemars Piguet
Each ought to work. You will likely need to sharpen much more usually with HSS. But, I manufactured about a dozen blanks for bezels from 40mm bar, turning do the job was with carbide, but utilised HSS for parting off, and acquired all 12 parted with no sharpening the cut off blade, and experienced to touch up my carbide quite a few moments, which m