Diamond update
bill tindall
>We have been experimenting with various finishes for diamond plates. A surface resulting from a milling machine taking a fine cut was evaluated. This surface would be cheap to create which is why we tried it. It didn't cut well when used with 1 micron diamond compared to a surface ground plate. I think it was too rough. It was densly micro- pitted, perhaps where the tool yanked particles (carbides) out of the surface.
However, this surface performed adequately with a coarser grit, 15 micron. I made some 1 x 6 hones to be used sharpening lathe tools. Charged with 15 micron diamond the milling machined surface cut M4 tool steel well.