Rods and Blocks
For Glass, Mica, and highly Mineral filled materials the above speeds should be reduced to about 100 surface feet per minute (or about 1/4 of the above RPM’s).
Cutting angles for turning (lathe or automatic screw machines are:
- 10 degrees Negative rake angle
- Work clearance about 35 degrees
- Side clearance about 15 to 20 degrees
- Rough cuts up to 1/16 deep — finish cuts about .010 deep Feed .005″ to .010″ per revolution