Amorphous Diamond Speeds and Feeds Chart

Suggested Speeds and Feeds for Graphite

Machining Parameters:
Starting conditions vary considerably. 2,000 sfm and 0.004" (.01mm) per flute per revolution is a conservative starting point for 1/4" (6mm) and larger end mills.

Definitions:
rpm = revolutions per minute
sfm = surface feet per minute
m/min = meters per minute
fpt = feed per tooth (feed per cutting edge/flute) in inches or mm
Feed per revolution (fpr) = feed rate (fpt) x no. of teeth (flutes)
Feed per minute (fpm) = fpr x rpm