... equipment parts2. Material: steel, copper, brass, aluminum, nonferrous metal alloy, hard alloy,and high-density alloy, etc.3. ... speed engraving machine, common machines, laser engraving machines, metal injection machine4. Precision machining capability: a) Machine's rotating speed: ... 5,000rpm - 30,000rpm b) Machining precision tolerance: 0.005 - 0.01mm c) Roughness value: < ...