... 4.finish&Heat treatment worm gear for servo motor Specifications:1) Suitable for various automotive, electronic, telecommunications, mechanical ... Mitutoyo concentric circles, optical projectors, Mitutoyo fineness instruments for inspection, EDM, high speed CNC machine, Sodick wire ... as requirements6)Material: iron/aluminum, copper, alloy, carbon steel, 18CrMnTi,20CrMnTi,20Cr,20CrV,1045 steel, others ...