1) Material: 42 CrNiMo, 40CrMn 2) Machine: sawtooth machine, milling machine, hobbing machine 3) Precision: IT6~8 Ra0.4~Ra0.8 4) Surface treatment: tooth face high-frequency quenching HRc 50~58 We specialize in cutting machining, and offer cutting service for you. We can make shafts, gears, lead screw, nut, coupling and other cutting parts, due to large machining center, CNC machine, milling machine, hobbing machine, grinding machine, precession internal grinding machine, precession cylindrical grinding machine, C614A C613A lathe, and the slitter from Japan. Precision is IT6 - IT4, surface roughness is Ra 1.25 - Ra 0.01μm. Materials can be carbon steel, stainless steel, titanium, casting article, nonmetallic material, and nonferrous metal (nylon, resin). Specifications of bar stock are φ2 x 5 to φ150 x 1,500mm. It is always our goal to provide satisfactory services to our customers with reasonable price, high quality products, accurate delivery time and all necessary assistance.