Non-calibration gear precision gear manufacturer refers to the shape of the overall error of the gear divided one level, including some important parameters tooth, tooth, runout, etc., which refers to the radial shape of the tooth is teeth, tooth refers to the shape of the vertical tooth diameter jump distance is defined as the error of two adjacent teeth, generally we automotive gear hobbing process can be completed, you can use 6 to 7, and some printers due to the need for high-speed operation and batch printing, precision gear they need to reduce the accumulated error of leaving the printing effects caused by the decline in gear, while domestic production of grinding can be processed to level 4-5, imported high-precision grinding machine processable to 3, grade 3-4, and some can be processed to two. The Japanese standard DIN 0 Grade 4 Grade equivalent Chinese judge, usually in units of error in μm, 1μm = 0.001mm diameter calculation tip diameter = (number of teeth + 2ha *) * modulus pitch circle diameter = number of teeth * mold Number of root diameter = (number of teeth -2ha * -2 * hc *) * modulus for standard gear: ha * = 1, hc * = 0.25; the other to take such other non-standard gear: M4, 32 tooth tip diameter = (32 + 2 * 1) * 4 = 136mm pitch diameter = 32 * 4 = 128mm root diameter = (32-2 * 1-2 * 0.25) * 4 = 118mm this calculation method for all die gear (not including the displacement gear). Modulus represents the size of the gear teeth. Gear modulus = pitch diameter gear teeth modulus ÷ choose gear modulus national standards GB1357-78. Manufacturers of home, you can build all kinds of models, cheap, large concessions. Sincerely look forward to working with you! Shenzhen OECD Gear Machinery Co. | non-calibration gear manufacturer