Gear reducer - grinding gears gear reducer precision is the overall shape of gear errors divided one level, including tooth, tooth direction, diameter jumping and other important parameters, which refers to the radial teeth tooth shape, tooth refers to longitudinal shape teeth diameter jump is defined as the error distance of two adjacent teeth, generally we automotive gear hobbing processing is completed by 6 to 7 can be used, and some of the press due to the need for speed operation and batch printing, it requires high-precision gears in order to reduce the accumulated gear error leaving the printing effects caused by decline, while domestic production of grinding can be processed to level 4-5, imported high-precision grinding machine processable to 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 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 mold Number of gears (not including displacement gear). Modulus indicates 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 we look forward to working with you! Shenzhen OECD Gear Machinery Co., Ltd. | gear reducer - Gear grinding machine