Modulus is refers to between adjacent two ipsilateral tooth profile of gear tooth pitch t and the ratio of PI ( m = t /π) That is an unit with mm. Modulus is a modular system gear zui basic parameters. The higher the modulus, the greater the tooth also more thick, if the number of teeth on the gears, the radial size of the round. Module series standard is according to the design, manufacture and inspection requirements. With the straight tooth gear, modulus of subsidies to the modulus of mn, the difference between the transverse module ms and axial modulus mx, they are in their respective pitch ( Normal pitch, end pitch and axial pitch) And the ratio of PI, are in mm. For bevel gear, the module has a big end module me, average modulus modulus of m1 in mm and small end. For the cutting tool, has the corresponding tool module mo, etc. It is widely used standard module. In the metric system of gear transmission, worm drive, synchronous toothed belt drive and ratchet wheel, gear coupling, spline parts, standard modulus is a zui basic parameters. Formula of gear: dividing circle diameter d = modulus of mz m z teeth GB1357 - according to the national standards 87, the module of gear ( m） Diyi series: 1, 1. 25, 1. 5, 2, 2. 5, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50. The module of gear ( m） The second series: 1. 75, 2. 25, 2. 75, ( 3. 25) , 3. 5, ( 3. 75). , 4. 5, 5. 5, ( 6. 5) , 7, 9, ( 11) , 14, 18, 22, 28, 30, 45. The module (in brackets m） Try not to choose. This article by the imported original three guinness sanjiaodai rubber v-belts, reprint please indicate the copyright: http://www. lilainuo。 com