What is the content of standard gear modulus table?

According to China's standard involute gear, if the modulus is 1mm, the tooth top height is 1mm, and the tooth root height is1.25mm. Thus, the larger the modulus, the greater the number of teeth of the gear.

According to the national standard GB 1357- 1987, there are 49 kinds of modulus, including modulus 1, modulus 1.25, modulus 1.5, modulus 2, modulus 2.5, modulus 3, modulus 4 and modulus 5.

Extended data:

Precautions:

If the number of teeth of the gear is fixed, the larger the modulus, the larger the radial dimension of the wheel. Modular series standards are formulated according to the requirements of design, manufacture and inspection. For spur gears, there are differences among normal module mn, end-face modulus ms and axial modulus mx, which are all based on the ratio of their respective pitches (normal pitch, end-face pitch and axial pitch) to pi, also in millimeters.

For bevel gears, the modulus can be divided into big end modulus me, average modulus mm and small end modulus m 1. For tools, there are corresponding tool modules. Standard modulus is widely used. In metric gear transmission, worm transmission, synchronous toothed belt transmission, ratchet, gear coupling, spline and other parts, the standard modulus is a basic parameter.

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