Gear data quantization

The modulus is what determines the size of the tooth. Gear modulus is defined as a basic parameter of modular gear gear, which is artificially abstracted to measure the scale of gear gear. The goal is to standardize gear cutting tools and reduce costs. The modules of straight, helical and bevel gears can be referred to the standard module series table.
With the continuous improvement of industrial development level, many customized mass production gears use non-standard modules, which weakens their significance.
If the number of teeth of the gear is fixed, the larger the modulus is, the larger the radial size of the wheel is. Module series standards are based on design, manufacturing and inspection requirements. For gears with non-straight teeth, the moduli are different from the normal moduli mn, the end moduli ms and the axial moduli mx. They are all based on the ratio of their respective pitch of teeth (the normal pitch of teeth, the end pitch of teeth and the axial pitch of teeth) to PI, also in millimeters. For bevel gears, the moduli can be divided into big-ended moduli me, average moduli mm and small-ended moduli m1. For the tool, there is the corresponding tool modulus, etc. Standard modules are widely used. In the metric gear drive, worm drive, synchronous gear belt drive and ratchet, gear coupling, spline and other parts, the standard modulus is one of the most basic parameters. It plays a basic parameter role in the design, manufacture and maintenance of the above parts (see cylindrical gear drive, worm drive, etc.).
Calculation formula:
Modulus m = dividing circle diameter d/tooth number z = tooth spacing p/PI PI
It can be seen from the above formula that the basic parameters of the gear are the diameter of the dividing circle and the number of teeth, while the module is only an artificially set parameter, which is a ratio related to the thickness of the dividing round teeth, so it can measure the size of the gear teeth. It is a historical product of the industrialization process.