Basic introduction of gear module in gear reducer

The gear modulus in the gear reducer is a very important knowledge point. The higher the modulus, the thicker the teeth. The modulus refers to the ratio of the tooth pitch t between the tooth profiles on the same side of the adjacent two teeth to the pi (m =t/π) in millimeters.Modulus is one of the most basic parameters of modulo gear teeth.The larger the modulus.If the number of gear teeth is constant, the radial dimension of the wheel is also larger.The module series standard is formulated according to the requirements of design, manufacture and inspection. For gears with non-straight teeth, the modules are different from the normal module mn, the end face module ms and the axial module mx, which are based on their respective teeth. The ratio of pitch (normal pitch, end face pitch and axial pitch) to pi is also in millimeters.For the bevel gear module, there are big end module me, average module mm and small end module m1.For tools, there are corresponding tool modules mo and so on.The application of the gauge modulus is wide-ranging.
In metric gear drives, worm drives, synchronous toothed belt drives, ratchets, gear coupling splines, and other parts, the standard modulus is one of the most basic parameters.It plays the role of basic parameters for the design, manufacturing, and maintenance of the above parts (see cylindrical gear reducer, worm reducer, etc.)
Gear calculation formula: index circle diameter d=mz
m modulus z number of teeth
Tooth top height ha=ha* m
Tooth root height hf=(ha*+c*)m
Tooth height h=ha+hf=(z ha*+c*)m
ha*=1 c*=0.25.