What are the meshing conditions for gear and rack engagement?

1 Answers
McAmir
07/30/25 10:10am
Gear and rack meshing conditions: 1. Module of the two gears: Must be equal, and the profile angle on the pitch circle of both gears must be equal. 2. Helical cylindrical gears: The normal module of both gears must be equal, the profile angle must be equal, the helix angle must be equal, and the helix direction must be opposite. 3. Straight bevel gears: The large end module and profile angle of both gears must be equal respectively. 4. Transmission relationship: A transmission relationship between two mechanical components is called meshing transmission. Gear transmission is the most typical meshing transmission and also the most widely used form of transmission. According to different transmission principles, there are straight gear meshing transmission and helical gear meshing transmission.
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