What is the transverse module?
There are two types of tooth profile for helical gears, normal and transverse types, depending on the reference cross section of the tooth profile.
As shown in the figure below, the module for the transverse type, where the reference cross section of the tooth profile is perpendicular to the central axis of the gear, is called the transverse module (axial module).
The advantage of the transverse module for helical gears is that they can be used with the same center distance as spur gears with the same module and number of teeth. On the other hand, the disadvantage is that during manufacturing, special cutters for cutting the gears and grinding wheels for grinding the tooth surface are required for each helix angle.
In addition to helical gears, worm gears also have normal and transverse types, and tooth profiles with different reference cross sections cannot be used together.
相关链接 - 端面模数