the gear shaft refers to the complete mechanical machine that supports the migration and transformation of the complete machine and rotates along with it to transmit motion, torque or bending moment. It is usually in the shape of a metal round rod, and each section can have different diameters. the complete machine for rotating parts in the machine is mounted on the shaft.

in the plan, the application of gear shafts is usually nothing more than the following environments:

1. the gear shaft is usually a pinion (a gear with a small number of teeth).

2. the gear shaft is usually in the high-speed stage (that is, the low-torque stage).

3. Gear shafts are generally rarely used as sliding gears for shifting. They are usually gears that run firmly. First, because they are in the high-speed stage, their high speed is not suitable for stopping slipping and shifting.