In the design, the gear shaft is generally used in the following situations:
1. The gear shaft is usually a pinion (a gear with few teeth).
2. The gear shaft is generally in the high-speed stage (that is, the low torque stage).
3. The gear shaft is rarely used as a sliding gear for speed change, and is generally a fixed running gear. First, because it is at the high-speed level, its high speed is not suitable for sliding speed change.
4. The gear shaft is an integral part of the shaft and the gear. However, in the design, the length of the shaft should be shortened as much as possible. If it is too long, it is not conducive to the upper gear hobbing machining. Secondly, the support of the shaft is too long, resulting in the shaft to be thickened and increase the mechanical strength (such as rigidity, deflection, bending resistance, etc.).
