Sun Gear

41.8 long, 9 teeth.
The sun gears are concentric, ie rotate around a common axis. This eliminates countershafts and intermediate gears such as those used in manual transmissions.
The basic component of the epicyclic gear train to which the sun gear belongs. In the planetary gear train, the external gear as the central gear is called the sun gear.
The sun gear device has simple structure, good process performance and excellent shock absorption.
The inner and outer lock nuts can be used repeatedly without reducing the connection strength and reliability, and the later maintenance cost is low.