Steel ball shaft coupling has the following advantages:

1. Large bearing capacity: the contact between the two concave semi-cylindrical grooves and the steel ball always is arc line contact when the two axes angle changes.

The contact stress is smaller and the wear is smaller.

2. Allows a large misalignment angle between the shafts: the contact position between the two concave semi-cylindrical grooves and the steel ball is not restricted, and very

flexible, so the allowable misalignment angle between the shafts can reach up to 12 degrees.

3. Vibration isolation, low noise: the gap between the two concave semi-cylindrical grooves and the steel ball is quite small, theoretically it can be zero, So it’s work precise, stable, low noise, suitable for the connection of high-speed shafts.

4. High transmission efficiency: It’s rolling friction movement of the two concave semi-cylindrical grooves and the steel ball when the angle of the two shafts changes and the axial movement is rolling. The friction loss is smaller, the transmission efficiency is high, the temperature is low, and the energy is saved.

5. Long service life: the inner and outer teeth are formed by two concave semi-cylindrical grooves, so the root strength is extremely high, and the teeth will not break;

The surface is heat-treated into a hard tooth surface, which improves the strength and wear resistance.

6. The installation accuracy requirement is low, and the use and maintenance are simple: the coupling allowed bigger misalignment angle between the shafts and low requirements for shaft alignment, so the installation accuracy is low, and it is not easy to be damaged; there is no requirement for maintenance with lubrication.