1. The arc gear transmission trial meshing transmission, the value is suitable for helical gears, but not for spur gears.
2. The relative radius of curvature is larger than the involute, and the contact strength is higher than the involute.
3. The sensitivity to center distance changes is greater than the involute curve. During processing, the cutting depth is required to be high, radial displacement cutting is not allowed, and assembly errors are strictly controlled.