Insert ball bearings are designed in almost the same way as deep groove ball bearings, except the outer ring is spherical and with wide inner rings.

It can ensure tidiness of groove shape for skewed rotor, accordance of the sheets tilted and easy to insert these conducting bars with the manufacturing process of inserting stamping sheet.

All these studies provide gist for doing the insert groove optimization design and the development of three-dimensional complex groove turning insert which has independent knowledge property right.