Design
Ball screw bearings series, shorten as BS bearings, is designed to maximize smaller ball numbers with thicker I/R & O/R and 60 degree contact angle. This design allows BS bearings have greater axial rigidity than any other TPI angular contact bearing series like standard ball bearings.
HBS bearing is designed to accommodate heavy load applications, such as plastic injection molding machines. Compare to BS bearings series, HBS bearing provides relatively higher load rating and stiffness.

Inner and outer rings
Carbonitriding on both inner and outer rings is a basic hardening process for TPI BS bearings. Through this special heat treatment, hardness on the raceway surface is increased; which reduces wear accordingly.

Rolling element
High precision steel balls ensure TPI ball bearings suppliers' BS bearings and HBS bearing have the best precision and stability. This also reflects in BS bearings performance under high speed rotation.