Design
High speed ball bearings, with smaller rolling elements, HS bearings are able to withstand higher rotating speed than the standard design.

Inner and outer rings

• Standard bearing steel with a content of carbon and chromium was selected and hardened to withstand the intense pressure between the rolling elements and bearing rings.
• Carbonitriding on both inner and outer rings is a basic hardening process for TPI high speed ball bearings. Through this special heat treatment, hardness on the raceway surface is increased; which reduces wear accordingly.
• Ultra-clean steel is available in some of TPI ball bearings manufacturers' product series now, higher wear-resistance is obtained accordingly. Since contact fatigue is often caused by hard non-metallic inclusions, high speed ball bearings nowadays require exceptional levels of cleanliness.