Many machine repairers are upgrading to hybrid - (steel ringed bearings using silicon nitride ceramic balls) in order to improve reliability, particularly in situations where warranties are extending from 1 to 2 and sometimes up to 3 years.
Features of Hybrid Bearings – Lighter Weight
Due to mass being approximately 40% of steel, hybrid bearings can run up to 25% faster than conventional
all steel bearings. This also means that the generated temperature is also lower.
The surface finish of the ceramic ball is much smoother than the steel ball, this improves the accuracy of rotation and the part being manufactured.
Harder and Stiffer
The ceramic ball is much harder than a conventional steel ball (HV 1700@ <800°C compared to HV 700@20°C). This means that the ceramic ball is less likely to be damaged by small
amounts of hard contamination. Higher stiffness means that the hybrid bearing will distort less under high load compared to the steel ball type.
Corrosion and Electrical Resistance
These bearings can be run in more arduous environments. The electrical resistance prevents pitting of the ball surface due to electrical discharge in built-in motor spindles.
7014CSN24TRSULP3 (Standard Precision Product)
70BNR10HTSULP3 (High-speed ‘Robust’ Product)
Summary of Benefits
› Higher Speed
› Cooler Temperature
› Higher Reliability
› Longer Life
› Higher Accuracy