Heat Resistant Ball Bearings

Machine operators often seek NSK’s advice about specific problems – which is what happened in the case of a food tin manufacturer which found shielded deep-groove ball bearings in a continuous furnace had an average service life of just 15 days.

Specialists from NSK assessed the bearings’ operating environment and established that the furnace had a maximum temperature of around 300 ̊C. The bearings themselves reached a temperature of 120 ̊C, higher than the maximum temperature specified for conven- tional deep-groove ball bearings. The experts also discovered that the ambient air in the furnace was contaminated by particles of lacquer. NSK recommended the use of heat- stabilised bearings which are suitable for temperatures of up to 200 ̊C.