BNR: High-Speed Angular Contact Ball Bearings (NSKROBUST Series)

High performance ACBBs with high rigidity and low heat generation. The results of temperature rise simulations undertaken to evaluate rolling element slip were used to optimize the design of this series.

NSKROBUST bearings are available as S, E, H or X type with different combinations of materials such as high accuracy ceramic balls and heat-resistant high-speed SHX Steel, enabling our customers to choose the most suitable bearing for each application.

Sealed bearings are available mainly up to 120mm bore diameter. Optimization of the space between seal and cage and minimization of the seal labyrinth prevent grease leakage. The wide-width series (29, 20 series) has been designed to allow more grease to be held inside the bearing. This helps keep temperature rise down and prolongs grease life.

The Spinshot type has been designed for noise reduction and greater reliability of oil-air lubrication during ultra high-speed operation. The BSR series bearings retain high radial rigidity even in high-speed operation with constant pressure preload. This makes them ideal for grinders and similar applications.

BNR: 18° contact angle