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Super-precision cylindrical roller bearings for machine tools

31 October 2015

SKF has introduced two new super-precision cylindrical roller bearings series offering machine builders higher speeds and lower friction.

The single row cylindrical roller bearings series is equipped with an outer ring centred cage, window-type, made of carbon fibre reinforced polyetheretherketone (PEEK). The reduced number of rollers, together with the optimized cage, enable the bearings to accommodate higher speed, attain lower operating temperature and lower friction. The range is suitable for shaft diameters from 40 to 80mm.

The new single row series represents the optimal solution for applications like the non-tool end of a motorised spindle, where the requirement for higher speed outweighs that for higher rigidity, high-speed milling machines, high-speed machining centres, lathe electro-spindles.

The new double row super-precision cylindrical roller bearings series allows higher speed capability in conventional high stiffness belt-driven CNC lathe spindles. It features three integral flanges on the inner ring and no flanges on the outer ring

In addition, the series has an optimised internal geometry and a new glass fibre reinforced, prong-type, roller centred PEEK cage, which enables the bearings to accommodate higher speeds and minimise the amount of frictional heat generated. The range is suitable for shaft diameters from 25 to 130mm.

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