SKF has launched two new super-precision cylindrical roller bearings series, which meet the machine tool industry’s demand for higher speed capability with low friction. Both deliver superior performance, accommodating higher speeds and lower friction. The bearings are optimised solutions for OEMs that require greater load carrying capacity and higher speeds. While the single row bearings have a higher speed capability, the double row bearings are more suitable for heavier loads.
The single row bearing series has an outer ring centred cage made of carbon fibre reinforced with polyetheretherketone (PEEK). The reduced number of rollers enables the bearings to accommodate higher speed and attain lower operating temperature and lower friction. The range is suited for shaft diameters from 40 to 80 mm. It offers an 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; and lathe electro-spindles.
The double row bearing series provides a unique balance between load carrying capacity, rigidity and speed. It allows higher speed capability in conventional high stiffness belt-driven CNC lathe spindles. It has 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 ideal for shaft diameters from 25 to 130 mm.
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