SKF recently launched two new "super-precision" cylindrical roller bearings series, targeted at the machine tool industry. The company says both of the new series deliver much improved bearing performance compared with existing SKF offerings.
“The new cylindrical roller bearings are optimized solutions for OEMs that require greater load carrying capacity and higher speeds. While the SKF super-precision single row cylindrical roller bearings have a higher speed capability, the SKF super-precision double row cylindrical bearing are more suitable for heavier loads,” said Mauro Merlo, Super Precision Bearings Product Manager, SKF.
The single-row cylindrical roller bearings series is equipped with an outer ring centered cage, window-type, made of carbon-fiber-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 suited for use where shaft diameters range from 40 to 80 mm (1.6 to 3.2 in).
The new single-row series is suitable for applications like the non-tool end of a motorized spindle, where the requirement for higher speed outweighs that for higher rigidity, high-speed milling machines, high-speed machining centers, and lathe electro-spindles.
The new double-row super-precision cylindrical roller bearings series provides a balance between load carrying capacity, rigidity, and speed. This 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 optimized internal geometry and a new glass-fiber-reinforced, prong-type, roller centered PEEK cage, which enables the bearings to accommodate higher speeds and minimize the amount of frictional heat generated. The range is suitable for shaft diameters from 25 to 130 mm (1.0 to 5.1 in).
SKF says it will work to support OEMs via the evaluation of the total cost of ownership and benefits of the new super-precision series, ensuring the correct bearings are specified for a particular application.