SKF has developed a new kind of high precision cylindrical roller bearing, said to enable high-speed spindles to achieve high rigidity without design compromise.
New features of this bearing include a large number of small ceramic rolling elements and a high-tech engineered polymered cage.
Made of lightweight, glass fibre reinforced poly-ether-ether-ketone, the cage is said to have good wear resistance, low friction and good stability at high speeds. The use of silicon nitride rollers reduces the centrifugal load and, according to SKF, improves the bearing kinematics.
This bearing is said to reach speeds of 2 million ndm with oil-air lubrication, which represents a 40 to 50% increase over conventional high precision cylindrical roller bearings.
The range is available with a taper bore inner ring, which allows favourable preload – or clearance – adjustment.
There is an option to improve the lubricant flow, and the standard range covers sizes from 40 mm to 120 mm bor3 diameter.
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