Precision bearings get ceramic rollers

Feb. 5, 2004
MRC Bearings now offers precision-finished, silicon-nitride rollers separately, or installed in its line of aerospace hybrid roller bearings.

MRC Bearings, a div. of SKF, Jamestown, N.Y. (www.mrcbearings.com), now offers precision-finished, silicon-nitride rollers separately, or installed in its line of aerospace hybrid roller bearings. MRC uses Cerama SN-101C silicon nitride ceramic roller blanks from Saint-Gobain Ceramics, East Granbury, Conn. (www.cerbec.com).

Hybrid roller bearings (silicon-nitride roller in metal races) are said to last longer and run faster than their all-steel counterparts. Silicon nitride has just 40% the density of steel, which lowers rotational inertia and centrifugal force. Lower friction and less wear from smooth, hard ceramic surfaces let hybrid bearings run cooler with less lubricant. Applications for ceramic rollers include precision bearings for aerospace, machine tools, and racing.

--Lawrence Kren

Sponsored Recommendations

April 16, 2025
Clean. Compact. Less heat.
April 16, 2025
SEW-EURODRIVE Introduces DR2C motor, IE5 Ultra-Premium Efficiency Motor
March 31, 2025
Unlike passive products - made of simple carbon springs - the bionic prostheses developed by Revival Bionics are propulsive, equipped with a motor and an artificial Achilles tendon...
March 31, 2025
Electric drives are a key technology for the performance of machines, robots, and power tools. Download this guide for an introduction to high-quality mechatronic drive systems...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!