There are two basic types of dental ball bearings depending on the type of work that the tool is designed for. The first type is the Radial Bearing and the second type is the Thrust Bearing. Radial Bearings are designed for working in deep grooves and for angled dental surfaces. Radial Bearings have an inner ring, an outer ring, a series of balls and typically a cage to contain the balls. 
Since 1987, one of Boca's primary goals has been to maintain the world's largest inventory of miniature bearings in all of the most popular metric and inch sizes.

Contact person: Allen baum
Address: 1420 Neptune Drive,Suite A,Boynton Beach FL 33426
Zip: 33426
Telephone: 1-561-998-0004
Fax: 1-561-998-0119
Website: 
http://www.bocabearings.com