Ball bearings used in dental highspeed handpieces reduce rotational friction to allow the spindle/chuck assembly in the turbine cartridge (and the bur, when inserted) to spin at speeds from 250,000 to 500,000 rpms. This makes the highspeed dental turbine one of the fastest rotating devices in the world.
The highspeed ball bearing is comprised of:
A. Outer ring or outer race
B. Inner ring or inner race
C. Cage or retainer or separator
D. Balls
E. Shield
Common dental ball bearing designs
Outer ring has full shoulders and inner ring has a relieved and unrelieved shoulder. Features symmetrical cages that enhance performance and extend bearing life as each ball is fully supported and completely surrounded by the cage. Must be axially preloaded with springs or o-rings to ensure contact with the full unrelieved shoulder.
Extend high speed dental bearings provide the highest quality performance made to match or exceed the OEM specifications. With premium features like angular contact cages, ceramic balls and upgraded lubricants the Extend bearings is your go to for high end dental handpiece bearings replacement.
Our Perfection high speed bearings were designed to offer the perfect balance between high quality build and reliability with a cost effective price point. They feature a PAEK (black) cage that are stronger and resist the sterilization process better than our older bearing design. With steel or ceramic options as well as a discount when buying in 10-packs these bearings are perfect for most high speed dental handpiece repairs.