This kind of bearing is specially used indentai handpiece,innier and outer iings are made of refining stainless steei(9cr18mo),the ball is made of rcfined stainless stecl (AISI440C/9Cr18Mo)or non-metallic hard ceramics(Si3N4)with good wear resistance;cage uses material with a high strength, low friction resistance and self-lubricatng properties of Tiolon or 80~120phenolic cloth bakelite material,the bearing  200~250kPa air pressure,the speed of up to  350000~450000mp.Under normal use conditions,the bearing operating life can be more than 6 months.

Production precision of High Speed Dental phone bearings can each to natiomal standards GB/T807,1-2005 P4 level requirements,which can be applied to different types of dentists phones abroad .Our Company's high-speed dental bearings  can also be high-speed mobile grinding machine.