MR148zz UP200 Drill Bearing,8x14x4mm Bearing with No Oil for High Speed,Dental Grinding Handle Ball Bearings(Pack of 10Pcs)

Improper bearings will cause severe fever.FUSHI has made 5000+ of attempts.the bearings of these special structure are developed.These bearings are not grease, and with improved cage. This is dedicated to the nail machine and grinding machine in the bearings,These devices have to be at a speed of tens of thousands of RPM,So ordinary bearings are not applicable,Special structure is required. Grease can play a role of lubrication and protection at slow speed.But in a moment of high speed, it will hinder,Including high temperature grease, also has no effect. We already have customers using UP200 and Strong102,Speed in 20000-35000rpm, no problem. Size:8x14x4mm With no grease.Also fits the UP200 UG12, UG14, SUG12 handpieces.