With import  Dental Bearing speed increase, dense metal materials keep frame already cannot fulfill the requirements of all kinds of import  Drill Bearing , and density on the metal is just 1/4 to 1/8, wear-resisting, seismic resistance, capability radiation, magnetic, corrosion resistant, low friction, or other unique great things about plastic, throughout the rolling bearing keep frame materials imported the ranks. Phenolic laminated fabric material density is small, mechanical high strength, mechanical processing performance in perfect shape, have certain heat temperature and oil absorption, oil leakage, for example performance, are generally widely put on 2 ~ 200 mm diameter of Angle contact ball bearing keep frame. Including fast grinding head bearing, machine tool bearing, instrument bearing, the gyro bearing, turbines bearing, supercharger bearing are adopted the phenolic laminated fabric material, which keep frame dn value is really as high as 12 x 106 mm r/min.

The metal cage to cannot fulfill the requirements of the host occasions, plastic cage show special advantages. Including are generally not able to use oil's liquid oxygen (183 ) be employed in the import bearings, furnished with the stamping steel cage deep groove ball bearing 6204 in 100 kg axial load, 10000 r/min running under 16 min that burn, there is certainly glass fiber reinforced plastic creation of ptfe keep frame Angle contact ball bearing, in the 100 kg of your axial load, 20000 r/min running under 20 h, still no friction torque increase. Use mos2, ptfe, glass fiber modification of polyimide keep for bearing holder, radiation in vacuum without oil lubrication work, has been used during the Apollo spacecraft. Porous oil polyimide keep rack actually life bearing, gyroscope porous oil phenolic laminated fabric material rack in communications satellite to have the business, polyimide keep bearing rack in high-speed drill bearing, glass fiber reinforced polyamide 66 to maintain the actual vehicle around gear box, differential gear box, the clutch together with the wheel hub, water pump and mines around the delivery mechanism, making use effect is excellent.