High-speed hybrid Bearings for dental drill

Generally, the material of the dental drill bearing ball is 440C stainless steel, which is used in the occasion of lower speed dental drill bearing. Si3N4 ceramic ball has the characteristics of high hardness (1500~2000HV), low centrifugal force, corrosion resistance and friction and wear, small thermal expansion coefficient (only 25% of steel balls), etc. In addition, it absorbs low heat and has low cooling requirements. Therefore, it is very suitable as a material for rolling elements of high-speed dental drill bearings. The high speed performance of dental drill bearings determines the importance of the dimensional accuracy and geometric tolerances of their cages to the bearings. The processing equipment of dental drill bearing cage is CNC lathe. The lathe has high machining accuracy and good aliquoting performance, and can turn the cage to form at one time, and does not need to perform notch processing according to the traditional process.