Tooth drill high speed bearing

Drill bearings are special bearings for dental dentists' mobile phones. The inner and outer rings of the tooth drill bearing produced by Shanghai Liangyan are made of refined stainless steel (9Gr18). The ball is made of refined stainless steel (9Gr18) or non-metallic super hard ceramics (Si3N4), with good wear resistance. The retainer is made of polyimide with high strength, low wear resistance and self-lubricating properties, or 80 ~ 120 phenolic coated bakelite materials. The drill bearing can rotate at 350000 ~ 400000rPm under 200 ~ 250Kpa air pressure. Under normal service conditions, the working life of the drill bearing is more than 6 months.