Dental bearing

Dental bearing: Product Specifications *Rings AISI 440C stainless steel: 9Cr18 for inner ring and outer ring Balls: Si3N4 Ceramic balls or stainless steel balls*Rotating speed 350,000-450,000 rpm under air-pressure of 200-250Kpa *Working life about six months under the normal operation *Weak acid resistant, Weak base resistant *Corrosion resistant, High-temperature resistant *Perfectly usable for many brands of High-speed dental turbing handpiece, such as KAVO,NSK,W&H,BIEN AIR, MIDWEST,STAR,FARO,ADEC,SIEMENS,LARES,etc. Dental bearing size: 6.35(1/4") * 3.175(1/8") * 2.38(3/32") 6.35 * 3.175 * 2.78(7/64") 6.35 * 3.175 * 1.910 7.938(5/16") * 3.175 * 3.571(9/64") 7.938 * 3.175 * 2.78 7.938 * 3.175 * 2.38