... Co.,Ltd Dental drill bearing - We offer full range of high-speed handpiece bearing products.Bearings are rated at ABEC 7 or ... P4 (ABEC 7),usable for various brands of high-speed dental drillProduct Specifications:· Rotating speed 350.000-450.000 rpm under air-pressure ... Directive standard Usable for many brands of High-speed dental drills, such as KaVo, NSK, W&H, Bien Air, Midwest, Star, Sirona, Dabi ...