drilling bearing 1.high precision 2.corrosion resistance 3.free sample large stock 4.high speed Factory price Precision bearing dental drill bearing Shengyue bearing in stockDental drill bearing informationThis class bearing special bearings for Dental dentist phone, the inner and outer rings of refining stainless steel (9Cr18Mo) material the ball refined stainless steel (AISI440C) or a non- ...