604-ZZ Shield Ball Bearings

604-ZZ is a small deep groove ball bearing with metal seals and grease on both sides, ball bearing inner dimension 4mm X outer dimension 12mm X width 4mm. Can be used for angle grinders, roller skating, pistol drills, vacuum cleaners and other household equipment.

604-ZZ bearing steel is heat-treated with high and uniform hardness and good wear resistance. Applicable to various industrial equipment, micro motors, small rotating electrical machines, office equipment, etc. This type of bearing has a metal shield inserted into the outer ring during manufacture, which can prevent minor mechanical damage, and effectively prevent dust and other foreign objects from entering the bearing chamber, extending the service life.