They are the most typical rolling bearings with extensive applications. The raceways in both of the rings are in arc groove form, which can carry radial and axial load in double directions
6230M Deep groove ball bearings generally use pressed cages of steel sheet or brass cages. When the outer diameter is less than (inclusive)400mm, they use pressed cage with steel sheet. When the outer diameter is bigger than 400mm,they use brass cages.
6030 Deep groove ball bearings generally use pressed cages of steel sheet or brass cages. When the outer diameter is less than (inclusive)400mm, they use pressed cage with steel sheet. When the outer diameter is bigger than 400mm,they use brass cages.
16030M Deep groove ball bearings generally use pressed cages of steel sheet or brass cages. When the outer diameter is less than (inclusive)400mm, they use pressed cage with steel sheet. When the outer diameter is bigger than 400mm,they use brass cages.