Stainless Steel Flanged bearings have a solid steel flange on the outer ring. This allows the bearing to be more easily located in a housing. The flange can also help to prevent axial movement of the bearing in the event of a thrust load on the bearing. It is easier to maintain the position of a flanged bearing in the housing where a lot of vibration is present.
Stainless Miniature Flanged Ball Bearings
Stainless Miniature Flanged Ball Bearings With Extended Inner Ring