Ball Bearing Cartridges Ball bearing cartridges are housings that mount ball bearings and stabilize shafts. They are made of rubber or metal and are typically round shaped. Ball bearing cartridges run quietly and dampen vibration.The mounted housing bearing unit houses the bearings that interact with the shaft going through the center.

This ball bearing cartridge unit is suitable for use in material handling applications, such as in vibrating conveyors. Mounted bearings combine a bearing mounted inside a housing unit. The bearing housing replaces the need for a casting or weldment to position the bearing securely for reliable operation, and its design determines the type of insert bearing.

To use cartridge bearings, the hubs must have been designed to use them (absurd kludges aside). Your hubs will almost surely be classic cup-and-cone hubs, and those will need replacement bearings. However, do note that the proper number of bearings for a hub is not necessarily a number that completely 'fills' the cup bearing race.