SKF 2311 Self-Aligning Ball Bearing - 55 mm ID, 120 mm OD, 43 mm Width, Cylindrical Bore, Normal Ergonomics the suitcases can be connected

the suitcases can be connected to each other and thus transported more easily

Below the crossbar

The holster has a robust construction

and aligned

SKF 2311 Self-Aligning Ball Bearing - 55 mm ID, 120 mm OD, 43 mm Width, Cylindrical Bore, Normal Ergonomics the suitcases can be connectedSelf Aligning Ball Bearing Self Aligning Ball Bearings have two rows of balls and a common concave sphered raceway in the outer ring. They are insensitive to angular misalignment of the shaft relative to the housing. Manufactured to precision tolerance class for demanding applications. Robust steel cage construction ensures durability. Suitable for use in a wide range of industrial applications where reliability and performance are essential.