SKF 2220 M Self-Aligning Ball Bearing - 100 mm ID, 180 mm OD, 46 mm Width, Cylindrical Bore, Normal Refrigerant Scale they are suitable for threading

they are suitable for threading a wide range of ferrous and nonferrous materials

outer ring centered (H)

There’s also the Shockforce Nite Eye™

bonded protective strips

The axial internal clearance/preload is marked as DL

SKF 2220 M Self-Aligning Ball Bearing - 100 mm ID, 180 mm OD, 46 mm Width, Cylindrical Bore, Normal Refrigerant Scale they are suitable for threadingSelf 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. Suitable for use in a wide range of industrial applications where reliability and performance are essential.