The SA 208 AV12 is an insert bearing secured on the shaft by means of an eccentric locking collar, with the inner ring extended to one side. Bore diameter (d) is 40 mm, outer diameter D is 80 mm, and weight is 0.63 kg. Further dimensions read from the catalogue drawing: B = 43.7 mm, C = 21 mm, c = 32.5 mm, m = M 10 x 1.25, s = 11.0 mm, c0 = 19.8 mm, d1 = 49.4 mm, d2 = 58.0 mm. The bearing corresponds dimensionally and constructionally to SKF YET 208. Sealing is provided by a pressed steel washer fitted with a rubberized lip, which keeps contaminants out of the raceway area and retains grease inside the housing. The extended inner ring combined with the eccentric locking collar allows quick clamping onto the shaft and prevents unintended loosening under rotation, while the M 10 x 1.25 thread (m) is used for the locking element itself. This construction is intended for shaft mounting where the bearing has to be positioned and secured from one side, with the insert-type design allowing it to be used together with a separate housing.