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Spherical Roller Bearings

Internal operating clearance of a spherical roller bearing — the space between the rollers and the outer ring, — can also be critical to the application. Internal operating clearance is also encoded in the nomenclature. For example, a suffix could be shown as C2, C0, or C3, with C0 representing normal tolerance; C2, less clearance than normal; and C3, more. Be sure to check nomenclature designations on a given bearing with a catalog from the maker of that bearing to assure meanings of all suffixes in the nomenclature. There are some variations among manufacturers.
As an example of the usefulness of operating clearance suffixes in bearing nomenclature, high-temperature or highspeed applications provide better service if additional clearance (C3) is provided. Lower clearance (C2) may increase service life in a heavily loaded, low-speed application, because more roller surface is in contact with raceways.

AST 22326CW33 spherical roller bearings
55
120 mm
130 mm x 200 mm x 52 mm FAG 23026-E1-K-TVPB spherical roller bearings
N/A
0.911
190 mm x 340 mm x 92 mm FAG 22238-K-MB spherical roller bearings
sealed
130,175
AST 22234MB spherical roller bearings
NSK
174 mm
280 mm x 500 mm x 176 mm ISO 23256 KCW33+AH2356 spherical roller bearings
54 kN
57,4 Tolerance h14
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