The basic number indicates general information about a bearing such as its fundamental type, boundary dimensions, series number, bore diameter code and contact angle. The supplementary code derive from profixes and suffixes which indicate a bearing’s related specifications.

● Nomenclature-Metric Tapered Roller Bearings

Note: Metric tapered roller bearings follow ISO0355-1977 and ANSI/ABMA standard 19.1-1987, which is similar to the system used for inch tapered roller bearings ANSI/ABMA standard 19.2-1994.

● Nomenclature - Inch Tapered Roller Bearings