The ABMA (The American Bearing Manufacturer association standard specifies how to formulate the bearing number for tapered roller bearings in the inch system, the ABMA method of specifying bearing numbers is applicable to bearings with new designs.
Bearing numbers for tapered roller bearings in the inch system, which have been widely used will continue to be used and known by the same bearing numbers .Although bearing manufactured uses ABMA bearing numbers to designate new bearing designs, many of its bearing numbers do not conform to ABMA rules.
A bearing number is composed as follows.
Load limit symbol: indicates an alphabetical character£»
Contact angle number: numerical digit£»
Series number£ºnumerical digit£»
Auxiliary number: numerical digit;
Auxiliary symbol: indicates an alphabetical character