Bearing Numbers (Codes)
Rolling bearing part numbers indicate bearing type,
dimensions, tolerances, internal construction, and other
related specifications.
Bearing numbers are comprised of a "basic number" followed by "supplementary codes." 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 codes derive
from prefixes and suffixes which indicate a bearing's tolerances, internal clearances, and related
specifications.
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