What Bearing Numbers Represent
A complete bearing number often combines a basic designation with one or more suffixes. The basic designation commonly identifies the bearing type, dimension series and bore size; suffix information can describe seals, shields, clearance, cage, precision or another configuration detail.
The interpretation must be checked against the technical source for the exact supplied product. Different manufacturers may use different designation rules, especially for suffixes, so similar-looking codes do not by themselves establish identical construction or performance.
- Bearing type or design family
- Dimension series
- Bore size or bore code
- Suffix information for the exact configuration
How to Read Common Bearing Numbers
The designation 6205 is a useful example of a common metric deep groove ball bearing code. In this designation, 6 identifies the deep groove ball bearing family, 2 identifies the dimension series, and 05 is the bore code.
For common metric bearing bore codes from 04 upward, multiplying the two-digit bore code by 5 gives the nominal bore in millimetres. The 05 code therefore indicates a 25 mm bore diameter. Always verify the complete designation and published dimensions before ordering.
Common Bearing Suffixes
For many deep groove ball bearing designations, 2RS commonly indicates rubber seals on both sides and ZZ commonly indicates metal shields on both sides. These enclosure choices affect contamination protection, friction, lubricant retention and speed considerations.
Suffix conventions are not universal. Confirm the meaning in the technical data for the exact product rather than treating every supplier suffix as identical.
Examples From LTO Bearing Database
The published records below support engineering queries and dimension reference. Each page preserves the designation, boundary dimensions, cited reference status and quotation path without assuming that adjacent numbers have the same operating capability.
Need Help Identifying a Bearing?
Send the complete bearing number, visible markings, measured dimensions, a drawing or clear photographs, and the available operating requirements. Include load, speed, environment and quantity when known so the engineering review can separate confirmed data from open questions.
Reference sources
These sources support terminology and engineering context. The exact supplied bearing remains governed by the offered manufacturer data and approved documents.
