TS ISO 1132-1

TS ISO 1132-1 defines the terms and definitions used in international standards dealing with tolerances for rolling bearings. It provides a common vocabulary for concepts directly tied to boundary dimensions, running accuracy, geometrical accuracy, and internal clearance, helping technical communication, measurement, and comparison stay consistent across documents and organisations.

Why tolerance terminology matters for rolling bearings

In bearing technology, tolerance describes how far an actual part may deviate from its ideal geometry. Boundary dimensions refer to the permitted size limits of the bearing components, while running accuracy and geometrical accuracy relate to how precisely the bearing rotates and how closely its form follows the intended geometry. Internal clearance is the free movement between rings before or after mounting, and it has a direct influence on bearing behaviour. Clear definitions are essential because these concepts are related, but not interchangeable.

The terminology framework covered by this part

This TS ISO 1132-1 document covers the terms used in international standards that specify tolerances for rolling bearings. In general technical terms, a vocabulary standard does not set numerical tolerance values on its own; it establishes the meaning of the concepts used elsewhere. That makes it easier to interpret related standards consistently, including those dealing with size limits, measuring practice, and installation-related fit considerations.

Its practical value is clarity: by distinguishing boundary dimensions from running accuracy and internal clearance, the standard supports more precise specification, inspection, and quality communication in bearing engineering. The result is a shared technical language for design, manufacturing, and metrology contexts.