Overview
ISO 22872:2024 - Rolling bearings - Geometrical product specifications (GPS) - Vocabulary and representation of symbols defines the standardized vocabulary and symbol representation used for geometrical product specifications (GPS) in the rolling bearings field. The standard specifies how GPS indications are transformed into figures, tables and textual/drawing indications, and it sets rules for representing symbols, tolerance values, limits of size, limit deviations and limit values for bearings.
This first edition updates and consolidates terms and symbols (replacing the role of ISO 1132-1) while keeping widely used, market-established symbols to ease industry transition to GPS-based wording.
Key topics and technical requirements
- Terms and definitions: Comprehensive vocabulary for dimensional and geometrical characteristics specific to rolling bearings - e.g., nominal bore diameter (d), outside diameter (D), ring widths (B, C), assembled bearing height/width (T, T1), tapered slope (SL), and derived ranges and deviations.
- Symbols and notation: Rules for symbols for physical quantities and additional symbols (see Clause 4). Existing traditional bearing symbols are retained where practical.
- Representation rules: Requirements and recommendations for transforming GPS indications (ISO 1101, ISO 14405-1 principles) into figures, tables and textual indications on technical drawings and documents (Clause 5, Annex A).
- Tolerance and deviation conventions: Definitions and notation for ranges of sizes, mid-range sizes, two-point sizes, deviations (Δ), and limit values for bore/outside diameters, ring widths and other bearing features.
- Graphic description examples: Annex A (informative) illustrates recommended representations, with sample figures and tables for consistent documentation.
Practical applications and users
ISO 22872:2024 is intended for professionals who specify, design, manufacture, measure or document rolling bearings:
- Bearing designers and engineers - to create consistent part specifications and drawings.
- Quality and metrology engineers - to interpret GPS-based tolerances and deviations for inspection and acceptance.
- CAD/drafting specialists - for standardized symbolic representation on technical drawings and BOMs.
- Manufacturers and suppliers - to ensure contract and production consistency across international markets.
- Procurement and standards bodies - to write precise purchase specifications and ensure interoperability.
Using ISO 22872 helps reduce ambiguity in tolerancing, improves communication between OEMs and suppliers, and aligns bearing documentation with modern GPS practices for quality assurance and international trade.
Related standards
- ISO 1101 (geometrical tolerancing principles)
- ISO 14405-1 (dimensional measurement and size definitions)
- ISO 199 and ISO 492 (bearing-specific standards referenced for GPS integration)
- (Replaces role of) ISO 1132-1 for rolling bearing terms
Keywords: ISO 22872:2024, rolling bearings, geometrical product specifications, GPS vocabulary, bearing symbols, tolerances, technical drawings.
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