Overview
ISO 3228:2013 - "Rolling bearings - Cast and pressed housings for insert bearings - Boundary dimensions and tolerances" defines the boundary dimensions and tolerances for cast and pressed housings used with insert bearings whose boundary dimensions are listed in ISO 9628. Published as the fourth edition in 2013, the standard covers common bearing housings - plummer block, flanged housings (square, oval, round/triangular) and take-up housings - and provides the dimensioning rules, tables and schematic figures needed for consistent manufacturing and interchangeability.
Key topics and requirements
- Scope: Applies to cast and pressed housings for insert bearings; relubrication features are optional but, if provided, must intersect the lubricant zone specified in ISO 9628 (the standard does not specify relubrication feature design).
- Boundary dimensions & tolerances: Detailed nominal values, maximum/minimum conventions and tolerance limits are provided in Tables 1–10 for a range of diameter series (including extended entries for diameter series 3 and larger sizes).
- Housing types and symbols: Schematic figures (Figures 1–6) illustrate the naming of dimensions and tolerances for plummer block, flanged (square/oval), take-up and pressed housings; symbols follow ISO 15241.
- Dimensional conventions: Where “max.” or “min.” is shown, the table value represents both nominal and limiting size; single-distance deviations and position tolerances are specified for bolt holes, slots and seating diameters.
- Normative references and definitions: Terms use ISO 5593 (rolling bearings vocabulary) and symbols per ISO 15241.
Applications and users
ISO 3228:2013 is practical for:
- Bearing and housing design engineers specifying mating housings for insert bearings.
- Manufacturers of cast or pressed housings needing standard boundary dimensions and production tolerances.
- Quality and inspection teams verifying compliance with dimensional tolerances and hole/slot positions.
- OEMs, maintenance and procurement professionals requiring interchangeability and reliable relubrication paths.
- Suppliers and component libraries ensuring parts are compatible with ISO 9628 insert bearings.
Benefits include improved interchangeability, reduced design ambiguity, consistent mounting interfaces and clearer manufacturability requirements for cast and pressed bearing housings.
Related standards
- ISO 9628 - Boundary dimensions for insert bearings (primary mating reference)
- ISO 5593 - Rolling bearings - Vocabulary (terms and definitions)
- ISO 15241 - Rolling bearings - Symbols for quantities
Keywords: ISO 3228:2013, rolling bearings, cast housings, pressed housings, insert bearings, boundary dimensions, tolerances, plummer block, flanged housing, take-up housing, ISO 9628.