Overview
ISO 3030:2022 - "Rolling bearings - Radial needle roller and cage assemblies - Boundary dimensions, geometrical product specifications (GPS) and tolerance values" - defines the nominal boundary dimensions, GPS-based specification rules and selected tolerance values for radial needle roller and cage assemblies. The fourth edition (2022) implements ISO GPS principles and adds informative guidance on functional gauging.
Key points:
- Specifies nominal boundary dimensions for multiple diameter series and dimension series.
- Provides tolerance for cage width (Bc) and references needle roller tolerances to ISO 3096.
- Includes informative Annex A (shaft/housing raceway tolerances and hardness) and Annex B (functional gauging method).
Key topics and technical requirements
- Boundary dimensions: Tabulated nominal sizes for diameter series (1C–5C) and corresponding cage widths and complement diameters.
- Geometrical Product Specifications (GPS): ISO/GPS system applied per ISO 8015 and dimensional tolerancing per ISO 14405-1; default decision rules per ISO 14253‑1.
- Tolerances:
- Cage width (Bc) tolerance: upper deviation −0.2 mm, lower deviation −0.8 mm (see Table 4).
- Needle rollers: tolerances and gauges in accordance with ISO 3096; needle roller grade to be agreed between supplier and customer.
- Raceway requirements (Annex A, informative):
- Suggested tolerances for shaft raceway and housing raceway (diameter deviation, roundness, Ra).
- Minimum shaft raceway hardness: approx. 670 HV (~58 HRC) (finish ground).
- Functional gauging (Annex B, informative):
- Method using a ring gauge (housing) and plug gauge (inscribed diameter) to verify the functional bore/outside diameters of the needle roller complement when direct measurement is impractical.
- Ring gauge diameters correlate to the lower deviation limit of housing raceway; plug and ring gauge allowance varies by diameter range (see Table B.1).
Applications and who uses this standard
ISO 3030:2022 is intended for:
- Bearing manufacturers and suppliers for design, production and specification of radial needle roller and cage assemblies.
- Design engineers and OEMs specifying bearings for mechanical systems that use needle roller complements.
- Quality, inspection and metrology teams performing dimensional control and functional gauging.
- Technical buyers and procurement specialists ensuring component interchangeability and compliance.
Practical benefits:
- Ensures interchangeability and compatibility between supplier parts and customer housings/shafts.
- Provides GPS-based specification consistency for drawings and inspection procedures.
- Offers guidance for functional gauging where direct measurement is not feasible.
Related standards
Keywords: ISO 3030:2022, rolling bearings, radial needle roller and cage assemblies, boundary dimensions, geometrical product specifications, GPS, tolerance values, functional gauging, cage width, raceway tolerances.
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