Overview
ISO 7063:2018 specifies boundary dimensions, geometrical product specifications (GPS) and tolerance values for needle roller bearing track rollers - covering both yoke and stud types. This machine-element geometry standard (third edition, corrected 2020) defines nominal sizes, symbols, and dimensional characteristics used in technical product documentation and drawings. It is aligned with the ISO GPS system (ISO 8015) and uses the two‑point size default of ISO 14405‑1.
Key topics and technical requirements
- Scope: Dimensional characteristics, nominal boundary dimensions and tolerance values for needle roller bearing track rollers (yoke and stud types).
- GPS and measurement rules: Applies ISO GPS principles (ISO 8015) and default decision rules (ISO 14253‑1); measurement uncertainty guidance referenced to ISO 14253‑2.
- Symbols and tolerancing: Defines symbols, specification modifiers and notation (e.g., ∆Dmp, ∆d1s), and uses the GPS system for form, orientation and location (ISO 1101).
- Dimension tables: Boundary dimensions are tabulated for light and heavy series (yoke: Tables 2–3; stud: Tables 4–5). The standard specifies which surfaces may be crowned or cylindrical and gives chamfer/fillet indications (r, r_s).
- Tolerances: Tolerance values for yoke and stud types are provided (Tables 6–9) with symbols for upper and lower deviations.
- Optional features: Yoke and stud types may be manufactured with or without cages and seals. For stud types, axial and radial lubrication holes are optional (where present, dimension B applies); lubrication hole diameters are not specified.
Applications and practical value
- Ensures interchangeability and consistent fit for needle roller track rollers used in linear guidance, conveyor systems, cam followers and a variety of rolling-contact applications.
- Supports accurate CAD modeling and detailed manufacturing drawings by providing standard boundary dimensions and GPS-compatible tolerancing.
- Helps reduce design ambiguity and production rework by standardizing symbol usage and measurement rules across suppliers and OEMs.
Who should use this standard
- Bearing manufacturers and component suppliers - for consistent product specification and production tolerancing.
- Design and mechanical engineers - when selecting or specifying needle roller track rollers in assemblies.
- Quality, metrology and inspection teams - for conformity checks, measurement planning and reporting.
- Procurement and OEMs - to define clear purchasing and acceptance criteria.
Related standards
Keywords: ISO 7063:2018, needle roller bearing track rollers, boundary dimensions, GPS, tolerances, yoke type, stud type, bearing standard.
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