ISO 199:2023

Overview - ISO 199:2023 (Rolling bearings - Thrust bearings - GPS and tolerance values)

ISO 199:2023 specifies the geometrical product specifications (GPS) and tolerance values that define the interface of thrust rolling bearings (except chamfers). It establishes dimensional characteristics, deviation limits from nominal values and tolerance classes used to document shaft and housing interfaces, washer bores, outside diameters and assembled bearing heights. Nominal boundary dimensions are referenced to ISO 104. This fifth edition updates symbols and GPS representations and applies to common thrust ball and cylindrical roller bearings (not to some types such as thrust needle roller bearings or special precision thrust bearings).

Key topics and technical requirements

• Scope of dimensions: Defines interface dimensions for shaft washer, central shaft washer, housing washer, bore (d), outside diameter (D) and assembled bearing height (T), excluding chamfers (see ISO 582).
• Tolerance classes: Provides tolerance tables for Normal and specific classes (6, 5, 4) with deviation limits and tolerance values (given in micrometres) across diameter ranges. Tables 3–10 in the standard list these values.
• Symbols and notation: GPS symbols are standardized (many prefixed by “t” for tolerance values, e.g., tVdsp) and aligned with ISO GPS rules; assembled bearing height symbol revised in this edition.
• Graphical description: Figures correlate interface dimensions with GPS indications for single- and double-direction thrust bearings; specification operators (e.g., filtration) are to be agreed case by case per ISO 8015.
• Measurement and conformity: Follows ISO GPS fundamentals (ISO 8015), dimensional tolerancing (ISO 14405‑1) and decision rules (ISO 14253‑1); measurement uncertainty guidance referenced.

Practical applications - how ISO 199:2023 is used

• Ensures interchangeability of thrust bearings and compatibility between shaft/housing interfaces.
• Guides design engineers when specifying bearing boundary dimensions and tolerances on drawings.
• Informs manufacturing and quality control for setting inspection limits, measurement procedures and acceptance criteria.
• Supports metrology labs and test engineers when reporting deviation limits and uncertainty in measurements.
• Used by procurement and OEMs to write clear specifications and by bearing manufacturers to produce to agreed tolerances.

Who should use this standard

• Bearing manufacturers and suppliers
• Mechanical design and application engineers (rotating machinery, gearboxes, automotive, aerospace)
• Quality, inspection and metrology personnel
• Standards committees and technical authors preparing engineering drawings or product specifications

Related standards (normative references)

• ISO 104 (boundary dimensions), ISO 582 (chamfers), ISO 1101 (GPS tolerancing), ISO 14405‑1 (dimensional tolerancing), ISO 22872 (bearing GPS vocabulary), ISO 8015 (GPS fundamentals), ISO/TS 17863 (moveable assemblies), ISO 5593 (vocabulary).

Keywords: ISO 199:2023, thrust bearings, geometrical product specifications, GPS, tolerance values, deviation limits, bearing height, shaft washer, housing washer.