ISO 246-2007 PDF

Full title and description

Rolling bearings — Cylindrical roller bearings, separate thrust collars — Boundary dimensions (ISO 246:2007). This International Standard specifies boundary (envelope) dimensions for separate thrust collars used with cylindrical roller bearings in specified diameter series.

Abstract

ISO 246:2007 defines the preferred boundary dimensions (width, maximum outside diameter, bore and minimum bore chamfer) for separate thrust collars intended for use with cylindrical roller bearings in diameter series 0, 2, 3 and 4 as referenced in ISO 15. The standard does not specify overall width or other internal geometric features that depend on specific internal bearing designs.

General information

• Status: Published (confirmed in a routine review).
• Publication date: Edition 3 — 30 July 2007 (commonly recorded as 2007-08); confirmed 27 June 2023.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.100.20 (Rolling bearings and components).
• Edition / version: Edition 3 (2007).
• Number of pages: 4.

Scope

This standard specifies the boundary (envelope) dimensions for separate thrust collars intended to be used with cylindrical roller bearings in diameter series 0, 2, 3 and 4 as defined by ISO 15. It gives values for collar width, maximum outside diameter, bore and minimum bore chamfer. It excludes detailed internal geometry and overall width dimensions that are dependent on the internal design of particular bearings.

Key topics and requirements

• Definition of boundary (envelope) dimensions for separate thrust collars.
• Specified parameters: collar width, maximum outside diameter, bore diameter and minimum bore chamfer.
• Applies to cylindrical roller bearing diameter series 0, 2, 3 and 4 (per ISO 15 designation system).
• Reference / coordination with ISO 15 for diameter-series designations and general boundary-dimension planning.
• Explicit exclusion of overall width and other internal geometrical features that depend on bearing internal design.
• Short, focused 4‑page technical specification suitable for incorporation into product drawings and procurement requirements.

Typical use and users

Used by bearing manufacturers, mechanical designers and engineers, quality and tolerance engineers, procurement/specification teams, maintenance and reliability engineers, and standards committees. Typical applications include selection and specification of separate thrust collars in bearing assemblies, dimension checking during manufacture, and creating interoperable part drawings and catalogs.

Related standards

Closely related to ISO 15 (Rolling bearings — Radial bearings — Boundary dimensions, general plan) which defines diameter-series designations and the general boundary-dimension plan. ISO 246:2007 replaced the earlier ISO 246:1995 edition; users should consult ISO 15 and other rolling-bearing boundary-dimension standards when specifying mating components.

Keywords

cylindrical roller bearings, thrust collars, boundary dimensions, envelope dimensions, bore chamfer, diameter series 0 2 3 4, ISO 15, bearing components, mechanical standards.

FAQ

Q: What is this standard?

A: ISO 246:2007 is an ISO International Standard that specifies the boundary (envelope) dimensions for separate thrust collars used with cylindrical roller bearings (diameter series 0, 2, 3 and 4).

Q: What does it cover?

A: It covers collar width, maximum outside diameter, bore and minimum bore chamfer for separate thrust collars and states which dimensions are not specified because they depend on internal bearing design.

Q: Who typically uses it?

A: Bearing manufacturers, mechanical and design engineers, quality/control personnel, procurement/specifiers and maintenance engineers who need standardized envelope dimensions for mating parts and catalogs.

Q: Is it current or superseded?

A: The published Edition 3 (2007) is the current edition and was confirmed in ISO's routine review (confirmation recorded in 2023). It superseded ISO 246:1995.

Q: Is it part of a series?

A: ISO 246:2007 is a standalone ISO document addressing thrust-collar boundary dimensions for a subset of cylindrical roller bearing diameter series. It references and relies on the diameter-series definitions given in ISO 15, which is the general plan for rolling-bearing boundary dimensions.

Q: What are the key keywords?

A: Cylindrical roller bearings; thrust collars; boundary/envelope dimensions; bore chamfer; diameter series; ISO 15.