Greatest radial distance, in any equatorial plane, between the smallest circumscribed sphere and the greatest inscribed sphere, with their centres common to the least square sphere centre. Ball lot. -. Defines quantity of balls manufactured under conditions presumed uniform and which is considered as an entity.

The boundary dimensions of commonly used bearings mostly conform to the organizational concept of ISO, and the bearing numbers of these standard bearings.

Type. ISO/TC 123/SC 2. Materials and lubricants, their properties, characteristics, test methods and testing conditions. Sub committee. ISO/TC 123/SC 3. Dimensions, tolerances and construction details. Sub committee. ISO/TC 123/SC 5. Quality analysis and assurance.

Scope. Standardization of all types and all sizes of bearing elements based on the principle of rolling motion, including the lubrication, their accessories, application and identification and

and running accuracy, are regulated by ISO and JIS standards, JIS B 1514 (rolling bearing values for radial bearing inner ring tapered bores.

bearings - Dynamic load ratings and rating life ISO 76 : 1990 Rolling bearings - Static load ratings NSI Related international standards 

This part of IS0 12240 specifies dimensions, tolerances and radial internal clearances for various dimension series of spherical plain bearing rod ends. The dimensions and toleran

Unmarked or unspecified bearings have a clearance of CN which is normal clearance. The bearing clearance is not a fixed number and varies with the size of the bearing, it is defined in JIS/ISO/DIN standards. The diagram below depicts bearing clearance. A table of bearing clearance cross references is shown below.

ISO(ISO Bearing standards) · Plain bearings Bearing fatigue Part 1: Plain bearings in test rigs and in applications under conditions of hydrodynamic lubrication ISO 95 ..2: ISO Bearings is the sole importer of ISO branded bearings and power transmission products. The brand was introduced to South Africa in 2007 after the company identified a

This Standard specifies the requirement for high carbon chromium bearing steels (hereafter referred to as steels) used for roller 

1 "ABEC" is applied for ball bearings and "RBEC" for roller bearings. Notes 1: JIS B 1514, ISO 492 and 199, and DIN 620 have the same specification level. 2: The tolerance and allowance of JIS B 1514 are a little different from those of ABMA standards.

1. ISO (International Organization for Standardization) This is the most widely and rigorous applied international standard, especially in the manufacturing industry. Bearings need to conform not only tolerances, dimensions, but also materials as well as performance and suitability for each device and environment.

DIN 616 describes dimension plans for radial and axial bearings. An overview of ISO and DIN rolling bearing standards is given in DIN 611:2010-05.

ISO 2015. Rolling bearings and spherical plain bearings — Search structure for electronic media — Characteristics.

1.1 ISO Dimensional system​​ The ISO dimensional system specifies the following dimensions for rolling bearings: bore diameter, d, outside diameter, D, width, B, 

Standards; About us; News; Taking part; Store; Search Cart. ICS 21. 21.100 Bearings. ICS Field; 21.100.01: Bearings in general: 21.100.10: Plain bearings: 21.100.20: Rolling bearings: Store; Reserved All ISO publications and materials are protected by copyright and are subject to the user's acceptance of ISO's conditions of copyright

In this document, bearing life is as described in ISO 281[1], which provides formulae to calculate bearing life taking a number of factors into consideration, such as bearing load carrying capacity, bearing load, type of bearing, material, bearing fatigue load limit, lubrication conditions and degree of contamination.

Please note that there are different standards for metric deep groove ball bearings and inch ball bearings, as well as ISO cylindrical roller bearings and 

Rolling bearings — Radial bearings —. Boundary dimensions, general plan. Roulements — Roulements radiaux — Dimensions d'encombrement, plan général. STANDARD.

The ISO general plan for radial bearings provides several series of standardized outside diameters for every standard bore diameter.

ISO 492: Rolling bearings - Radial bearings - Geometrical product specifications (GPS) and tolerance values. are now aligned with general ISO GPS standards like ISO 1101 and ISO 5459. This e-learning includes information about the content of ISO 199: and ISO 492: and describes the changes to the former version.