21.100.20 - Rolling bearings

This document specifies the dimensional and geometrical characteristics, boundary dimensions and tolerances of insert bearings and eccentric locking collars and the radial internal clearances of insert bearings.

This document specifies bearing and subunit boundary dimensions for complete single-row and double-row tapered roller bearings. It also specifies the flange dimensions of flanged outer rings for a selection of these bearings. A series designation for each bearing is also specified.

This document specifies vibration measuring methods for double-row radial spherical roller bearings
and single-row and double-row radial tapered roller bearings, with cylindrical bore and outside surface
and a contact angle up to and including 45°, under established measuring conditions.

ISO 15242-4:2017 specifies vibration measuring methods for single-row and double-row radial cylindrical roller bearings with cylindrical bore and outside surface, under established measurement conditions.

This document establishes a vocabulary of terms, with their definitions, applied in the field of rolling bearings and their technology under ISO Technical Committee TC 4 management.
It includes terms related to all types of rolling bearings wherein the principal degree of freedom is continuous rotation about an axis enabled by an ordered set of rolling elements between two circular raceways such that loads can be transmitted between them in a particular range of radial and/or axial directions. ...view more

This document specifies the testing and evaluation method of rolling bearing grease noise in accordance with the method MQ.

This document specifies: — basic principles, testing assembly and the test machine for noise testing of rolling bearing greases; — symbols used in the test methods BQ+, MQ and NQ. This document is applicable for testing rolling bearing greases, especially of unused grease. NOTE Suitable greases are greases of NLGI classes 1 to 3 according to DIN 51818[6]. Suitable greases for lubrication of rolling bearings are especially greases according to ISO 12924. The test method according to this document...view more

This document specifies the testing and evaluation method of rolling bearing grease noise in accordance with the method NQ.

ISO 15:2017 specifies preferred boundary dimensions for radial bearings of the diameter series 7, 8, 9, 0, 1, 2, 3 and 4.

ISO 15312:2018 defines the thermal speed rating for oil bath lubricated rolling bearings and defines calculation principles for the determination of this parameter. The parameter determined in accordance with this document applies to rolling bearings of the given series and sizes of standard design or of a design that, from a frictional point of view, can be related to a standard design bearing.
In most cases of standard assembly, the permissible temperature determines the maximum operating spe...view more

This document specifies the testing and evaluation method of rolling bearing grease noise in accordance with the method BQ+.

ISO 14728-1:2017 specifies methods of calculating the basic dynamic load rating and basic rating life for linear motion rolling bearings manufactured from contemporary, commonly used, high quality, hardened bearing steel in accordance with good manufacturing practice and basically of conventional design as regards the shape of the rolling contact surfaces. The life of linear motion rolling bearings is defined and the conditions are established for reliable life calculations.
ISO 14728-1:2017 is...view more

ISO 14728-2:2017 specifies methods of calculating the basic static load rating, static equivalent load and static safety factor for linear motion rolling bearings manufactured from contemporary, commonly used, high quality, hardened bearing steel in accordance with good manufacturing practice and basically of conventional design with regard to the shape of the rolling contact surfaces.
ISO 14728-2:2017 is not applicable to designs where the rolling elements operate directly on the slide surface...view more

This document specifies dimensional and geometrical characteristics, nominal boundary dimensions and tolerance values for finished steel needle rollers used as rolling elements.

ISO 7063 specifies dimensional characteristics, nominal boundary dimensions and tolerance values for needle roller bearing track rollers, yoke and stud types.

ISO 1206 specifies the boundary dimensions and normal class tolerance values for needle roller bearings with machined rings. This document specifies dimensional and geometrical characteristics, and limit deviations from nominal sizes. These specifications apply to complete needle roller bearings and to bearings without inner ring.

This document classifies different modes of failure occurring in service for rolling bearings made of
standard bearing steels. For each failure mode, it defines and describes the characteristics, appearance
and possible root causes of failure. It will assist in the identification of failure modes based on
appearance.
For the purposes of this document, the following terms are explained:
— failure of a rolling bearing: the result of a damage that prevents the bearing meeting the intended
des...view more

This document specifies the dimensional and geometrical characteristics, boundary dimensions and tolerances of insert bearings and eccentric locking collars and the radial internal clearances of insert bearings.

This document specifies bearing and subunit boundary dimensions for complete single-row and double-row tapered roller bearings. It also specifies the flange dimensions of flanged outer rings for a selection of these bearings. A series designation for each bearing is also specified.