ISO 17956:2025

International Standard   Current Edition · Approved on 10 January 2025

Rolling bearings — Method for calculating the effective static safety factor for universally loaded rolling bearings

ISO 17956:2025 Files

English 10 Pages
Current Edition
31.19 OMR

ISO 17956:2025 Scope

This document specifies the calculation of the effective static safety factor under consideration of tilt or misalignment, operating clearance of the bearing, and internal load distribution on rolling elements. The calculation method provided in this document covers influencing parameters in addition to those described in ISO 76.

The directions and limitations given in ISO 76 and ISO 20056-2 apply to this document. The calculation method pertains to the static safety factor of the bearings. Other mechanisms of failure, like false brinelling, fatigue life, wear or microspalling (gray-staining), lie outside the scope of this document.

This document applies to single and multi-row radial and thrust ball and roller bearings, subjected to radial and axial load and with radial clearance and tilt taken into account. References to methods for the analysis of the internal load distribution under general load are given.

The analysis of effective static safety factor for multi-row bearings or bearings of a more complex geometry can be derived from the formulae given in this document. For these bearings, the load distribution for each individual row is considered.

The calculation of effective static safety factor is also applicable to hybrid bearings, using the static load ratings according to ISO 20056-2.

Best Sellers

GSO 150-2:2013
 
Gulf Standard
Expiration dates for food products - Part 2 : Voluntary expiration dates
OS GSO 150-2:2013
GSO 150-2:2013 
Omani Standard
Expiration dates for food products - Part 2 : Voluntary expiration dates
OS GSO 2055-1:2015
GSO 2055-1:2015 
Omani Standard
HALAL FOOD - Part 1 : General Requirements
GSO 2055-1:2015
 
Gulf Technical Regulation
HALAL FOOD - Part 1 : General Requirements

Recently Published

ISO 20589:2025
 
International Standard
Glass in building — Determination of the emissivity
ISO 11265:2025
 
International Standard
Environmental solid matrices — Determination of the specific electrical conductivity
ISO 11465:2025
 
International Standard
Sludge and solid environmental matrices — Determination of dry residue or water content and calculation of the dry matter fraction on a mass basis
ISO 9350:2025
 
International Standard
Corrosion of metals and alloys — Testing method of corrosion resistance for hafnium at high temperature and pressure