ISO 31657-1:2025

International Standard   Current Edition · Approved on 16 October 2025

Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 1: Calculation of multi-lobed and tilting pad journal bearings

ISO 31657-1:2025 Files

English 38 Pages
Current Edition
USD 231.62

ISO 31657-1:2025 Scope

This document specifies the general principles, assumptions and preconditions for the calculation of multi-lobed and tilting-pad journal bearings by means of an easy-to-use calculation procedure based on numerous simplifying assumptions.

The calculation method applies to the design and optimisation of plain bearings, for example in turbines, compressors, generators, electric motors, gears and pumps. It is restricted to steady-state operation, i.e. in continuous operating states the load according to size and direction and the angular velocity of the rotor are constant.

Best Sellers

GSO 150-2:2013
 
Gulf Standard
Expiration dates for food products - Part 2 : Voluntary expiration dates
YSMO GSO 150-2:2020
GSO 150-2:2013 
Yemeni Technical Regulation
Expiration dates for food products - Part 2 : Voluntary expiration dates
GSO 9:2022
 
Gulf Technical Regulation
Labeling of prepackaged food stuffs
YSMO GSO 2055-1:2020
GSO 2055-1:2015 
Yemeni Standard
HALAL FOOD - Part 1 : General Requirements

Recently Published

GSO CXS 320:2026
CXS 320:2022 
Gulf Technical Regulation
Quick Frozen Vegetables
GSO 2830:2026
 
Gulf Technical Regulation
Flavored concentrated drinks
ISO/TS 20451:2026
 
International Standard
Health informatics — Identification of medicinal products — Implementation for ISO 11616 data elements and structures for the unique identification and exchange of regulated pharmaceutical product information
ISO 20999:2026
 
International Standard
Textiles — Determination of total halogens in textile products — Combustion and ion chromatography (C-IC) method