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ISO 21250-1:2020

Rolling bearings — Noise testing of rolling bearing greases — Part 1: Basic principles, testing assembly and test machine

Jul 13, 2020

General information

90.93     Jan 9, 2026

ISO

ISO/TC 4/SC 13

International Standard

21.100.20  

English  

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Scope

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 delivers meaningful results for rolling bearings; however, it can also be applied for greases in similar applications[12][13].

Life cycle

NOW

PUBLISHED
ISO 21250-1:2020
90.93 Standard confirmed
Jan 9, 2026