ISO 21250-1-2020 滚动轴承--滚动轴承润滑脂的噪音试验--第1部分:基本原理、试验组件和试验机 Rolling bearings — Noise testing of rolling bearing greases — Part 1: Basic principles, testing assembly and test machine

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 . 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 .st edition 2020-07 Rolling bearings — Noise testing of rolling bearing greases — Part 1: Basic principles, testing assembly and test machine Roulement — Essais de bruit de graisse pour roulement — Partie 1: Règles de base, arrangement d'essais, machine de test Reference number ISO 21250-1:2020(E) ？ ISO 2020 ISO 21250-1:2020(E) COPYRIGHT PROTECTED DOCUMENT ？ ISO 标准截图