ISO 14635-1:2023
Gears — FZG test procedures — Part 1: FZG test method A/8,3/90 for relative scuffing load-carrying capacity of oils
This document specifies a test method based on a FZG four-square test machine to determine the relative load-carrying capacity of lubricating oils defined by the gear-surface damage known as scuffing. High surface temperatures due to high surface pressures and sliding velocities can initiate the breakdown of the lubricant films. This test method can be used to assess such lubricant breakdown under defined conditions of temperature, high sliding velocity and stepwise increased load.
NOTE This method is technically equivalent to ASTM D 5182-19 and CEC L-07-A-95.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Brief description of method
4.1 General principle
4.2 Precision
5 Test materials
5.1 Test gears
5.2 Cleaning fluid
6 Apparatus
6.1 FZG spur-gear test rig
6.2 Heating device
6.3 Revolution counter
7 Preparation of apparatus
8 Test procedure
9 Reporting of results
Annex A (informative) Typical FZG test report sheet
Annex B (informative) Checklist for maintenance of FZG gear test rig
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Brief description of method
4.1 General principle
4.2 Precision
5 Test materials
5.1 Test gears
5.2 Cleaning fluid
6 Apparatus
6.1 FZG spur-gear test rig
6.2 Heating device
6.3 Revolution counter
7 Preparation of apparatus
8 Test procedure
9 Reporting of results
Annex A (informative) Typical FZG test report sheet
Annex B (informative) Checklist for maintenance of FZG gear test rig
Bibliography