Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
  4.1 Symbols
  4.2 Abbreviated terms
5 Test conditions and preparation
  5.1 Inertia for the front axle
  5.2 Inertia for the rear axle
  5.3 Test wheel load
  5.4 Pressure ramp rate
  5.5 Maximum pressure
  5.6 Pressure level with no power assist
  5.7 Sampling rate
  5.8 Initial brake temperature
  5.9 Brake warm-up
  5.10 Temperature measurement
  5.11 Brake fluid displacement measurement
  5.12 Cooling air conditions
  5.13 Cooling air velocity or volume
  5.14 Conditioning settings for temperature and absolute
       humidity (humidity ratio)
  5.15 Dynamometer rotational speed between brake applications
  5.16 Orientation of brake set-up
  5.17 Direction of air concerning brake set-up
  5.18 Brake cooling rate
  5.19 Wear measurement
  5.20 Lateral run-out
  5.21 Rotor or drum condition
  5.22 Fade sections
  5.23 Data collection
6 Test procedures
  6.1 Test procedure for product monitoring with no optional
       brake applications
  6.2 Test procedure for product development with additional
       brake applications
  6.3 Standard friction values calculated during test procedure
7 Test report
  7.1 General
  7.2 Graphical report
  7.3 Tabular data for each brake application
  7.4 Wear measurements
  7.5 Test conditions
  7.6 Cooling air conditions
  7.7 Brake cooling rate
  7.8 Friction values
  7.9 Statistical analysis
Annex A (informative) - Sample report for disc brakes
Annex B (informative) - Histograms for instantaneous friction
                        values
Annex C (informative) - Reference calculations for cooling air
                        speed and flow
Bibliography

Abstract

Specifies a test procedure for assessing the influence of pressure, temperature, and linear speed on the coefficient of friction of a given friction material in combination with a specific mating component (rotor or drum).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Organization for Standardization
Pages
ISBN
Committee	TC 22
Supersedes	ISO/DIS 26867 : 60.00 (2009)