ISO 20120:2025Published

Lubricants — Determination of the coefficient of friction of synchronizer lubricated by manual transmission fluids (MTF) — High-frequency, linear-oscillation (SRV) test machine

Lubrifiants — Détermination du coefficient de frottement d'un synchroniseur lubrifié par des fluides de transmission manuelle (MTF) — Machine d'essai à oscillation linéaire à haute fréquence (SRV)

Abstract / scope

This document specifies a test method for determining the coefficient of friction and its evolution in mechanical transmission fluids tribologically interacting with materials used in synchronizers in manual transmission (MT) gears under high-frequency linear oscillation motion using the linear-oscillation (SRV) test machine. A flat areal contact geometry is applied.