Describes the compression flexometer test for determination of temperature rise and resistance to fatigue of vulcanized rubbers. The Goodrich flexometer is specified, but any other apparatus giving equivalent performance may be used. Gives directions for carrying out measurements which make predictions regarding durability of rubbers in finished articles (tyres, bearings, supports, V belts, cable pulley insert rings and similar products subject to dynamic flexing in service). However, no simple correlation between the accelerated tests described and service performance can be assumed. Not recommended for rubber with a hardness greater than 85 IRHD.

BS ISO 4666-3 : 2016