ISO 4666-4 pdf download Rubber, vulcanized — Determination of temperature rise and resistance to fatigue in flexometer testing — Part 4: Constant-stress flexometer Scope This part of ISO 4666 specifies a constant-stress flexometer test for the determination of the temperature riseand resistance to fatique of vulcanized rubbers. Many rubber products, such as tyres and belts, are tested by subjecting them...