Brake friction material compressibility tests

If the friction material of a brake pad or brake shoe is too compressive the application of the brake will not feel positive and firm. It is therefore important to verify that the material does not compress excessively when a pressure is applied to it. Cold and hot compressibility tests are therefore conducted on brake pads and brake linings in order to establish their compressibility.

The Economic Commission for Europe Regulation 90 for the approval of replacement brake lining assemblies and drum brake linings for power driven vehicles and their trailers specifies a maximum limit for brake friction compressibility when tested according to the requirements of the International Standards Organization specification ISO 6310.

These cold and hot brake friction compressibility requirements are tested on equipment specifically designed to conduct these tests on brake pads and brake shoes in accordance with the requirements of ISO 6310.

ECE90 brake Testing is the only test laboratory in South Africa with the required specialized equipment to conduct brake friction compressibility testing..

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