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The first asbestos brake linings were developed in 1908 by Herbert Frood. [1] Although Frood was the first to implement the use of asbestos brake linings, the heat dissipation properties of the fibres were tested by various scientists, including materials chemist Gwilym Price, who did most of his research and testing at Cambridge, United ...
However, as the serious health-related hazards of asbestos eventually started to become apparent, other materials had to be found. Asbestos brake pads have largely been replaced by non-asbestos organic (NAO) materials in first world countries. [9] Today, brake pad materials are classified into one of four principal categories, as follows:
WVA numbers (Waren-Vertriebs-Artikel-Nummern) are a reference and assignment system for brake linings, clutch facings, brake shoes and other friction materials which will especially be used in road vehicles but also in mechanical engineering.
Mac's Spring & Brake Service shop, with Raybestos brakes (ca. 1930-1945). In 1906, Raymond and Law invented the woven brake lining, an important innovation in automotive brakes. From 1919 to 1989 Raybestos brand was manufactured by Raymark Industries, Inc, of Stratford, Connecticut. Raymark Industries filed for Chapter 11 bankruptcy in 1998. [2]
composite materials; asbestos replacement (e.g. brake linings) hot air filtration fabrics; tires, newly as Sulfron (sulfur-modified Twaron) mechanical rubber goods reinforcement; ropes and cables [16] V-belts (automotive, machinery, equipment, and more) wicks for fire dancing; optical fiber cable systems; sail cloth (not necessarily racing boat ...
[citation needed] All brake linings are cured under mechanical pressure following a heating and cooling curve backstroke, heating the friction material up to 232 °C (450 °F) to "cure" (cross-link) the phenolic resin thermoset polymers: There is no melting of the binding resins, because phenolic resins are thermoset, not thermoplastic. In this ...
His invention initially used solid woven cotton impregnated with natural resins for brake pads (friction linings). Later phenol formaldehyde resins were used. Frood became Joint Managing Director of Ferodo with William Horrocks. On 21 January 1920, Ferodo Ltd. was floated on the London Stock Exchange. Frood retired in 1927.
Asbestos was used in the brake pads but its use declined when the negative health impact was discovered. In 1989 BMW released the first motorcycle to be equipped with anti-lock brakes (ABS). The system fitted to the BMW K100 LT weighed significantly more than the light weight systems fitted to modern motorcycles.
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