Full definition
Consumable component in industrial clutches and brakes that provides the friction force to engage or arrest torque transmission. Materials range from organic resin composites (woven or molded, for moderate duty, coefficient of friction 0.25-0.45), to sintered metallic (bronze or iron-based, for heavy duty and oil-immersed operation, COF 0.05-0.15 wet), to ceramic (extreme heat and fade resistance, for racing and heavy presses). Disc dimensions: OD 50-1500 mm, thickness 2-12 mm. Rated by torque capacity and thermal energy absorption. Wear limit typically 50% of original thickness. Per DIN 15435. Brands: Ortlinghaus, Eaton Airflex, Desch. Replace in sets; never mix old and new discs.