Full definition
A conveyor belt with rubber covers specifically formulated to withstand severe surface wear from sharp, abrasive materials such as crushed rock, ore, slag, and sand. Cover rubber grades per ISO 14890: Category H (highest abrasion resistance, volume loss ≤120 mm³), Category D (high resistance, ≤150 mm³), Category L (normal, ≤200 mm³). DIN 22102 grades: Y (≤150 mm³), W (≤100 mm³ — premium). Abrasion testing per ISO 4649 (DIN rotary drum abrasion tester). Typical formulations: natural rubber (NR) or NR/BR blends, 45-60 Shore A, with high carbon black loading. Top cover thickness: 4-10 mm depending on material abrasiveness and conveyor throughput. Thicker covers extend replacement intervals but add belt weight and cost. NR compounds offer 2-3x the abrasion resistance of SBR. Applications: mining, quarrying, cement, steel, and aggregate. Replace when cover thickness reaches 1-2 mm over the carcass to prevent carcass exposure and rapid failure.