jaw crusher V-Belt

V-belts, critical flexible drives in jaw crushers, transmit power between motor and eccentric shaft pulleys via friction, featuring shock absorption and overload protection. Composed of a tensile layer (polyester cords/aramid), top/bottom rubber (60–70 Shore A hardness), and a cover fabric, they adopt a trapezoidal cross-section (e.g., SPB type) for pulley groove compatibility. Manufacturing involves rubber mixing (120–150°C), belt blank winding, vulcanization (140–160°C, 1.5–2.5 MPa), and post-stretching. Quality control includes testing tensile strength (≥10 kN for SPB), friction coefficient (≥0.8), and dimensional accuracy (length deviation ±0.5%). With a 3000–5000-hour service life, they require proper tensioning and simultaneous replacement of belt sets to ensure stable crusher operation