Poly-V belts have triangular section longitudinal ribs. Thanks to the reduced thickness, these belts are very flexible and can be wind up on very small diameters. Poly-V belts can achieve higher peripheral speed than V-belts.
SIT Poly-V pulleys for mounting taper bushing are designed and manufactured with extreme accurancy to ensure optimal lifetime and performance of the transmission systems. The pulleys are manufactured in accordance with ISO 1940.