Taper Bushing Poly-Rib (Multi-Rib) Pulleys

Efficient Power Transmission in Compact Designs

Uni-Drive supplies a comprehensive range of Poly-Rib (Multi-Rib) pulleys designed for high-speed, high-torque applications. These pulleys, commonly known as Poly-Vee or Multi-Vee, deliver exceptional power transfer through increased frictional contact across multiple ribs. The thin cross-section profile allows for compact drive layouts using smaller pulley diameters without compromising performance.

Key Characteristics

• Large speed ratios with stable power delivery

• High efficiency and excellent power transmission capacity

• Minimal slip with positive belt grip

• Largely resistant to oil, heat, and environmental factors

• Smooth, vibration-free, and quiet operation

• Long service life with high resilience under dynamic loads

Standard Supply Range

Uni-Drive maintains extensive ready stock for standard Poly-Rib pulleys, with custom machining available upon request. Special diameters, number of ribs, or bore configurations can be made to order — contact our Applications Engineering team for tailored drive solutions.

Profile PJ
Diameter: 20 – 315 mm
Number of Ribs: 3, 4, 5, 6, 8, 12, 16, 20

Profile PK
Diameter: 20 – 315 mm
Number of Ribs: 7, 16, 23, 31

Profile PL
Diameter: 80 – 315 mm
Number of Ribs: 5, 6, 8, 10, 12, 16, 20, 23

Profile PM
Diameter: 180 – 710 mm
Number of Ribs: 6, 8, 10, 12, 16, 20