Polyurethane Round Drive Belt – Smooth Surface Transmission Belt Ø1.5mm to Ø20mm

Match the belt diameter to your pulley groove width. Typically, the belt should fit snugly in the groove without bottoming out. Common sizes range from Ø1.5mm (≈1/16") for light-duty applications up to Ø20mm (≈25/32") for heavier drives. When in doubt, measure your existing belt or groove with calipers and select the closest available diameter.

Measure the center-to-center distance between your pulleys and calculate the total belt path length. Add roughly 2–5% extra for tensioning. We offer lengths from 1 to 50 meters so you can order exactly what you need. For joined continuous loops, add extra length for the splice overlap — generally 20–30mm per join is a reasonable allowance.

Load capacity depends on the belt diameter, drive speed, and pulley geometry. Generally, larger diameters handle greater torque. Polyurethane round belts are typically suited for light-to-medium duty power transmission applications. For critical load calculations or high-torque drives, contact us to confirm suitability for your specific application.

Polyurethane offers good resistance to oils, greases, and mild chemicals, making it generally suitable for light industrial and indoor environments. It performs reasonably well in damp conditions. For prolonged outdoor UV exposure or immersion in harsh chemicals or solvents, contact us to confirm compatibility before ordering.

These round drive belts are designed for round-groove pulleys and sheaves. They are commonly used in textile machinery, conveyor systems, woodworking equipment (lathes, bandsaws), and light industrial drives. Verify that your pulley groove radius matches the belt diameter you select. They are not suitable for V-groove or flat belt pulley systems.

Yes. Polyurethane round belts can generally be joined using a hot-splice method — heat both cut ends and press them together firmly for a seamless bond. Mechanical connectors are also an option for quick field repairs. Splicing tools and connectors are available separately. Allow adequate cooling time before running the belt under load to ensure a strong join.

Polyurethane round belts typically operate in a range of approximately -20°C to +80°C (-4°F to 176°F). Performance may degrade at temperature extremes. If your application involves sustained high heat or sub-zero conditions, contact us to confirm suitability before ordering.