Open Timing Belt — 2GT / HTD-3M / HTD-5M / HTD-8M / S2M / S3M / S5M / S8M | PU White Synchronous Belt

Measure the center-to-center distance between your two pulleys, then calculate the required belt path length. For open-ended belts, you typically cut to the exact length needed on-site. As a reference: 1 Meter ≈ 39.4", 2 Meter ≈ 78.7", 5 Meter ≈ 196.9". When in doubt, order slightly longer and trim to fit — PU belts cut cleanly with a sharp utility knife or shears.

The profile must match your pulley's tooth profile exactly — they are not interchangeable. 2GT is widely used in 3D printers and light CNC machines. HTD-3M/5M/8M are rounded-tooth profiles suited for moderate-to-high torque drives. S2M/S3M/S5M/S8M are trapezoidal profiles common in general industrial and automation equipment. Check your pulley specification or the markings on your existing belt before ordering.

Belt width should match or be slightly narrower than your pulley's usable face width. Wider belts generally carry higher loads. Available widths are 6mm (≈1/4"), 10mm (≈3/8"), 15mm, 20mm, 25mm, and 30mm (≈1-3/16"). For light-duty applications such as 3D printers, 6mm or 10mm is typically sufficient. For heavier CNC or industrial synchronous belt drives, 15mm–30mm widths are generally recommended.

Load capacity depends on the belt profile, width, and pitch. Wider belts and larger-pitch profiles (e.g., HTD-8M, S8M) generally support higher torque than narrow, fine-pitch belts (e.g., 2GT 6mm). For specific load ratings, please contact us — we can provide technical data sheets for each profile upon request.

Polyurethane (PU) timing belts generally offer good resistance to oils, mild chemicals, and moderate humidity. However, prolonged UV exposure or immersion in water is not typically recommended for standard PU belts. For outdoor or washdown environments, contact us to confirm suitability for your specific conditions before ordering.

Yes, open timing belts can generally be joined using compatible belt clamps, steel-core connectors, or PU welding. The joining method depends on your application's speed and load requirements. For high-speed or high-tension closed loops, a welded joint is typically more reliable than a mechanical clamp. Contact us if you need guidance on joining hardware.

These PU timing belts are reinforced with steel wire cords embedded along the belt's length. The steel core resists elongation under load and maintains accurate tooth pitch spacing over time — which is critical for positioning applications like CNC machines and 3D printers where even small belt stretch can cause dimensional errors.