Measure the center-to-center distance between your two pulleys, then use the standard belt length formula: Perimeter ≈ 2 × C + π × (D1 + D2) / 2, where C is the center distance and D1/D2 are the pulley pitch diameters. For example, a 1320mm belt (≈51.97" circumference) is generally suited to mid-span CNC axis drives. Always round up to the nearest available 3mm increment and verify against your pulley tooth count.

HTD 3M belts are designed for light-to-medium power transmission. Wider belts (20mm, 30mm) carry proportionally higher loads than narrower ones (10mm, 15mm). Actual capacity depends on pulley diameter, operating speed, and wrap angle. For precise torque ratings, refer to your drive system's engineering requirements or contact us to confirm suitability.

Polyurethane (PU) timing belts generally offer better resistance to oils, mild chemicals, and moderate humidity compared to neoprene belts. However, prolonged UV exposure or water immersion is not recommended. For outdoor installations, shielding the belt from direct sunlight will typically extend service life.

Yes. This belt follows the HTD 3M tooth profile standard — 3mm pitch, rounded tooth form — and is compatible with any HTD 3M pulley of matching width. It is not interchangeable with GT2, T2.5, T5, or other trapezoidal-tooth pulleys. Confirm your pulley's tooth profile is HTD 3M before ordering.

Wider belts transmit more torque and resist lateral flex better. For lightweight 3D printer carriages and small CNC routers, 10mm or 15mm is typically sufficient. For heavier gantry systems or higher-torque servo drives, 20mm or 30mm is generally recommended. Always match the belt width to your pulley's flange width to prevent the belt from riding off the pulley.

The steel cord tensile member embedded in the PU body provides very low elongation under load — a critical property for positional accuracy in CNC routing and 3D printing. It maintains consistent pitch length over the belt's service life, reducing the frequency of re-tensioning and helping prevent axis drift or layer-shift artifacts.

No. This is a factory-welded closed-loop belt. Cutting and re-joining requires specialized ultrasonic or thermal welding equipment and is not practical in a typical workshop setting. Select the perimeter size closest to your calculated requirement from the available variants listed above.

Divide the perimeter in mm by 25.4 to get inches. Quick reference: 1302mm ≈ 51.3", 1320mm ≈ 51.97", 1350mm ≈ 53.15", 1380mm ≈ 54.33", 1398mm ≈ 55.04". Use these values when cross-referencing with imperial-unit drive system specifications.