Measure the center-to-center distance between your pulleys, then use the formula: Perimeter ≈ 2 × C + π × (D1 + D2) / 2. For example, a 1500mm (≈59.1") belt generally suits a drive with roughly 700mm center distance and standard HTD pulleys. Always verify against your machine's spec sheet before ordering. If replacing an existing belt, measure the old belt's outer circumference directly.

Divide the mm value by 25.4. Quick reference: 1308mm ÷ 25.4 ≈ 51.5"; 1500mm ÷ 25.4 ≈ 59.1"; 1998mm ÷ 25.4 ≈ 78.7". Use this to cross-reference with imperial-spec machines or documentation.

A 20mm wide HTD 3M polyurethane belt with steel wire tensile cords can typically transmit higher torque than a standard rubber belt of the same width. Exact capacity depends on pulley tooth count, operating speed, and wrap angle. In most cases this belt is suitable for light-to-medium duty CNC, 3D printing, and robotic actuator applications. Contact us to confirm suitability for high-load industrial drives.

Yes. This belt follows the HTD 3M tooth profile standard (3mm pitch, rounded curvilinear tooth form), so it is compatible with any HTD 3M pulley of the appropriate width. Confirm your pulley groove width accommodates a 20mm belt before ordering.

Polyurethane timing belts generally offer better resistance to oils, mild chemicals, and moisture than rubber belts. However, prolonged UV exposure or immersion in water is not recommended. For outdoor installations, shield the belt from direct sunlight when possible to extend service life.

Yes. HTD 3M belts are widely used in 3D printers, CNC routers, laser cutters, and robotic actuators where precise, low-backlash motion is required. The steel wire core provides dimensional stability under tension, which is important for positional accuracy in these applications.

Both options ship the same belt at the same perimeter. Choosing 2 pcs gives you a spare or allows you to equip two axes simultaneously. The 2-pcs pack is priced at a discount compared to purchasing two single units separately.