Measure the center-to-center distance between your two pulleys, then calculate: Perimeter ≈ 2 × center distance + (π × pitch diameter of each pulley). Alternatively, wrap a flexible tape measure around both pulleys to get the loop length directly. For reference, 2001mm ≈ 78.8" and 2889mm ≈ 113.7". Always round to the nearest available size listed in the variant options above.

HTD stands for High Torque Drive. The "3M" designation means a 3mm pitch (tooth-to-tooth distance) with a curvilinear (rounded) tooth profile. Compared to trapezoidal profiles like MXL or XL, HTD3M generally offers better load distribution and reduced tooth jump under moderate torque, making it well-suited for precision motion applications such as 3D printers and CNC routers.

Actual load capacity depends on pulley tooth count, speed, and operating conditions. Polyurethane HTD3M belts with steel wire reinforcement typically handle moderate torque loads suitable for 3D printers, CNC routers, and light robotics. For heavy industrial drives, contact us to confirm suitability before ordering.

Polyurethane offers better resistance to oils, mild chemicals, and moisture compared to neoprene rubber belts. However, prolonged exposure to standing water, UV radiation, or harsh solvents may reduce belt life. For outdoor or washdown environments, verify operating conditions before use and contact us to confirm suitability.

Yes. This belt follows the standard HTD3M tooth profile (3mm pitch, curvilinear tooth form) and is designed to mesh with any standard HTD3M pulley. Confirm your pulley's belt width groove matches 20mm before ordering — using a narrower groove pulley with a 20mm belt will cause misalignment.

Select 1 pcs if you need a single replacement belt. Choose 2 pcs if you are building a dual-axis system, want a spare on hand, or are outfitting multiple machines at once — the 2-piece pack typically offers a lower per-belt cost.

The steel wire tension members run longitudinally through the belt body to resist elongation under load. This keeps positioning accuracy consistent over time. Polyurethane/steel-wire belts generally exhibit less creep than rubber belts, making them a common choice for CNC and 3D printer axes where dimensional repeatability matters.