Measure the center-to-center distance between your two pulleys, then calculate the belt perimeter using the standard formula: Perimeter ≈ 2 × C + π × (D1 + D2) / 2, where C is center distance and D1/D2 are pulley pitch diameters. For example, a 1440mm (≈56.7") belt typically suits a center distance of around 680–700mm with standard 3M pulleys. When in doubt, size up — a slightly longer belt can generally be tensioned; a belt that's too short cannot be installed.

'3M' refers to a 3mm tooth pitch (distance between tooth centers), and 'HTD' stands for High Torque Drive — a curvilinear tooth profile designed to reduce stress concentration and improve load distribution compared to trapezoidal (MXL/XL) profiles. HTD belts generally handle higher torque at lower speeds and are widely used in CNC routers, 3D printers, and servo-driven axes.

These belts use steel cord tensile members embedded in a polyurethane body, which typically provides tensile strength significantly higher than neoprene/fiberglass alternatives. Wider belts (20mm, 30mm) carry proportionally higher loads. For precise load ratings, refer to your application's torque requirements and contact us to confirm suitability for heavy-duty use.

Polyurethane (PU) timing belts generally offer good resistance to oils, greases, and many common industrial fluids, making them suitable for light-duty outdoor or mildly contaminated environments. However, prolonged UV exposure or immersion in aggressive solvents may degrade performance over time. For harsh outdoor applications, confirm compatibility with your specific conditions before ordering.

This belt is designed for standard 3M HTD pulleys (3mm pitch, HTD tooth profile). It is not interchangeable with GT2, T5, T10, or trapezoidal-profile pulleys of the same pitch. Always verify that your pulley is specifically rated for 3M HTD profile. The belt width must also match or be narrower than the pulley flange width.

Divide the mm value by 25.4. Quick reference:

• 1401mm ÷ 25.4 ≈ 55.2"
• 1440mm ÷ 25.4 ≈ 56.7"
• 1461mm ÷ 25.4 ≈ 57.5"
• 1497mm ÷ 25.4 ≈ 58.9"

All perimeter options are selectable in the variant dropdown above.

Width selection depends on the torque and lateral load your application requires. Narrower belts (10mm) are typically used in light-duty 3D printers and small CNC axes. Wider belts (20mm, 30mm) are suited for higher-torque servo drives, robotic joints, or industrial automation where side loads are greater. In most cases, match the belt width to your pulley's usable face width.