Measure the center-to-center distance between your two pulleys, then use the standard belt length formula:

Belt Length ≈ 2 × C + π × (D1 + D2) / 2

Where C = center distance, D1 and D2 = pitch diameters of each pulley. Round up to the nearest available size in the variant selector. For example, a calculated length of 995mm would round up to 1000mm. When in doubt, size up — a slightly longer belt can be tensioned; a short belt cannot be installed.

To convert inches to mm: multiply by 25.4. Example: 40" × 25.4 = 1016mm → select 1020-5M.

HTD stands for High Torque Drive. The "5M" means a 5mm tooth pitch (center-to-center distance between teeth). HTD belts use a curved (round) tooth profile, which distributes load more evenly than older trapezoidal profiles (like XL or L series), reducing tooth shear under high torque.

HTD 5M is not interchangeable with GT2 (2mm pitch), T5 (5mm trapezoidal), MXL, XL, or other profiles — even if the pitch number looks similar. Always verify both pitch and tooth profile before ordering.

HTD 5M belts at 20mm width are generally suited for moderate to high torque applications in light-to-medium industrial and maker/DIY contexts. Actual rated load depends on pulley diameter, RPM, wrap angle, and ambient temperature. As a general reference, wider belts and larger pulley diameters increase load capacity.

For precision load calculations, consult your drive system's engineering data or contact us to confirm suitability for your specific application.

Rubber timing belts are generally resistant to light moisture and humidity, making them suitable for most indoor industrial environments. They are typically not recommended for continuous water immersion or prolonged direct UV/sunlight exposure, which can degrade the rubber compound over time.

For outdoor or wash-down environments, a polyurethane (PU) timing belt may be more appropriate. Contact us to confirm the best material for your conditions.

This belt requires HTD 5M profile pulleys — specifically pulleys with a 5mm pitch and curved tooth groove geometry. The pulley must be rated for 20mm belt width or wider (flanged pulleys are recommended to keep the belt tracked).

Do not use with: GT2, T5, MXL, XL, L, or any other profile pulley. Even if the pitch number matches, mismatched tooth profiles will cause rapid wear or belt failure.

Divide the millimeter perimeter by 25.4 to get inches. Quick reference:

• 600mm ÷ 25.4 ≈ 23.6"
• 1000mm ÷ 25.4 ≈ 39.4"
• 1500mm ÷ 25.4 ≈ 59.1"
• 2000mm ÷ 25.4 ≈ 78.7"
• 3000mm ÷ 25.4 ≈ 118.1"

All variant names (e.g., "1000-5M") refer to the belt's perimeter in millimeters.

Yes — HTD 5M timing belts are commonly used in CNC routers (X/Y/Z axis drives), laser cutters, and some larger-format 3D printers where the drive system uses 5M pulleys. However, many desktop 3D printers (e.g., most Creality, Prusa, Voron designs) use GT2 2mm pitch belts, not HTD 5M.

Always verify your machine's belt profile and pitch before ordering. Check your existing belt or pulley for markings like "HTD 5M," "5M," or "5.0mm pitch."