HTD 3M Timing Belt 6mm Wide, Closed Loop Synchronous Belt, L=402–597mm, Black Rubber

Measure the center-to-center distance between your two pulleys, then calculate the belt length using the standard formula: L = 2C + π(D1+D2)/2 + (D1−D2)²/(4C). Alternatively, wrap a flexible tape or string around both pulleys and measure the total loop length. Select the closest available size from our 402–597mm range. For reference, 402mm ≈ 15.8" and 597mm ≈ 23.5". When in doubt, size up — a slightly longer belt can typically be tensioned; a belt that's too short cannot be installed.

HTD 3M belts are generally suited for light-to-medium duty applications. The 6mm wide version typically handles lower torque loads than wider variants (e.g., 9mm or 15mm). Actual capacity depends on pulley tooth count, operating RPM, and system tension. For high-torque or heavy industrial use, consider a wider belt or a larger pitch such as HTD 5M or 8M.

These belts are made from black rubber with internal cord reinforcement, which generally provides moderate resistance to moisture and mild chemicals. However, they are not rated for prolonged outdoor UV exposure or full submersion. For outdoor or harsh-environment applications, verify compatibility with your specific conditions before installation, or contact us to confirm suitability.

HTD 3M belts use the HTD (High Torque Drive) tooth profile with a 3mm pitch. They are compatible with HTD 3M pulleys only — not interchangeable with MXL, XL, T2.5, GT2, or other profiles. Always confirm your pulley is labeled HTD 3M before ordering. Using a mismatched pulley profile will cause premature wear or tooth jump.

Select 1 piece for a single-axis replacement or prototype build. Choose 2 pieces if you're building a CoreXY or H-bot 3D printer (which uses two belts of the same length). Order 3–4 pieces to stock spares or outfit a small production batch. Buying multiple pieces at once reduces the per-unit cost compared to separate orders.

This belt uses the HTD (High Torque Drive) profile with a 3mm pitch (distance between tooth centers). The HTD tooth is rounded and deeper than trapezoidal profiles (such as XL or T-series), which generally improves load distribution and reduces tooth jump under moderate loads. The "3M" designation refers to the 3mm pitch; do not confuse it with GT2 or GT3 profiles, which have a similar pitch but a different tooth shape.

Yes. HTD 3M belts are commonly used in desktop 3D printers, laser engravers, and small CNC routers where precise, repeatable motion is required. The 6mm width is a standard size for many motion systems. Always verify your machine's belt specification (pitch, width, and length) before purchasing to ensure a correct fit.