HTD-14M Closed Loop Timing Belt — 14mm Pitch, 30mm & 40mm Width, 56–309 Teeth

Measure the center-to-center distance between your two pulleys, then calculate the required belt pitch length using the standard formula: L = 2C + π(D1+D2)/2 + (D2−D1)²/4C. Divide the pitch length by 14mm to get the tooth count. For example, a 784mm belt has 56 teeth (784 ÷ 14 = 56). If you fall between two sizes, generally size up to avoid over-tensioning your drive.

HTD-14M belts are designed for medium-to-heavy power transmission. The 14mm pitch profile generally supports higher torque loads than smaller pitches like 5M or 8M. Actual load capacity depends on belt width, pulley diameter, and operating speed — the 40mm-wide variants typically carry proportionally more torque than the 30mm versions. Contact us to confirm suitability for your specific application.

HTD timing belts are generally made from neoprene rubber with fiberglass or steel cord reinforcement, which provides good resistance to moisture, oils, and moderate temperature ranges (typically −20°C to +80°C). For continuous outdoor exposure or submerged use, we recommend confirming the specific material composition with us before ordering.

These belts follow the HTD (High Torque Drive) profile standard with a 14mm pitch. They are compatible with HTD-14M pulleys/sprockets only. They are not interchangeable with trapezoidal profiles (MXL, XL, L, H) or other curvilinear profiles such as GT2 or GT3. Always match the belt profile and pitch to your pulley specification.

Choose the width that matches your existing pulley face width. The 30mm (≈1.18") width is suitable for lighter-duty or space-constrained setups, while the 40mm (≈1.57") width provides greater load capacity and is generally preferred for heavier CNC or industrial drive applications. Your pulley's usable belt width determines the maximum belt width you can run.

These are closed-loop (endless) timing belts. They are pre-formed into a continuous loop and cannot be cut or spliced in the field. You must select the correct tooth count and pitch length to fit your drive system without modification. If you need a custom length not listed, contact us.

HTD-14M closed loop timing belts are commonly used in CNC routers, laser cutters, large-format 3D printers, conveyor and indexing table systems, servo-driven linear actuators, and other precision power transmission setups where slip-free synchronous motion is required.

To install a closed-loop belt, you typically need to reduce the center-to-center distance between your pulleys (or use a tensioner) to slip the belt over both pulleys, then re-tension to the manufacturer's recommended deflection spec. In most cases, a belt deflection of approximately 1/64" per inch of span is a reasonable starting point, but always refer to your machine's documentation for the correct tension specification.