Measure the center-to-center distance between your drive and driven pulleys, then calculate: Belt Length ≈ 2 × C + π × (D1 + D2) / 2. For open-end belts used on linear axes, simply measure the required span and add 20–40mm for clamping. For example, 500mm (≈19.7") is a common choice for mid-size CNC gantries. When in doubt, order slightly longer — open-end belts can be trimmed to fit.

HTD 8M belts are generally rated for moderate-to-high torque transmission. The 30mm width typically supports a higher tangential load than narrower variants of the same pitch. Exact working tension depends on pulley diameter, operating speed, and installation preload. Consult your drive system's engineering specs to confirm suitability for your application.

The neoprene (CR) rubber compound used in most HTD timing belts offers good resistance to oil, moderate heat, and humidity. For fully outdoor or submerged applications, additional protection is generally recommended. If your environment involves continuous water exposure or chemical exposure, contact us to confirm material suitability before ordering.

This belt uses the HTD (High Torque Drive) 8M tooth profile with an 8mm pitch. It is compatible with HTD 8M pulleys of any tooth count, provided the pulley face width accommodates 30mm belt width. It is NOT interchangeable with GT2, T5, T10, or other pitch profiles — tooth geometry differs and mixing profiles will cause skipping or damage.

For CNC routers and linear motion systems, measure the full travel distance of your axis and add extra length for the belt clamp blocks on each end (typically 30–60mm total). If you are replacing an existing belt, measure the old belt's usable length before cutting. This product offers lengths in fine increments — many just 8mm apart — so you can match your requirement closely without over-ordering.

This is an open-end (linear) timing belt, not a closed loop. It is sold by the piece at a specific cut length. It is designed for linear motion applications such as CNC axis drives and conveyor systems — not for wrap-around pulley-to-pulley loop drives. If you need a closed-loop belt, please contact us or browse our other listings.

HTD 8M belts typically have a tooth height of approximately 3.4mm and an overall belt thickness (including tooth) of around 5.5–6mm. Exact dimensions may vary slightly by production batch. If your application has tight clearance requirements — such as a recessed belt channel — contact us to confirm before ordering.