H Timing Belt 25mm Wide | 12.7mm Pitch Closed Loop Drive Belt for CNC & Industrial

The model number tells you the length directly: the number before the "H" is the pitch length in tenths of an inch. For example, 300H = 30.0 inches (762mm) loop circumference. Match this to your center-to-center distance plus the circumference of both pulleys. When in doubt, size up — a slightly longer belt is easier to tension than one that's too short. The variant option "Number of Teeth & Loop Circumference (LP)" shows the exact loop size for each model.

A 25mm wide H-series belt generally handles higher torque loads than narrower XL or L belts. Exact capacity depends on pulley tooth count, operating speed, and wrap angle, but this width is typically suited for light-to-medium industrial drives, CNC axis motion, and conveyor systems. Consult your drive system's engineering specs for precise load ratings — contact us if you need guidance.

H timing belts are generally constructed from neoprene rubber with fiberglass or steel cord reinforcement, which offers moderate resistance to moisture and mild chemicals. For prolonged outdoor exposure or washdown environments, verify the specific belt construction with us before ordering. These belts are not typically rated for full submersion or highly corrosive chemical environments.

H-series belts use the classic inch-series timing belt standard with a 12.7mm (1/2 inch) pitch and trapezoidal tooth profile. They are compatible with standard H-series timing pulleys. They are not interchangeable with GT2, HTD, XL (9.525mm pitch), or L (9.525mm pitch) pulleys. Confirm your pulley is rated for 25mm belt width and H pitch before ordering.

Select your model in the "Models" dropdown, then check the "Number of Teeth & Loop Circumference (LP)" option — it shows both values directly. For example, "60T & 762 mm" means 60 teeth and a 762mm (30.0") loop circumference. The model number encodes the pitch length: 300H = 300 × 0.1" = 30.0 inches.

Yes. H-series timing belts are commonly used in CNC routers, laser cutters, and larger-format 3D printers where GT2 belts are too narrow for the required torque. The 25mm width provides additional lateral stability and load capacity compared to narrower belt options, making it a solid choice for medium-duty CNC drive belt applications.

H belts use a classic trapezoidal tooth profile with 12.7mm pitch, while GT2 and HTD belts use a curvilinear (rounded) tooth profile. Trapezoidal belts are generally better suited for high-torque, lower-speed industrial applications. GT2 and HTD belts typically offer lower backlash and are preferred for precision motion control at higher speeds. They use different pulleys and are not interchangeable.