XH Timing Belts

XH timing belts are heavy-duty trapezoidal profile belts with a 7/8" (22.225mm) pitch, designed for high-torque, high-horsepower industrial drives. XH is the second-largest pitch in the ANSI/RMA trapezoidal timing belt system, positioned between H (1/2" pitch) and XXH (1-1/4" pitch). These belts are built for demanding applications including large conveyors, machine tools, printing presses, extruders, and heavy industrial power transmission equipment.

XH timing belts feature a trapezoidal tooth form and are constructed with neoprene (rubber) bodies, fiberglass tensile cords for high tensile strength and low elongation, and nylon tooth facing to reduce friction and extend wear life. The 7/8" pitch provides substantially more load capacity than H belts, making XH the preferred choice when H belts are undersized but a full step up to chain drive or gear drive is unnecessary.

XH Timing Belt Part Number Decoder

XH timing belt part numbers follow the standard ANSI trapezoidal format. The number before the profile code indicates the belt's pitch circumference in tenths of an inch, and the number after indicates the belt width in hundredths of an inch.

Standard Format: [Pitch Length]XH[Width Code]

For XH belts, the pitch length portion of the part number represents tenths of an inch. To find the actual belt pitch circumference, read the digits before "XH" with a decimal point before the last digit. For example, 504 = 50.4 inches. The width code after "XH" represents hundredths of an inch: 200 = 2.00", 300 = 3.00", 400 = 4.00". Texas Belting can cross-reference XH belt part numbers from Gates, Continental, Bando, and other brands. Call 888-203-2358 or send us your part number for fast identification.

XH Timing Belt Width Guide

XH timing belts are available in several standard widths. Because XH belts handle heavy loads, they tend to be wider than smaller-pitch belts. Selecting the correct width is critical for matching the drive's torque requirements and the pulley (sprocket) width.

If your application requires a width not listed here, contact Texas Belting. Custom or non-standard widths may be available depending on the manufacturer and lead time.

XH vs. Other Heavy-Duty Timing Belt Pitches

XH is the second-largest ANSI trapezoidal pitch. The table below compares XH to neighboring pitches and competing profiles to help you determine if XH is the right choice for your drive.

XH belts provide more load capacity than H (1/2" pitch) belts but are heavier and require larger pulleys. For new designs, many engineers evaluate 14M HTD or Poly Chain GT Carbon belts as alternatives that offer comparable torque capacity with improved tooth engagement and potentially narrower belt widths. For replacement on existing equipment, always match the original XH profile and pitch. See the Timing Belt Tooth Profiles Explained guide for a full comparison of all profiles.

XH Timing Belt Materials

XH timing belts are primarily manufactured in neoprene (rubber) construction. Due to the heavy-duty nature of XH applications, material options are more limited than smaller-pitch profiles.

Neoprene (Rubber) XH Belts

Standard XH belts are constructed with a neoprene body, fiberglass tensile cords, and nylon tooth facing. This construction provides excellent resistance to oil, heat, and ozone while delivering the tensile strength required for high-torque applications. Neoprene XH belts are the industry standard for replacement and new installations in general industrial environments.

HNBR and Specialty Compounds

For extreme temperature, chemical exposure, or extended-life requirements, some manufacturers offer XH belts in HNBR (Hydrogenated Nitrile Butadiene Rubber) or other specialty elastomers. These provide improved heat resistance (up to 250°F / 121°C) and better chemical compatibility. Contact Texas Belting for availability of specialty XH belt compounds.

Urethane XH belts are not commonly manufactured in closed-loop form at this pitch size. For applications that require urethane construction, consider urethane timing belts in metric AT or HTD profiles as an alternative.

Common XH Timing Belt Applications

XH belts are specified where high torque and positive synchronous drive are required at moderate to low speeds. The large tooth pitch transmits substantial power without slippage.

XH belts are not suited for high-speed, low-torque applications. For lighter loads, consider H (1/2" pitch), L (3/8" pitch), or HTD timing belts.

XH Timing Belt Brands We Carry

Texas Belting stocks and sources XH timing belts from the following manufacturers. We can cross-reference part numbers between brands to find the correct replacement belt.

Not sure which brand to specify? Texas Belting's team can help you match the right XH belt to your application. Request a quote or call 888-203-2358.

XH Timing Belt FAQs