XH Closed Loop Timing Belt — 5.08mm Pitch, 50–150mm Wide, CNC & Industrial Drive

Measure the center-to-center distance between your two pulleys, then calculate the required belt pitch length using the standard formula: Belt Length = 2 × C + π × (D1 + D2) / 2, where C is the center distance and D1/D2 are the pulley pitch diameters. Divide the result by the XH pitch (5.08mm / 0.200") to get the required tooth count, then select the next available size up. For example, the 46-tooth belt has a pitch length of 1022.35mm (≈40.2"), and the 176-tooth belt measures 3911.6mm (≈154.0").

Belt width determines torque capacity — wider belts generally handle higher loads. As a general rule, match the belt width to your pulley face width; the belt should be equal to or slightly narrower than the pulley. For lighter CNC axis drives, 50–75mm is typically sufficient. For heavier industrial conveyors or high-torque applications, 100–150mm widths are generally recommended. When in doubt, consult your machine's engineering specifications or contact us.

Actual load capacity depends on belt width, operating speed, pulley diameter, and service conditions. XH-series belts are designed for moderate-to-high torque industrial applications — they carry significantly more load than lighter series such as XL or L. Wider belts within this listing carry proportionally higher torque. For precise load ratings specific to your application, refer to standard XH belt engineering tables or contact us to confirm suitability.

XH timing belts are typically constructed from neoprene rubber, which provides good resistance to oil, grease, and moderate heat in general industrial environments. They are generally not recommended for prolonged direct UV exposure or highly corrosive chemical environments without additional protection. If your application involves harsh outdoor conditions or aggressive chemicals, contact us to confirm suitability before ordering.

Yes. These belts follow the standard XH trapezoidal tooth profile with a 5.08mm (0.200") pitch and are compatible with any standard XH-profile timing pulley of the matching width. Always verify that your pulley's tooth profile, pitch, and face width match the belt you select. XH is an inch-series standard distinct from metric profiles such as T5, T10, or HTD.

XH belts are well-suited for large-format or heavy-duty CNC machines and industrial automation equipment that require the higher torque capacity of the XH profile. Smaller desktop CNC routers and laser cutters typically use lighter belt series such as GT2, T5, or MXL. If your machine's drive system is already designed around XH pulleys, these belts are a direct replacement. Contact us if you need help confirming compatibility.

A closed loop (endless) timing belt is manufactured as a continuous loop with no open ends or mechanical splice. This eliminates the weak point introduced by joining hardware, providing consistent tension distribution and smooth tooth engagement throughout the belt's service life. For precision CNC axis drives and conveyor systems, an endless belt generally delivers more reliable performance than a spliced open-end belt.

Divide millimeters by 25.4 to convert to inches. For example: 1022.35mm ÷ 25.4 ≈ 40.2"; 1778mm ÷ 25.4 = 70.0"; 3556mm ÷ 25.4 = 140.0". The XH pitch itself is 5.08mm = 0.200" exactly. Tooth count × 5.08mm = pitch length in mm; tooth count × 0.200" = pitch length in inches.