A/B/C/D Section V-Belt Metric — Transmission Drive Belt 500–5000mm

Measure the outer circumference (perimeter) of your existing belt, or use a flexible tape measure around your pulleys with the belt removed. The model number on this listing (e.g., A-1000) indicates the section type and nominal perimeter in millimeters — 1000mm is approximately 39.4 inches. When in doubt, size up slightly to allow for tensioner adjustment. If your drive has a fixed center distance, calculate the required belt length using the pulley diameters and center distance.

The section letter indicates the cross-sectional width and depth of the belt. A section is 13mm wide and suited for lighter drives; B section at 17mm handles moderate loads; C section at 22mm is used for heavier industrial applications; D section at 32mm is designed for high-torque, heavy-duty drives. Always match the section letter to your pulley groove profile — mixing sections will cause premature wear or belt ejection.

Load capacity varies by section size, belt length, pulley diameter, and operating speed. Generally, A section belts are suited for light-to-medium duty applications (typically up to a few horsepower per belt), while D section belts are designed for heavy industrial loads. For specific power ratings, consult your equipment manual or contact us to confirm suitability for your application.

These rubber V-belts can generally handle incidental moisture and are commonly used on outdoor equipment such as agricultural machinery and irrigation pumps. However, prolonged exposure to standing water, direct UV radiation, ozone, or harsh chemicals may reduce service life. Where possible, shield the drive with a belt guard and inspect belts periodically for cracking or glazing.

Yes. These belts follow standard metric V-belt cross-section profiles equivalent to ISO 4184 / DIN 2215. They are generally compatible with pulleys designed for A, B, C, or D section metric belts. Always verify your pulley groove angle (typically 34°–38° for metric V-belt pulleys) and groove width match the belt section before installing. If your pulleys are marked with an inch designation (e.g., 3L, 4L, 5L), contact us to confirm cross-compatibility.

Common signs of a worn V-belt include: squealing or chirping noise under load, visible slipping at the pulleys, cracks or fraying on the belt surface, glazing (shiny appearance) on the inner contact face, or the tensioner bottoming out due to belt stretch. Replacing belts before they fail completely prevents damage to pulleys and driven equipment. On multi-belt drives, replace all belts as a matched set.

In most cases, no. Multi-belt drives are engineered to share the load across several belts simultaneously. Replacing with a single belt will generally overload it and cause rapid failure. Always replace with the same number of belts as specified by your equipment manufacturer. Each unit in this listing is sold as one individual belt.