A-Section V-Belt Industrial Drive Belt — 13mm x 8mm | A18 to A100 (Imperial)

The number after the "A" in the belt designation indicates the outside circumference in inches. For example, an A-36 belt is generally 36 inches (≈889mm) in outside circumference. To find the right size, measure the center-to-center distance between your pulleys and use a standard belt length calculator, or check your equipment's manual for the OEM belt number. When in doubt, measure your existing belt's outside circumference with a flexible tape measure.

These are A-section V-belts with a top width of approximately 13mm (≈1/2") and a height of approximately 8mm (≈5/16"). This is the most common industrial V-belt profile and fits standard A-section sheaves and pulleys. In some catalogs, A-section belts are also listed as 4L-section for fractional horsepower applications — these are generally interchangeable in most consumer and light industrial equipment.

A-section V-belts are generally rated for light to medium-duty power transmission. Typical power capacity depends on belt speed, pulley diameter, and arc of contact. In most cases, a single A-section belt handles up to several horsepower at standard operating speeds. For heavy-duty or high-torque applications, multiple belts running in parallel or a wider section (B, C, or D) may be more appropriate. Consult your equipment's power requirements before selecting.

A-section V-belts are typically made from rubber compounds that offer moderate resistance to moisture and temperature variation. They are generally suitable for covered outdoor equipment such as lawn mowers, compressors, and fans. Prolonged exposure to direct UV sunlight, petroleum-based oils, or harsh chemicals may reduce belt life. For applications involving chemical exposure or extreme temperatures, contact us to confirm suitability before ordering.

Yes. These belts follow the standard A-section profile and are designed to fit standard A-groove sheaves and pulleys used across most industrial and consumer equipment brands. The trapezoidal cross-section is consistent with industry-standard tooling. Always verify the groove profile of your pulley before ordering — using a belt in a mismatched groove profile can cause premature wear or slippage.

Common signs that a V-belt needs replacement include: visible cracking, fraying, or chunking on the belt surface; squealing or slipping under load; glazing (a shiny, hardened appearance on the belt sides); and noticeable loss of power or efficiency. In most regular-use applications, belts should be inspected every 6–12 months. Replacing a belt at the first signs of wear prevents damage to pulleys and driven equipment.

In many cases, yes. A-section V-belts are widely used as OEM replacements for lawn mowers, air compressors, drill presses, band saws, and other equipment. Match the belt designation (e.g., A-36) to your equipment's spec sheet, or measure the existing belt's outside circumference and cross-section to confirm compatibility. Many equipment manufacturers list the replacement belt number in the owner's manual or on a label near the belt housing.