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What do the numbers mean on drive belts?

The numbers on drive belts indicate different specifications such as length, width, and type. Here is a breakdown of what these numbers commonly represent:

1. Length:

- The first set of numbers often represents the length of the drive belt in inches or millimeters. For instance, a belt marked "420" indicates a length of 42 inches or 1067 millimeters.

2. Width:

- The second set of numbers typically represents the width of the belt in inches or millimeters. For example, a belt marked "420-12" has a width of 0.472 inches or 12 millimeters.

3. Type:

- The third set of characters, often a letter or a combination of letters and numbers, indicates the type or profile of the belt. This can vary depending on the manufacturer and application. Some common types include:

- A, B, C, D: These letters indicate different cross-sectional shapes or profiles of the belt.

- VX, AX, BX: These indicate narrow wedge belts.

- SPZ, SPB: These indicate classical wedge belts.

- HP: High-power V-belt.

- HTD: High torque drive (toothed belt).

Understanding the numbers on a drive belt is essential for selecting the correct belt for your specific application. It ensures proper fit, performance, and longevity of the belt. If you are unsure about the right belt specifications, it is recommended to consult the product manual or reach out to the manufacturer or supplier for assistance.

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