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The Basic Categories of V Belt


V Belt solved the slippage and alignment problem. It is […]

V Belt solved the slippage and alignment problem. It is now the basic belt for power transmission. They provide the best combination of traction, speed of movement, load of the bearings, and long service life. They are generally endless, and their general cross-section shape is Roughly trapezoidal. The "V" shape of the belt tracks in a mating groove in the pulley, with the result that the belt cannot slip off. The belt also tends to wedge into the groove as the load increases—the greater the load, the greater the wedging

Before you buy a V-belt, you’d better know the different categories of belt, which can help you choose the most suitable belt.

2L, 3L, 4L, and 5L prefix – The “L” stands for light duty, and is designed for use with fractional horsepower motors. Meaning less than 1 HP. “L” style belts are often designated as light duty industrial, or lawn & garden.

A, B, C, D, E, And AX, BX, CX, and DX size belts are more industrial. They’re sometimes referred to as “Conventional” belts. The “X” is a standard specification for inside perforations also known as notched or cogged belts. Although “Conventional” belts can be substituted for “L” style belts which appear to be the same, “L” style belts should never be used as replacements for “Conventional” belts.

3V, 5V, 8V, AVX, BVX, CVX, DVX– IMPORTANT: Don’t Confuse “V” In The Part Number Prefix! I run this warning because common sense would lead you to believe a 3V belt is a comparable substitute for a 3L, or that an AVX belt is a suitable substitute for an AX belt. Common sense would be wrong. The “V” designation in the prefix is a difference in the profile of the belt. Never substitute or mix these belts. They do not fit properly into pulleys designed for 3L and AX belts. They do not make full contact against the bottom and walls, and therefore will fail to perform.