Frequently Asked Questions (FAQs)
1. What is the toughest V-belt?
Kevlar / Aramid belts are known to be the toughest V-belts. They are designed to be stronger than standard v-belts and are particularly suitable for machinery with a back side idler where normal belts wear out faster.
2. What are the three types of V-belts?
There are three types of V-belts:
1. Light Duty V-belts - suitable for light-duty applications with fractional horsepower motors.
2. Classical Heavy Duty V-belts - available in a wide range of sizes.
3. Molded Cogged V-belts - feature cogs for use with smaller diameter pulleys, provide heat dissipation, and prevent slippage with raw edge sidewalls.
3. How much HP can V-belt handle?
The most commonly used V-belts (A, B, C, and D classical belts) can handle fractional to 500-hp drives. These belts are cost-effective and widely used, but they take up more space and have more weight compared to narrow-belt drives.
4. Which is better rubber or Kevlar V-belt?
Rubber V-belts are generally better for general applications on heavy industrial machinery and drilling equipment. Kevlar V-belts, on the other hand, are great for high-powered devices that are exposed to harsh conditions.
5. Are notched V-belts better?
Notched V-belts have grooves or notches that reduce the bending resistance of the belt. They can use the same pulleys as standard V-belts and offer advantages such as running cooler, lasting longer, and being about 2% more efficient.
6. What are the two types of V belts?
There are three common types of V-belts: Classical V-belts (A to E dimensions), Narrow V series (3V, 5V, and 8V sizes), and light-duty Fractional Horsepower belts (2L, 3L, 4L, 5L dimensions). Cogged belts with an X classification are also available.
7. What is the maximum rpm for a belt drive?
The maximum surface speed for a belt drive depends on the type of belt. For larger pitch belts, it should not exceed 5500 feet per minute (28 m/s), while for minipitch belts, it should not exceed 10000 feet per minute (50 m/s). HTD belts permit a speed of 6500 feet per minute (33 m/s), and GT2 belts have a maximum speed of 7500 feet per minute (38 m/s).
8. What is the disadvantage of V-belt drive?
Some disadvantages of V-belt drives include their unsuitability for long distances due to greater weight per unit of length. They are also not applicable to synchronous machines due to creep and have limitations in speed, with centrifugal tension preventing their use below 5 m/s and above 50 m/s.