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V-Belt Pulley RPM Calculator

V-Belt Pulley RPM Equation:

\[ RPM2 = RPM1 \times \frac{D1}{D2} \]

rev/min
diameter unit
diameter unit

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1. What is the V-Belt Pulley RPM Equation?

The V-Belt Pulley RPM equation calculates the rotational speed of the driven pulley based on the driver pulley's speed and their respective diameters. It's fundamental in mechanical power transmission systems using V-belts.

2. How Does the Calculator Work?

The calculator uses the V-Belt Pulley RPM equation:

\[ RPM2 = RPM1 \times \frac{D1}{D2} \]

Where:

Explanation: The equation shows that the speed ratio between pulleys is inversely proportional to their diameter ratio.

3. Importance of RPM Calculation

Details: Accurate RPM calculation is crucial for designing power transmission systems, ensuring proper equipment operation, and preventing mechanical failures due to incorrect speed ratios.

4. Using the Calculator

Tips: Enter driver pulley RPM and both pulley diameters in consistent units. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if my pulleys have different groove depths?
A: For V-belts, use the pitch diameter (approximately the diameter at the belt's neutral axis) rather than the outer diameter.

Q2: Does belt slip affect this calculation?
A: This is an ideal calculation. In practice, account for 1-2% speed loss due to belt slip.

Q3: Can I use this for timing belts?
A: Yes, but use the pitch diameter for timing pulleys and account for zero slip.

Q4: How does multiple pulleys affect the calculation?
A: For systems with multiple pulleys, calculate step by step from driver to final driven pulley.

Q5: What's the practical RPM limit for V-belts?
A: Typically 6,500 RPM for standard V-belts, but consult manufacturer specifications.

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