1. What is the Hydraulic Motor Speed Equation?

The hydraulic motor speed equation calculates the rotational speed of a hydraulic motor based on the flow rate of hydraulic fluid and the motor's displacement. This is essential for selecting the right motor for your hydraulic system.

2. How Does the Calculator Work?

The calculator uses the hydraulic motor speed equation:

Where:

• \( N \) — Motor speed in revolutions per minute (RPM)
• \( Q \) — Flow rate in gallons per minute (GPM)
• \( D \) — Motor displacement in cubic inches per revolution (in³/rev)
• 231 — Conversion factor (cubic inches per gallon)

Explanation: The equation shows that motor speed is directly proportional to flow rate and inversely proportional to displacement.

3. Importance of Motor Speed Calculation

Details: Calculating motor speed is crucial for proper system design, ensuring the motor operates within its optimal speed range and meets application requirements.

4. Using the Calculator

Tips: Enter flow rate in GPM and displacement in in³/rev. Both values must be positive numbers. The calculator will output the motor speed in RPM.

5. Frequently Asked Questions (FAQ)

Q1: Why is 231 used in the equation?
A: 231 is the number of cubic inches in a US gallon, which converts the flow rate from GPM to cubic inches per minute.

Q2: What is a typical hydraulic motor speed range?
A: Most hydraulic motors operate between 500-3000 RPM, but this varies by motor type and application.

Q3: How does displacement affect motor speed?
A: Higher displacement motors turn slower at the same flow rate, while lower displacement motors turn faster.

Q4: Can I use this for hydraulic pumps too?
A: Yes, the same equation applies to hydraulic pumps when calculating input speed requirements.

Q5: What if my motor has metric specifications?
A: You'll need to convert units first (1 GPM = 3.785 L/min, 1 in³ = 16.387 cm³).