1. What is Hydraulic Motor Torque?

Hydraulic motor torque is the rotational force produced by a hydraulic motor, determined by the motor's displacement and the system pressure. It's a crucial parameter for selecting and sizing hydraulic motors for specific applications.

2. How Does the Calculator Work?

The calculator uses the hydraulic torque equation:

Where:

• \( T \) — Torque in Newton-meters (Nm)
• \( D \) — Displacement in cubic centimeters per revolution (cm³/rev)
• \( P \) — Pressure in bar
• \( \pi \) — Mathematical constant (~3.1416)

Explanation: The equation shows that torque is directly proportional to both displacement and pressure. The 2π factor converts the units appropriately.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for selecting the right hydraulic motor for an application, ensuring it can handle the required load without stalling or being oversized.

4. Using the Calculator

Tips: Enter the motor's displacement in cm³/rev and system pressure in bar. Both values must be positive numbers for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between theoretical and actual torque?
A: Theoretical torque is calculated as shown, while actual torque accounts for mechanical efficiency (typically 85-95% of theoretical).

Q2: How does speed affect torque in hydraulic motors?
A: In theory, torque is independent of speed, but in practice, torque may decrease at very high speeds due to increased friction and flow losses.

Q3: What are typical torque values for hydraulic motors?
A: Torque varies widely based on motor size - from a few Nm for small motors to thousands of Nm for large radial piston motors.

Q4: Can I use this for hydraulic pumps?
A: The same equation applies for calculating the torque required to drive a hydraulic pump.

Q5: How do I account for efficiency losses?
A: Multiply the theoretical torque by the motor's mechanical efficiency (usually 0.85 to 0.95) for more realistic values.