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 critical parameter for selecting the right motor for an application.

2. How Does the Calculator Work?

The calculator uses the hydraulic motor 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 pi (~3.1416)

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

3. Importance of Torque Calculation

Details: Proper torque calculation ensures the hydraulic motor can handle the load requirements without being oversized (which increases cost) or undersized (which can lead to failure).

4. Using the Calculator

Tips: Enter the motor displacement in cm³/rev and system pressure in bar. Both values must be positive numbers. The calculator will compute the theoretical torque output.

5. Frequently Asked Questions (FAQ)

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

Q2: How does motor speed affect torque?
A: In an ideal hydraulic motor, torque is independent of speed and depends only on pressure and displacement.

Q3: What's a typical displacement range for hydraulic motors?
A: Displacement can range from under 5 cm³/rev for small motors to over 1000 cm³/rev for large industrial motors.

Q4: How do I account for efficiency losses?
A: Multiply the calculated torque by the motor's mechanical efficiency (usually provided by the manufacturer).

Q5: Can I use this for hydraulic pumps too?
A: The same formula applies for calculating the torque required to drive a hydraulic pump.