1. What is the Hydraulic Motor Torque Formula?

The hydraulic motor torque formula calculates the torque output of a hydraulic motor based on its displacement and the system pressure. This is essential for designing hydraulic systems and selecting appropriate motors for applications.

2. How Does the Calculator Work?

The calculator uses the hydraulic motor torque equation:

Where:

• \( T \) — Torque output (Nm)
• \( D \) — Motor displacement (cm³/rev)
• \( P \) — Pressure difference across motor (bar)
• \( \pi \) — Mathematical constant (~3.14159)

Explanation: The equation shows that torque is directly proportional to both displacement and pressure, with the constant 2π converting the units appropriately.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for selecting hydraulic motors that can provide sufficient rotational force for applications like winches, conveyors, or any rotary motion systems.

4. Using the Calculator

Tips: Enter motor displacement in cm³/rev and system pressure in bar. Both values must be positive numbers. The result will be torque in Newton-meters (Nm).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between theoretical and actual torque?
A: This formula gives theoretical torque. Actual torque will be slightly less due to mechanical efficiency losses in the motor.

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 if my pressure is in psi instead of bar?
A: You'll need to convert psi to bar (1 bar ≈ 14.5038 psi) before using this calculator.

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

Q5: What are typical torque values for hydraulic motors?
A: Torque varies widely based on motor size. Small motors might produce 10-50 Nm, while large industrial motors can produce thousands of Nm.