1. What is a Hydraulic Motor Torque Calculator?

Definition: This calculator determines the torque output of a hydraulic motor based on system pressure and motor displacement.

Purpose: It helps hydraulic system designers and technicians calculate motor performance for proper system sizing and troubleshooting.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( T \) — Torque output (lb-ft)
• \( P \) — Pressure (psi)
• \( D_m \) — Motor displacement (in³/rev)
• \( 2\pi \) — Conversion factor for rotational units

Explanation: The formula calculates torque by multiplying pressure by displacement, then dividing by 2π to convert to rotational torque units.

3. Importance of Hydraulic Motor Torque Calculation

Details: Accurate torque calculation ensures proper motor selection for the load requirements, prevents system overload, and helps diagnose performance issues.

4. Using the Calculator

Tips: Enter the system pressure in psi and motor displacement in cubic inches per revolution. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between theoretical and actual torque?
A: This calculates theoretical torque. Actual torque will be slightly less due to mechanical efficiency losses (typically 85-95% of theoretical).

Q2: How does motor speed affect torque?
A: In a properly sized system, torque remains relatively constant across the motor's operating speed range.

Q3: What if I know the torque and need to find pressure?
A: Rearrange the formula: \( P = (T \times 2\pi) / D_m \)

Q4: Can I use this for hydraulic pumps?
A: Yes, the same formula applies to calculate input torque required to drive a hydraulic pump.

Q5: What units does this calculator use?
A: US customary units (psi, in³/rev, lb-ft). For metric units, different conversion factors apply.