1. What is Mechanical Power?

Mechanical power in rotating systems is the rate at which work is done or energy is transferred. For motors, it represents the actual usable power output at the shaft.

2. How Does the Calculator Work?

The calculator uses the mechanical power formula:

Where:

• \( P \) — Mechanical power in watts (W)
• \( T \) — Torque in newton-meters (Nm)
• \( RPM \) — Rotational speed in revolutions per minute
• \( 2\pi \) — Conversion from radians to revolutions
• \( /60 \) — Conversion from minutes to seconds

Explanation: The formula converts rotational motion parameters (torque and speed) into linear power units.

3. Importance of Mechanical Power Calculation

Details: Calculating mechanical power is essential for motor selection, system design, efficiency analysis, and performance evaluation in mechanical and electrical systems.

4. Using the Calculator

Tips: Enter torque in Nm and rotational speed in RPM. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between mechanical and electrical power?
A: Mechanical power is the actual output at the shaft, while electrical power is the input to the motor. The difference represents losses.

Q2: How do I convert watts to horsepower?
A: 1 horsepower ≈ 745.7 watts. Divide the watt value by 745.7 to get horsepower.

Q3: What if my torque is in lb-ft instead of Nm?
A: First convert lb-ft to Nm (1 lb-ft ≈ 1.35582 Nm) before using this calculator.

Q4: Does this formula work for both AC and DC motors?
A: Yes, this is a general mechanical power formula that applies to all rotating machinery.

Q5: What's the significance of the 60 in the denominator?
A: It converts RPM (revolutions per minute) to RPS (revolutions per second) since power is measured in watts (joules per second).