1. What is Torque?

Torque is a measure of the rotational force applied to an object. In mechanical engineering, it represents the turning force produced by engines, motors, and other rotating machinery, measured in Newton-meters (N·m).

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( Torque \) — Rotational force in Newton-meters (N·m)
• \( Power \) — Mechanical power in kilowatts (kW)
• \( 9,549 \) — Conversion constant
• \( RPM \) — Rotational speed in revolutions per minute

Explanation: The constant 9,549 comes from the conversion between different units of power and rotational speed, allowing calculation of torque from kW and RPM.

3. Importance of Torque Calculation

Details: Accurate torque calculation is essential for designing mechanical systems, selecting appropriate motors and engines, determining load capacities, and ensuring proper operation of rotating machinery.

4. Using the Calculator

Tips: Enter power in kilowatts (kW) and rotational speed in RPM (revolutions per minute). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 9,549 used?
A: The constant 9,549 comes from unit conversion: 60,000 ÷ (2π) ≈ 9,549. It converts between kW, RPM, and N·m in the torque formula.

Q2: What are typical torque values for different applications?
A: Torque values vary widely - small electric motors may produce 1-10 N·m, automotive engines typically produce 200-500 N·m, while industrial machinery can produce thousands of N·m.

Q3: How does torque relate to horsepower?
A: Torque and horsepower are related through RPM. Horsepower = (Torque × RPM) ÷ 7,252. Both are important measures of engine performance.

Q4: Can this formula be used for electric motors?
A: Yes, this formula works for any rotating machinery including electric motors, internal combustion engines, turbines, and other mechanical systems.

Q5: What factors affect torque output?
A: Torque output depends on engine/motor design, fuel/energy input, gearing systems, load conditions, and operating temperature.