1. What is Torque Calculation?

The torque calculation determines the rotational force transmitted by a motor shaft. It's essential for designing mechanical systems and ensuring proper motor selection for various applications.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( Power \) — Mechanical power in kilowatts (kW)
• \( RPM \) — Rotational speed in revolutions per minute
• \( 9550 \) — Conversion factor (derived from unit conversions)

Explanation: The formula relates power, speed, and torque in rotating mechanical systems. The constant 9550 comes from converting units (kW to W and minutes to seconds).

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for motor selection, shaft design, coupling selection, and ensuring mechanical systems operate within safe parameters.

4. Using the Calculator

Tips: Enter power in kW and rotational speed in RPM. Both values must be positive numbers. The calculator will compute the torque in Newton-meters (Nm).

5. Frequently Asked Questions (FAQ)

Q1: Why is 9550 used in the formula?
A: It's a conversion factor that comes from 60,000/(2π) to convert kW to W, minutes to seconds, and account for radians.

Q2: What are typical torque values for motors?
A: Torque varies greatly by motor size and application, from fractional Nm for small motors to thousands of Nm for large industrial motors.

Q3: How does torque relate to power?
A: Power is the product of torque and angular velocity. For the same power, higher RPM means lower torque and vice versa.

Q4: What if I have horsepower instead of kW?
A: First convert horsepower to kW (1 HP = 0.7457 kW) before using this calculator.

Q5: Does this work for all rotating systems?
A: This formula applies to any rotating mechanical system where power and speed are known, not just motor shafts.