1. What is the Torque Formula?

The torque formula calculates the rotational force produced by a motor based on its horsepower and rotational speed. It provides a fundamental relationship between power, speed, and torque in mechanical systems.

2. How Does the Calculator Work?

The calculator uses the torque formula:

Where:

• \( T \) — Torque (lb-ft)
• \( HP \) — Horsepower (hp)
• \( RPM \) — Rotational speed (rev/min)
• \( 5252 \) — Conversion constant

Explanation: The constant 5252 comes from the relationship between horsepower, torque, and RPM, where 1 horsepower is defined as 550 foot-pounds per second and there are 5252 radians per minute in one revolution per minute.

3. Importance of Torque Calculation

Details: Accurate torque calculation is crucial for motor selection, mechanical design, power transmission systems, and ensuring proper operation of rotating machinery.

4. Using the Calculator

Tips: Enter horsepower in hp and rotational speed in RPM. All values must be valid (HP > 0, RPM > 0). The calculator will compute the torque in pound-feet (lb-ft).

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used in the formula?
A: The constant 5252 comes from the conversion between horsepower (550 ft-lb/sec) and RPM, accounting for the fact that there are 2π radians per revolution and 60 seconds per minute.

Q2: What are typical torque values for electric motors?
A: Torque values vary widely depending on motor size and type. Small motors may produce 1-10 lb-ft, while large industrial motors can produce thousands of lb-ft.

Q3: How does torque relate to motor performance?
A: Torque determines a motor's ability to overcome resistance and accelerate loads. Higher torque means better starting capability and load handling.

Q4: Can this formula be used for all types of motors?
A: This formula applies to all rotating machinery where horsepower and RPM are known, including electric motors, internal combustion engines, and hydraulic motors.

Q5: What is the difference between torque and horsepower?
A: Torque is the rotational force, while horsepower is the rate at which work is done. Horsepower = (Torque × RPM) / 5252.