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Torque Formula:
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The torque formula T = (P × 9550) / N calculates torque from power and rotational speed (RPM). This equation is widely used in mechanical engineering to determine the rotational force produced by motors and engines.
The calculator uses the torque formula:
Where:
Explanation: The constant 9550 comes from the conversion between different units of power and rotational speed to obtain torque in Newton-meters.
Details: Torque calculation is essential for designing mechanical systems, selecting appropriate motors, determining load capacities, and ensuring proper operation of rotating machinery in various engineering applications.
Tips: Enter power in kilowatts (kW) and rotational speed in RPM. Both values must be positive numbers greater than zero for accurate calculation.
Q1: Why is the constant 9550 used in the formula?
A: The constant 9550 is derived from unit conversions (1 kW = 1000 W, 1 minute = 60 seconds, and 2π radians per revolution) to convert power in kW and speed in RPM to torque in Nm.
Q2: Can I use horsepower instead of kilowatts?
A: Yes, but you'll need to convert horsepower to kilowatts first (1 hp = 0.7457 kW) or use a different constant in the formula for horsepower input.
Q3: What are typical torque values for different applications?
A: Torque values vary widely depending on the application - from small electric motors (1-10 Nm) to large industrial engines (1000+ Nm). The specific requirements depend on the mechanical load and application.
Q4: How does torque relate to power in mechanical systems?
A: Torque and rotational speed together determine power output. Power (kW) = Torque (Nm) × RPM / 9550. Higher torque at the same RPM means more power, or the same power can be achieved with higher torque at lower RPM.
Q5: Are there limitations to this formula?
A: This formula provides theoretical torque values. Actual torque may vary due to efficiency losses, mechanical constraints, and other real-world factors in mechanical systems.