Understanding Torque & RPM: What You Need to Know

  • Thread starter Sai Kiran Aka
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In summary, torque is the rotational force that is necessary for tasks such as tightening bolts or accelerating a car. The relationship between torque and RPM depends on the motor and can be transformed through a gearbox. However, there are limits to achieving high RPM with low torque due to friction.
  • #1
Sai Kiran Aka
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What is the use of torque of a motor? Is it not the RPM that is needed? And up to what percentage the torque could be reduced to increase the RPM?
 
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  • #2
Welcome to PF!
Sai Kiran Aka said:
What is the use of torque of a motor? Is it not the RPM that is needed?
Torque is what applies rotational force to things. Like tightening a large bolt or rapidly accelerating a car requires a lot of torque.
And up to what percentage the torque could be reduced to increase the RPM?
The relationship depends on the motor.
 
  • #3
Torque multiplied by RPM is Power.
A gearbox can transform power between torque and RPM.
There are limits to high RPM with low torque due to friction.
 

Related to Understanding Torque & RPM: What You Need to Know

1. What is torque?

Torque is a rotational force that causes an object to rotate around an axis. It is typically measured in units of force multiplied by distance, such as newton-meters (Nm) or foot-pounds (ft-lb).

2. How is torque related to RPM?

Torque and RPM (revolutions per minute) are inversely related. This means that as torque increases, RPM decreases and vice versa. This relationship is described by the power equation: power = torque x RPM.

3. What factors affect torque and RPM?

The amount of torque and RPM generated by an engine or motor depends on several factors, including the size and design of the engine, the type of fuel or energy source, and the load or resistance placed on the engine.

4. How do torque and RPM affect an engine's performance?

Torque and RPM play a significant role in an engine's performance. A higher torque allows an engine to produce more power, while a higher RPM allows an engine to produce power more quickly. The ideal combination of torque and RPM depends on the specific application and the desired performance.

5. How can torque and RPM be measured?

Torque and RPM can be measured using specialized instruments such as dynamometers and tachometers. These instruments measure the force and speed of rotation, respectively, and can provide accurate readings of an engine's torque and RPM output.

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