Torque Calculator
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Torque Calculator. You can use the above torque calculator to calculate the torque in a rotating object by providing force and distance values.
Force Calculation
Distance Calculation
What is Torque?
Torque is defined in physics as the twisting force that tends to cause an object to rotate. The axis of rotation is the point at which the object rotates. The Newton meter is the SI unit for torque. The axis of rotation should generally be the fixed point or the center of mass. If you apply a force at a distance from the pivot point, the torque produced by the force will cause the object to rotate, even though the force will act in a straight line. Torque is similar to work in that it is known as the force applied over a certain distance.
Torque Calculation Formula
τ = D * F * sinθ
Where:
• τ is the torque, and the unit of torque is newton-meters.
• D is the distance between the pivot point and the point of force application.
• F is the force applied.
• θ is the angle between the force vector and lever arm vector. Typically, generally it is equal to 90°.
Types of Torque
There are two types of torque: static and dynamic.
The term "static torque" refers to a torque that does not generate an angular acceleration. Since the door does not rotate about its hinges despite the force applied, anyone pulling on it applies a static torque to it. Since they are not speeding, someone pedaling a bicycle at a constant speed is also applying a static torque.
Dynamic torque is carried by the drive shaft of a race car accelerating from the start line since it must produce an angular acceleration of the wheels provided that the car is accelerating along the track.
FAQ
1. What’s the torque equation?
The torque (the tendency of an object to rotate) depends on three different factors: τ = rFsin(θ)
2. How to calculate torque?
• Start with determining the force acting on the object. Let's assume that F = 120 N.
• Decide on the lever arm length. In our example, r = 0.5 m.
• Choose the angle between the force vector and lever arm. If it is not equal to the default 90°, open the calculator's advanced mode to change it. We will assume θ = 90°. Use advance mode to change the value of θ.
• Enter these values into our torque calculator. It uses the torque equation: τ = rFsin(θ) = 0.5 * 120 * sin(90°) = 60 N·m.
• The torque calculator can also work in reverse, finding the force or lever arm if torque is given.
3. How is torque calculated in a series gearbox?
Step 1: Multiply the force acting on the first gear by the first gear's radius.
Step 2: Divide the second gear's radius by the first gear's.
Step 3: Multiply the gear ratio by the input torque that you calculated in Step 1.
4. How do you calculate the dimension of torque?
Newtons x metres / radians.
It is the “divided by angle turned” part that gets lost by the subtle mistake in SI of not using names for values of 'dimension 1′.
The problem goes all the way back to the mechanical days of Buckingham's Pi theorem and the expectation that you can separate the numeric hand calculations from the unit checking - pre computers!
5. Why is torque decreasing as RPM increases?
Torque starts to decrease because the engine cannot breathe as well. Due to the speed, the cylinder does not fill with air as well. A designer can get around this problem with "tuned intake" which sets up a resonance to pack the cylinder with air, but it only happens at a certain RPM.
6. How is torque calculated in hydraulics?
If your question meant hydro motor torque, most come with a pressure vs torque graph. But if are looking for the torque requirements of a pump. We need to find the BHP and rpm required as input to the pump. There are a lot of web calculators to find Bhp and torque interchangeably.
As a general equation Flow X pressure = BHP, so if you know the pump flow and pressure, the rest is easy.
7. What’s the difference between torque and horsepower?
Torque is a rotating force produced by an engine’s crankshaft. The more torque an engine produces, the greater its ability to perform work. The measurement is the same as work, but slightly different. Since torque is a vector (acting in a certain direction), it’s quantified by the units pound-feet and newton-meters.
Power is how rapidly work is accomplished. Eighteenth-century Scottish inventor James Watt gave us this handy equivalency: one horsepower is the power required to lift 33,000 pounds exactly one foot in one minute. Honoring that contribution, the SI measurement unit for power is the kilowatt.
8. What is breakaway torque?
Breakaway torque is defined as the torque required to start a part’s rotation from a stationary position. It is usually a higher value compared to the maximum tightening torque value as per specification. This is because this torque is required to not only overcome the inertia of the part but also the static friction due to the adjoining components.
9. How to measure breakaway torque using a torque wrench?
Measuring Breakaway torque using a torque wrench is not to be practiced ideally as it doesn't yield accurate results and most manufacturers use dynamic torque auditing methods to measure the breakaway torque consisting of transducers attached to the tightening tool itself and instantaneous data being logged in a data logger.
If at all the torque wrench has to be used for measurement the wrench has to be turned very slowly and carefully observing the point at which the fastener tightens completely with no further movement of the screw on the threaded portion.
10. What is the difference between starting torque and breakaway torque?
Starting torque is to rotate the machine from zero speed but breakaway torque is to stop the machine from its rated speed. The armature current required for breakaway torque is very high to make back and zero. Breakaway torque is always higher than starting torque.
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