# Questions tagged [torque]

Torque is defined mathematically as the rate of change of angular momentum of an object (in physics it is called "net torque"). The definition of torque states that one or both of the angular velocity or the moment of inertia of an object are changing. Moment is the term used for the tendency of one force to rotate an object,but not necessarily to change the angular momentum of the object (the concept which is called torque in physics).

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### Calculating torque in planetary gearbox

It's my understanding that in a planetary gearbox, force moves through the system via four mechanisms: the ring gear, the planet gears, the planetary carrier, and the sun gear. I'm trying to ...
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### What's the minimum torque needed for 2 DC motors for moving a 1 kg object on top of them?

I have a weight of 1 kg and I want to properly choose 2 DC motors for them in order to be able to move the 1 kg of weight with variable speeds in the range of 0 to 1 m/s with an increment of 0.05 m/s. ...
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### Question about engine reaction torque from gas forces

in the figure below the reaction torque equation is given by Fg41.x trying to rock the ground plane about the O2 pivot due to gas forces . My question is if the piston with the cylinder whole assembly ...
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### Torque calculation for DIY friction wheel drive electric unicycle

I’m building a friction wheel drive electric Unicycle. Something like this; My question is how much torque should the friction wheel drive motor have considering the total mass of unicycle including ...
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### What are the physics behind a TV wall mount?

As I was installing this wall mount, I began to wonder how exactly physics is at work with it. In other words, how does the design of the mount play a role in ensuring that the mount itself supports ...
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### Do smaller cutters of shredders exert more force than large cutters?

I am designing a shredder and would like to know the right size (diameter) of a cutter . I believe this is how a shredder works from my online research. Torque = Force x Distance (radius of cutter) ...
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### Torque on motor shaft when shaft is rotated manually

The motor shaft is connected to a flywheel which is rotated manually to achieve a certain speed. Now when motor is switched on, how will it impact the shaft? Will motor whole power goes into ...
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1 vote
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### How to replace these two forces with one force?

Here, $P>Q$. $O$ is the center of mass of the rigid and uniform bar/stick. As $P>Q$, the resultant is situated to the right of $\vec{P}$ and is parallel to $\vec{P}$. The magnitude of the ...
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### How can wheels with spokes concurrent at the center be solid?

A traditional bicycle wheel looks like the left wheel in the image. The spokes are not concurrent at the center. They connect with the hub at a near tangent. Given their length-to-diameter ratio, it ...
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### Finding the right stepper motor holding torque for and X and Y gantry pick and place moving back and forth

X axis Force = mgu M = mass of plate g = gravity u = coefficient of friction (7kg)(9.81m/s)(0.5) = 34N Torque = fxd F = force d = radius of pulley T = (34N)(4mm) = 136 mNm (**Stepper Motor, NEMA 17, ...
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### Will the torque applied to a circular object be the same if the object isn't aligned in the center of the Torque?

I'm a student designing a system to automatically turn a steering wheel. In this design the motor will be in the center of the steering wheel and it will apply it's torque on the steering wheel ...
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### Help on how to calculate motor drive torque for belt and pulley. To get a stepper motor

I need help to find 2 stepper motor for the x and y axis on gantry. The pulleys is 8mm. Force formula F=mgu m=mass g=gravity u=coefficient of friction (7kg)(9.81m/s2)(0.5) = 34 N Torque formula T=Fd t=...
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### Calculating the maximum lifting force of an average car

I'm interested to know how much kilograms force an average car can produce. I made the following calculations to answer my question but I'm not sure if I'm right or wrong! Imagine we have a 1.8L ...
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### Question about torque in car engines

Sometimes people say "The engine of Car A has a higher torque than Car B with both having the same horsepower" My question is : if both cars are equal in horsepower can't we just avail this ...
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### How to select the right power supply for a stepper motor?

When choosing a power supply for a stepper motor, e.g. this one below: Amazon Link NEMA 23 This one has: Rated Current: 4.0A Operating Voltage: 24-50VDC The Stepper Driver I will be using is: Stepper ...
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### Could I have help on understanding stepper motor speed?

I'm confused about stepper motor speed. On their data sheet it doesn't really specify a maximum speed. I want to use a stepper motor with a 3:1 gear ratio. This is the motor that I am looking at: ...
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### How would I calculate the torque of the motor shown in the diagram?

Torque due to force of gravity: -Payload: 0.2kg x 0.3m x 9.81 = 0.5886 -Hand: 0.1kg x 0.25m x 9.81 = 0.24525 -Forearm: 0.3kg x 0.1m x 9.81 = 0.2943 Torque due to force of gravity = 1.13Nm What about ...
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### How does a lead screw affect the torque of a motor? Can a leadscrew be used as way of increasing torque?

I'm planning on using a lead screw for my robotic arm project. My question was that if I for example use a 3Nm torque motor and couple it to a lead screw (four-start lead screw), does the torque ...
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### Flywheel design equation (angular speed)

What value of average angular speed (ω avg) should we take while designing the flywheel out of the varying speeds of engine depending on its acceleration. And should we just assume Cf(co-eff. of speed ...
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### Can you calculate torque without any pulleys involved, and if so, how?

I'm trying to calculate the type of motor I need to turn something of a certain weight, so I feel the thing I'm trying to calculate is torque, but, when I research how to find torque, I find this &...
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### How to combine the power of two rods spinning at a different speed into one rod spinning at a combined speed? [duplicate]

I have two rods (that will be powered via something like two water wheels), and I need to combine their power so they both rotate the same rod. Sadly, they may spin at different speeds, and the ...
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### Torque for servos of tiltrotors

I am sourcing a servo for a tiltrotor drone and need to calculate the required torque to rotate the propeller and the motor from facing the front to facing the top. I understand that the minimum ...
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### Why is the reaction torque created when a shaft is attached to the generator by bearings only?

Observe the picture below, taken from this link. Now compare the figure above with the same shaft (being rotated by the turbine) with a torsional moment, but now the other end is fixed to the wall (...
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### Understand how to choose the pivot point to calculate the moment of forces in dynamics

In statics, the net force and the net torque must be both zero. The net torque is the vector sum of all the involved torques (first moment of each force) about any arbitrary point $P$. The point $P$ ...
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### How to maximize strength/torque of a joint?

I'm an elec engineering student and so mechanics isn't my best field, apologies if the question is straightforward. If i have a robotic joint (e.g elbow or knee). What are the best methods for ...
1 vote
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### Damage to drill through torque?

I've got a Bosch PSB 50 drill, which I'm using to drill through some apparently really tough wood. I don't know why, The drill seems to be struggling, and at times comes to a complete stop. I'm not ...
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1 vote
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### Calculating Motor Torque needed for a belt driven linear motion mechanism?

I am working on a belt-driven linear motion mechanism using drawer slides (I've attached a small video that shows the Mechanism for my First Tech Challenge Team. I was now wondering how much torque ...
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I've been working on converting a 500Kg pneumatic press to use it for injection molding. In order to do that though I'd like to raise the cylinder up maybe 12". So I fabricated 4 5/8 CR rods and ...
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### Torque required to push object hanging from ceiling

I'm trying to determine a suitable motor in order to reciprocate a small wooden table that is hanging from the ceiling for an art installation. I've made a basic diagram that illustrates how I think I ...
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### How to calculate forces for most appropriate electric engine for soft sand? [duplicate]

I'm super new to this topic I'm posting here so please forgive the nursery question and content. I'm hoping to use any answers to help me begin my research and investigation on what I need to learn. I'...
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I have a 10 pound flywheel attached to a 200w motor that has a torque rating of 280Nm that can achieve a 12000 rpm. The gear ratio to the inner axial of the flywheel is roughly 1:1 which is 48mm in ...
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### Will this pulley modification result in more torque on my stepper motor

I have a Nema23 that has a 1.8 degree stepping resolution. The motor has a GT2 pulley attached on the rotating element. This GT2 pulley is coupled with another pulley, using a belt, which is directly ...
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### Required Motor Torque [duplicate]

I am interested in constructing an robot which will be responsible for supporting a 200 pound load. There will be four wheels and the diameter of the wheels are 8 inches. The robot will be required to ...
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### Calculation of torque at the base

Hope you all are doing good. Can anyone please guide me on how to calculate the different torques at the base as shown in the image? Thank you for your time and help.
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### How do I calculate the total force required for a linear actuator? [closed]

How do I calculate the total forcerequired for a linear actuator? The image enclosed shows a series of door panels, each with a cam that i would like to connect to a linear actuator on the right hand ...
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### Mechanical mechanism that regulates gear's rotational velocity

Please do note that I am a civil engineer not a mechanical engineer. I have a gear that rotates at a speed that varies with time. Usually, it rotates at speeds higher than the desired speed. Is there ...
1 vote
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### How can I add the torque of multiple gears?

If I have 3 gears meshed with a gear in the center of the 3 gears as shown in the picture. all of those 3 gears are connected to different power sources. They are free to rotate in the same direction ...
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### Does the amount of torque that can be transferred from wheel to rod change based on the distance of the connection to the rim of the wheel

Let's say I have a rod that I need rotating, like in a regular crank mechanism: Now, the motor I use is too weak to generate the required amount of torque to move the mechanism. So I put a gear with ...
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### Can I create a whirlpool/vortex around a horizontal axis in a flat bottle using motor?

I am using this flat bottle: I fixed a motor at the centre of one of the flat sides and attached an impeller. I thought this will create some kind of whirlpool effect but as you can guess, since the ...
1 vote
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### Does the turboprop engine torque get transferred to the engine mount and ultimately aircraft when engine is active?

When the turboprop engine is active, the propeller shaft rotates and causes the propeller to rotate as well, which in turn generates thrust. The propeller shaft rotates because of the torque (or ...
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1 vote
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### Do gears affect top speed?

Do more gears affect the top speed/acceleration of the car in any way? I know the gears won't increase hp since more gears would increase RPM but would decrease torque.
1 vote
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### Does the engine size affect torque and RPM?

I'm a bit curious about how exactly the torque and RPM could be determined from an engine. One website states that bigger displacement engines develop more torque while smaller ones spin faster, which ...
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### trying to find maximum torsional stress

I was wondering how I could get Ttmax (maximum torsional stress) or rather what the formula for it could be
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### torque for a machine shaft

this is a formula for torque and I was wondering for what P in this case stands for . . .
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### Rover Steering Torque

I would like to calculate the required motor torque to turn a rover wheel whilst the rover is stationary. I have modelled the friction force as a distributed force acting equally along the width of ...
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### How to evaluate motor rating?

I am trying to determine what type of motor to buy that can spin my load at high speeds without overloading it, but really, evaluating this is not my forte. I know this is not sufficient information ...
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### How can I cheaply tilt a 700 lb cactus?

We got some heavy rain last week and a 4.5 ft tall barrel cactus fell over. Assuming most of it is water, it probably weighs about 700 lb. I've read that if I moisten the soil, take care with the ...
1 vote
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### Why is the torque of an ICE low at low rpms?

Let us consider a basic 4-stroke single cylinder, direct port fuel injected naturally aspirated engine which is given a constant throttle. Now, why does it produce very low torque at low rpms, meaning ...
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