# 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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### 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 ...
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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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### 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 ...
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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 ...
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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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### 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.
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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 ...
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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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### Raise/Lower 350lb Sawmill Head 12v Motor Specs

I am new to this site and have a problem to solve in an area that I’m pretty lost in. I can usually figure stuff out with the help of the internet and some digging but not getting real traction so ...
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### Will a motor with 1,16 Nm rotate a 50 mm gear moving about 12 kg

I'm not an expert in mechanics, so this is my question. I will buy the motor of the image below to move my door. In the motor shaft, there is a gear with 50 mm of diameter which will move the door. ...
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### Dividing torque of one axle to three in varying proportions [closed]

I want to power a small mechanical monstrosity, which performs three tasks that require three separate axles. For the powering, there's a hand-operated crankshaft connected to the primary axle that ...
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### Effect of multiple shear pins used in combination in a coupling

Does using multiple shear pins under a limiting torque case reduce the minimum required shear pin diameter for the coupling or is the complete load distributed over the shear pins regardless of the ...
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### Calculating the diameter of screws that are on radius 160mm from axis of rotation. I need help - I don't know If I'm thinking in the right way

First of all, english is not my first language so if there are some mistakes I made - I'm sorry and I hope everything is understandable. The example I am trying to solve reads the following: The gear ...
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### How do you calculate the shear force on the screws that connect a door to a jamb via hinges

I'm trying to calculate the shear forces on hinge screws or bolts. Here is a schematic of the door with the relevant values: First, I took a free body diagram of the door and its hinges. The ...
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### What size feet for this wind-protection panel?

I need to create a series of free-standing perspex panels to add height to an existing fence for wind-proofing purposes. My idea is that each panel would be fixed to two supporting poles that are ...
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### Fun Force Problem - Basic Structure of Two beams supporting weight

I'm very new to engineering and thought I'd start with some basic problems and test them out with my own constructions! I've come up with this fun problem and would love some help solving it. Say you ...
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### calculate torsion in a diffrent sized shaft

first of i know it seems like a homework assignment but it does not, it is calculations i need to do at work and it has been a long time since i studied this material. so I need help to calculate if a ...
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### How does the diameter of a worm gear affect the amount of force needed to turn it

Can anyone help inform a discussion I'm having with fellow modellers on a model railway forum? I have a locomotive powered by an electric motor turning a 20mm diameter worm gear meshing with a spur ...
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### Magnetic Force - Point of Load

I am using a Magnet like this in an assembly and I am trying to calculate the torque in point P2 (see picture below) resulting from the attraction force F between my magnet and the steel part. As I ...
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### How to switch between two cores (inside the coil) in a simple brushed DC

I am going to build a very simple brushed DC motor. The rotor will not be enclosed in a stator (the rotor will be built on a bench with free space around it), and I will using permanent magnets to ...
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### What does reactive power translate to in terms of torque?

Say I'm trying to connect an AC generator to a circuit containing an inductor and a resistor, powered by a steam turbine. I understand that because of the resistor, I'll be dissipating energy and ...
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### Designing clamp band - coaxial force in screws, zeroing torque in structure - Calculation problems I can't simplify my mindset (help)

At first I want to apologize while English is not my first language. I am a student, and I have to design such configuration: I already have designed the "fork" (the part on the right side)....
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### Is there any mechanical engineering solution that employs 'ankling', as per a cyclist's ankle/foot/pedal setup?

A cyclist will have the pedal spindle somewhere under the front part of their foot, usually around or just behind the ball of the foot. This means that the ankle is part of the driving movement - at a ...
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### Determining max shear stress

So I understand that shear stress can be either in the the form of transverse or torsional or both at the same time. And normal stress is due to the moment or a force normal to the surface. My ...
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I am in the process of building an antenna mast that can tilt from horizontal (down) to vertical (up). The mast (arm) is 360" and weighs a total of 105 lbs. I need to calculate the amount of ...
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### Mechanically increase motor torque

An electrical engineer here. Using a stepper motor for a robotic arm. A stepper motor at the base of the arm has a max holding torque of 6kgcm. The arm is around 30cm in length from this base motor ...
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### Mechanical Engineering: How To Amplify Kinetic Energy In Axial Rotational Gear Machinery? [closed]

When I originally posted this question 2021-04-08, I was inspired by pulley physics, especially after viewing these videos at this link and this link and this link. It is not necessary to go to these ...
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### Calculating Z-axis Torque on a 3-D Printer

I recently built a large CoreXY 3D printer and I am wondering if my 4 z-axis stepper motors combined will have enough torque to accelerate the build plate with a heavy 3d print. During the building to ...
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### Computation of the moment of restoring forces for a floating vessel

Some slides associated to the book Handbook of Marine Craft Hydrodynamics and Motion Control (2021 edition) are provided by the author of the book here. At page 12 of the slides for Chapter 4, the ...
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### Rubik cube torque experiment - Correct equations and experiment set up?

Background I am attempting to experimentally find out the average torque required to rotate a single face of a Rubik cube. Little to no data is available as it varies from cube to cube. Some people ...