Questions tagged [torque]

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2answers
23 views

how to find torque from force due to pressures that change as a function of z

My teacher is very strict about copying his work so I will have to explain it. We have a wall with two fluids of different constant densities and depths. The wall is 'L' long. The wall has a section ...
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5answers
958 views

Ways to brake an axle

I am currently studying Mechanical Engineering and am doing an assignment where I have to design a wire rope tensioner where a wire rope is unspooled from a drum, but the wire has to be at a specific ...
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0answers
55 views

Advice on spring launcher project

I found an ingenious design of a spring ball launcher on grabcad and I'm interested in adapting it to accelerate a $43.7 \mathrm{~mm}$ diameter, $45 \mathrm{~g}$ golf ball enough to reach $65.5 \...
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1answer
40 views

What would the tension in the cable be?

A subsequent question stemming from here A massless motor is attached to a massless pulley(the blue circle) with a fixed rotational inertia and they are all attached to a mass X (the green platform). ...
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1answer
29 views

How to calculate the Torque required to rotate two bars perpendicular to each other

This question relates to a previous question (How to calculate the required torque in a static equilibrium system) where I have enquired about the start-up torque required to rotate a system. However, ...
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2answers
43 views

Torque required to start rotating a wheel about its center

Assuming i have a circular disc of a significant mass and diameter. Neglecting friction, if a motor is put at its center how do i calculate the torque required for the wheel to just start to rotate? ...
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1answer
37 views

How to calculate torque required to rotate assembly about the center

The image is a hollow cylinder: 2in OD, 1.76in ID. Connected is an angled bracket, 45 deg, that weighs 3lbs. The top rectangle piece connected to the bracket is 10 lbs,the dimensions are 31.1in x 14....
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0answers
21 views

Is a differential gear setup equivalent to a voltage divider?

I was wondering if a differential gear setup works equivalently to a voltage divider in the electric domain. As far as I understand, voltage is analogous to torque in mechanical engineering and ...
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0answers
29 views

Force necessary to resist motion due to torque on a drum brake

A drum is subjected to a counterclockwise torque of 16 in-lb. What horizontal force is necessary to resist motion? Coefficient of friction = 0.40 Weight is neglected. I'm having a hard time on this ...
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1answer
28 views

Determine applied force due to torque

I'm hoping for some clarification regarding converting torque to force at point of contact. I'm tightening some threaded components, the end faces of each are machined and will form a metal-metal seal ...
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0answers
26 views

crude spoke tension gauge

Standard bicycle spoke tensiometers are too large for use with small wheels, the kind used on recumbent bikes and folding bikes. Could a small adjustable or beam-style torque wrench be used to gauge ...
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2answers
88 views

Calculating required torque of stepper motor for manipulating blinds

I have a outdoors wooden window blinds and currently I am raising/lowering them manually - by pulling/releasing a rope that's hooked on them using pulley. It's the most basic setup but still I can't ...
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5answers
95 views

Preventing a DC motor from stalling

My team is trying to build a mechanical cannon for a final project for a course and we are running into some problems with our motor stalling. Our motor stalls when the plate hits either side of this ...
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0answers
23 views

Computing winch input torque for certain pull capacity

I am trying to calculate the input torque for my mechanical winch to pull 5000kg. I want to setup a slip clutch on the input shaft and adjust the springs to slip exactly on 5000kg to avoid any damage ...
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2answers
44 views

How to calculate the required torque in a static equilibrium system

I am working on a personal project where I need to select a motor to rotate a system that is in static equilibrium. The motor torque specification is given in kg.cm. This is what I have: Bar : 2 ...
5
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1answer
76 views

“Heavy-duty” or not, can my drawer slides really support this weight?

Okay, so recently I got a Dewalt 735 Thickness Planer. It's great at what it does. (It even LOOKS like it's ready to consume the tender flesh of lumber, like some twisted Victorian lumberjack... ...
2
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1answer
52 views

How much should I adjust torque specs for lubricated threads?

The factory manuals for motor vehicles give torque specs for most nuts & bolts. My (possibly incorrect) assumption is that these are for dry threads as would be used in a factory where no oils or ...
2
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1answer
30 views

Controlling torque required to turn a shaft

I have an shaft/crank that will be turned by the user. I want to precisely and dynamically control the torque required to do so. For simplicity we can think of it as a exercise machine (so the torque ...
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3answers
73 views

What is the relationship between the type of material(ex: steel, iron etc.), thrust and torque?

If I am drilling through bars of different material(ex: iron, steel etc.) of the same thickness and under the same conditions of drill operations(feed rate and rpm), how will the torque and thrust ...
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3answers
105 views

Statically determinate structure by adding moment

I'm considering the problem below. It's a setup with a roller joint and a pinned joint with a hinge between the two rigid links. Since there are now 3 unknowns for 3 equations and a zero moment at the ...
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2answers
814 views

Does a gear retain its mechanical advantage in a 1 2 1 ratio?

For example if the first gear has 32 teeth and the second 64, if the third also has 32 teeth would the output of the third retain the mechanical advantage created by the first 32 tooth gear powering ...
1
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1answer
54 views

How to calculate the torque for motors for a Core XY movment?

I am trying to design a simple setup that follows the core XY movement shown: I have been researching the statics behind this movement in order to calculate the minimum torque for the motor so I ...
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0answers
45 views

PMDC Motor Characteristic Graph

I am trying create a graph similar to as shown below. However, I am confused as to how the torque is related to the characteristics. The graph that is to be replicated for certain parameters: The ...
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0answers
50 views

Moment of a force in 3D

The question is not to help me get my task completed. There is the 3D statics problem that I have been attempting to solve for a long time. I have no help, hence I would like to pose you a few ...
3
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1answer
142 views

What is the maximum force needed to move the roller block from point A to point B and where does that maximum force occur?

Hello everyone. This project is for a very specific application and I am trying to determine the force necessary to get the block from point A to B. Specifically the maximum force necessary and at ...
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3answers
223 views

Mechanism for controlling the clamping force

I am working on upgrading a research project on wind energy. They are trying to measure the performance of wind blade designs in a small wind tunnel (i.e. their models are relatively small). What they ...
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1answer
30 views

Help with scaling torque and forces?

I am currently designing a ground based digging drill, that hopefully will be accepted by a commercial entity. I am currently working on the preliminary design of the robot and am hoping to move to ...
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1answer
51 views

How do I calculate the torque of a crank?

So, I have a crank that has a lever attached to a fulcrum, which rotates about an axis. But I also have a handle attached perpendicular to this lever, and the effort force is applied to the handle 90° ...
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4answers
46 views

Does the torque on gear varies with different gear arrangements?

Suppose that there is a gearbox with gear ratio 3000:3. The gear with 3000 rpm will have a smaller torque than the 3 rpm gear. My question is that will for different gear arrangement(i.e planetary ...
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0answers
39 views

How much torque is needed to mix melted marshmallow with rice krispie?

I am designing a robot to make rice krispie treats! More specifically, I want to use a fork to mix the melted marshmallow with rice krispie. I am currently specing out the motor, and since marshmallow+...
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0answers
42 views

Can we calculate the torque acting on the last gear determine teeth of the gears of the gear train in the below addressed manner?

The specifications of the generator is as follows: Efficiency- 70% Rated Torque- 0.56Nm Rated current- 14.3A Voltage- 24V Rotor shaft dimension- 1cm(diameter) The ...
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0answers
41 views

How come my calculated engine torque is so much less than the manufacturer's specifications?

Here are my calculations. Am I doing anything wrong?
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3answers
84 views

Torque required to rotate object around axis using Stepper Motor for Kinetic Machine

Hey all, I'm creating a machine to rotate a socket wrench using an arm attached to a motor shaft in order to make clicking sounds from the object therefore I'm trying to choose an appropriate stepper ...
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1answer
57 views

Torque Required for a stepper motor to rotate a socket wrench ratchet around an axis point

I'm trying to build a kinetic machine that rotates socket ratchet tools (e.g. https://en.wikipedia.org/wiki/Socket_wrench) to make a bunch of ratchet 'clicking' sounds for an art project. I'm trying ...
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1answer
17 views

Looking for the name of this torque-arm post (to order one OTS)

It is a post that has an arm that can swing out so that you can torque on the post. I've seen it before but not sure where!
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1answer
31 views

Assess bearing force ratings [closed]

Suppose that a ball bearing has axial and radial force ratings of 300N. If the bearing is to hold a 1m long shaft in its bore with a 1kg load on the end of the shaft, will the ratings be exceeded? The ...
1
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1answer
99 views

Calculate car acceleration from torque

I have data: mass = 740 kg wheel diameter = 670 mm Rw = 0,335 m power (max?) = 750 horsepower (551kW) Now I would like to calculate car acceleration when throttle ...
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0answers
52 views

How is motor torque related to capstan equation?

I know that capstan equation relates $T_{in}$ and $T_{out}$ as $T_{out} = T_{in}e^{u \cdot F_c}$, where $u$ is friction coefficient and $F_c$ is wrap (slip) angle. In my situation, the capstan is ...
4
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2answers
213 views

How to connect a motor shaft to a plate

I'm trying to drive an aluminium plate using a motor via a 20mm-wide 2mm-thick stainless steel tube. The tube is driven by a 6mm motor shaft via a pulley and the torque will be around 5Nm at most. Is ...
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1answer
90 views

Calculate Torque Required

I am working on a school project that requires me to build a machine. I have designed the machine but I am stuck at torque calculation. The problem goes like this, the machine supposes to rotate a ...
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1answer
25 views

What are the characteristics of a motor that will generate current and is powered by a 30 cc, 2-stroke small engine?

Problem: I am trying to hobby-build a generator using a (old, working, throw-away gas, yard blower) 30 cc, 2-stroke engine. The 2-stroke engine will spin a motor and I want the motor to generate DC ...
3
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1answer
25 views

What does the Torque vs Frequency plot mean for a stepper motor

I found this motor which I believed had interesting specs, but when I checked out the data sheet, the torque-speed graph was replaced by a torque-frequency graph! I do not know what it means. How does ...
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1answer
87 views

Calculating force transferred from pinion gear to rack

I am really challenged as I need to fit a bunch of motors in a 6" box acting as linear actuators. I was looking for linear actuators (most I found were brushed DC) at first but the ones I found that ...
1
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1answer
45 views

Basic intuition for motor torque

when shopping on digi-key or other electronics distributor, I can see the Torque - Holding spec, given in oz-in and mNm. I understand Nm in a torque context when the force is applied as a lever at a ...
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1answer
29 views

clamp force or torque for non-steel screws - brass or aluminum

It is common for screw tightening to have the relationship between torque and clamp force defined by: $$T=kFD$$ However, all the calculators seem to assume the screw is steel. How can this be ...
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0answers
24 views

WEC linear inputs

I have seen some designs being made for linear generators for WEC(wave energy) applications. A buoy driving a shaft. But what if the shaft inside was a rack and pinion? If you converted the ...
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1answer
55 views

Torque needed to draw back 220Lb's of weight?

I have a crossbow with a 220lb draw pull. I am designing a mechanism to draw the string back 12" as quickly as possible using a 1/2" ball lead screw connected to a 12 to 24v DC high torque motor and ...
3
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2answers
109 views

torque required to lift an object

I have a mechanical engineering question that I can seem to figure out. Basically I have an object this is being pulled down by two forces. Each force is 10N in the downward direction. There is a nut ...
2
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1answer
56 views

Modeling the torque of a real motor

I am trying to control a real inverted pendulum by means of a DC motor, for this I must model the torque of the motor, the work I've done in this direction is the following (which I believe is right): ...
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1answer
97 views

Required torque of climbing tracked vehicle

Currently I'm designing a tracked vehicle for a school project. It has to carry a weight and be able to overcome some obstacles which are about 3/4th the height of the tank. What I'm stuck at, is ...

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