Questions tagged [torque]

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5
votes
1answer
56 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... ...
1
vote
1answer
41 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
votes
1answer
28 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 ...
0
votes
3answers
61 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 ...
1
vote
3answers
95 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 ...
1
vote
2answers
803 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
vote
1answer
35 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 ...
2
votes
0answers
39 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 ...
2
votes
0answers
46 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
votes
1answer
127 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 ...
3
votes
3answers
197 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 ...
-1
votes
1answer
29 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 ...
-1
votes
1answer
36 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° ...
-1
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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 ...
1
vote
0answers
38 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+...
1
vote
0answers
41 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 ...
0
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0answers
40 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?
1
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3answers
69 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 ...
1
vote
1answer
43 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 ...
-1
votes
1answer
16 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!
1
vote
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
vote
1answer
75 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 ...
2
votes
0answers
42 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
votes
2answers
88 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 ...
1
vote
1answer
75 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 ...
1
vote
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
votes
1answer
23 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 ...
1
vote
1answer
33 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
vote
1answer
39 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 ...
1
vote
1answer
25 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 ...
1
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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 ...
-1
votes
1answer
50 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
votes
2answers
77 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
votes
1answer
50 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): ...
1
vote
1answer
65 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 ...
1
vote
1answer
130 views

Running a well pump rated for 230V on 208V power

I have a well with a 1.5 HP pump. The pump is rated for 240V input. At the moment, the only nearby available power is 4-wire 208Y 3phase. I am considering connecting two of the three phases to the ...
6
votes
3answers
557 views

Three-phase versus single-phase operation of a generator

My generator (a Fermont MEP-803A, 4 cyl diesel, 10kW rated) can run in three distinct modes: Single-phase 120V, in which one terminal is hot, and another is neutral Single-phase 120V/240V, in which ...
4
votes
2answers
73 views

Linear actuator behind lifting boom

This is a follow-up on my previous question here: Sizing a motor for a floor jack-like mechanism The floor jack setup is clearly inefficient when it comes to electric actuators. Something similar to ...
1
vote
1answer
70 views

Sizing a motor for a floor jack-like mechanism

I've been trying, as a thought exercise, to run some calculations on a floor jack-like mechanism that is expected to lift 130kg (287 lbs). Dimensions and setup are as per the image below. The 130kg ...
2
votes
1answer
39 views

Lifting a Mass with one or multiple motors

I’m working on a DIY project and need some assistance. I have a single motor that can lift a load of 500 pounds. Is it possible to use 4 smaller motors to lift the same load as long as the 4 smaller ...
1
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0answers
15 views

how do you calculate viscocity from torque arm load cell measurements?

I have a piece of company developed equipment that uses a pot mounted on a rotating base plate with a 0.15m torque arm and load cell, a mixing paddle is used to stir the mixture while the controller ...
1
vote
3answers
91 views

How to calculate the torque created by a rotating motor?

I have watched this video where the speaker explained how the vertical spin of a quadcopter is stabilized, and how it could be unstabilized to make the drone rotate. Here is a screenshot of the video,...
2
votes
1answer
52 views

Torque between concentric gears

First time asking question here. I'm not a mechanical engineer! I have a simple question that I can't explain the answer to it. I have a double gear (2 concentric gears with different radius) and I ...
0
votes
1answer
19 views

Formula for finding the optimal weight for a given torque and vice versa

Whenever i see videos of two trucks pitting with each other to see who has a stronger, i always see comments that sounds like: If you load the other truck more it would beat the other one That truck ...
3
votes
1answer
52 views

Determining the required specs of Stepper Motor

Being a non-engineering type, I'm trying to calculate what power and torque I would need from a DC stepper motor to execute a particular task. I'm certain that my question will open me up to ...
1
vote
1answer
35 views

How to select the correct Bolt/screw Torque for sealing?

My coworkers and I are finally testing our agriculture sensor on the field. As you can imagine, the moisture and dust are important variables to keep aside from the electronics inside our product. ...
0
votes
2answers
77 views

Sizing an AC Servo Motor for lifting pallets

I am trying to size a servo motor and my basic physics and math is so rusted that I can't figure out how to go about it? The scenario is as follows: I need to lift an object in the vertical direction ...
1
vote
1answer
101 views

Driving Gearbox in Reverse

https://www.maxongroup.com/maxon/view/product/251601 https://www.maxongroup.com/maxon/view/product/gear/spur/gs45/301171 Consider that this motor-gearbox combination is backdriven so that the motor ...
1
vote
1answer
46 views

What criteria must apply for torsional effects on this beam to be ignored in calcs?

I'm interested in how to work out whether torsional effects can be ignored or not, in calculating the adequacy of a given steel beam in the following idealised eccentric scenario. Or, equivalently, ...
1
vote
2answers
186 views

Why torsional warping does not occur for shafts with circular symmetry?

When we twist a shaft/beam/rod, shearing stresses are produced. The angle by which the end of the shaft rotates can be found as: $${\displaystyle \theta ={\frac {TL}{GJ}}}$$ where $T$ is torque, $L$ ...

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