Questions tagged [torque]
The torque tag has no usage guidance.
193
questions
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1answer
27 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 ...
0
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0answers
26 views
About beam bending moment
How do I find the bending moment under the distributed load?
I only see going through the area to get it but even then I am not sure always if I need to take the larger surface or the smaller one.
...
0
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1answer
27 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
43 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
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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
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0answers
40 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
37 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
63 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
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1answer
31 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
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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
30 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
45 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
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0answers
39 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
51 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
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1answer
72 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
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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
votes
1answer
21 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
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1answer
24 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
31 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
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1answer
22 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
48 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
58 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
46 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
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1answer
35 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
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1answer
80 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
484 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 ...
3
votes
2answers
59 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
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1answer
60 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
38 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
72 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
51 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
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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
50 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
34 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
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2answers
57 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
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1answer
93 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 ...
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0answers
20 views
Circling Morh's Circle (question on tensile stresses)
If I have a mechanical part subjected to a unkown torisional force with the specification that tensile stress should not exceed 150 MPA, how would I form the Morh's circle.
I know that I have (150 ...
1
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1answer
42 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
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2answers
115 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, $L$ ...
2
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0answers
171 views
how to calculate required torque and rpm to through a 160 gram cricket ball horizontally at 160km/h velocity?
I am going to design a bowling machine. In this design, I'm going to use two motors that are being placed vertically and their shaft are attached with two horizontal identical wheels with a space of ...
1
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1answer
44 views
Help me build a mechanical gizmo involving a pulley (I think)
Electrical engineer here. I'm looking to build an incredibly simple mechanism that in my mind involves kind of a pulley. Below is a diagram.
So it's essentially like a mechanical servo. I would like ...
0
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0answers
21 views
What is the top limit for torque per diameter ratio for electrical rotation mechanism working in a tube?
Use case: industrial stop valve placed in an another pipe welded perpendicularly making a T-shape.
To make the question more specific let's consider 50mm inner diameter pipe for the linear actuator ...
0
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2answers
93 views
Measuring shaft torque of a small motor
I would like to determine the mechanical output torque and power of a small motor without using expensive strain guages and similar and have come up with the idea of determining the maximum mass that ...
0
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1answer
89 views
How can I calculate the power and torque required for the motor on a wheeled robot/vehicle?
How can I calculate the power and torque required for the motor on a wheeled robot or vehicle if a particular acceleration or movement up an incline is required?
0
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1answer
46 views
Max torque given in engine specification is indicated torque or brake torque?
I want to calculate brake torque from indicated torque for motorcycle.
0
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1answer
25 views
doubling the existent two brackets - will it help with my grape press?
Here is how the top of my grape press twists as I pull the car jack downwards (marked blue). I was wondering if adding another bracket (marked purple) on each side would solve the twist issue. Thanks!
...
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2answers
52 views
A few questions about cars
When I start the car, why do I hear the engine working when I'm not pressing the gas pedal?
How exactly does the torque and power of the gears work?
Torque = Radius * Force
Power = Torque * Speed
...
0
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2answers
75 views
When does torque applied on a shaft produce bending and when does it not?
In both cases in the picture above torque is applied to the shaft, however in the first case the force $F_{c}$ also produces bending across the shaft. So my question is, how do I know if a torque ...
