Questions tagged [torque]
The torque tag has no usage guidance.
156
questions
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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
41 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 ...
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1answer
35 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
20 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
23 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
33 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
21 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
24 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
40 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
...
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27 views
How to determine if my stepper motor will rotate this shaft
I have a stepper motor with the following characteristics:
- Holding Torque: 40 N* cm
- rotor inertia: 54 g*cm2
- drive torque 2.2 N * cm
This is the system:
the shaft is HDPE, and the ...
0
votes
2answers
39 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 ...
0
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1answer
52 views
Calculating needed motor to spin a disk at low RPM
I'm designing a machine that I need to spin a horizontal disk at low RPM using a motor and gearbox. I'm not good at physics so I need help to find a motor/gearbox to fulfill my needs.
It's a ...
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3answers
28 views
How to accumulate torque of multiple independent gears?
I did not find any answers to this simple problem across the web, maybe seeking help in this forum helps:
As an example, let's assume we have multiple windmills, each of them producing torque, but ...
0
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1answer
25 views
Could stepper motor lose torque because of overheating?
I have a stepper motor on a 3D printer that heats up very bad because of the heated extruder (it is actually controlling the extruder). When this system starts, it works fine at the beginning, while ...
3
votes
2answers
73 views
Reduction System for Gate-opener motor
I've been studying this topic for a couple of days now. I started by asking some questions regarding output Torque and gear ratios relations.
Now I came with the whole picture and some calculations ...
0
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2answers
32 views
How to calculate traction force w.r.t. rotational speed of a shaft mounted at a certain angle on a surface?
I am designing a new mobile robot platform and i need a generic solution for the robot in order to establish a proper mathematical modeling. My question is about calculation of the traction force of ...
0
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0answers
22 views
Gear ratio comparisson
I have been studying about Torque and gear ration in another discussion Torque and RPM calc, and I received good answers that make me go in-depth into this topic. To understand it better, I want to ...
0
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1answer
27 views
Measuring Torque in a bicycle [closed]
How to measure torque in a bicycle?
how much newtons will produce by the pedal of the cycle ?
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2answers
39 views
Parallel Axis Theorem for x and y Shift
I have a quick question about the parallel axis theorem.
Let's say I have a box-like object rotated about the following pivot point
I was wondering, by applying the parallel axis theorem, would the ...
0
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1answer
35 views
off-scale torque measured - what is my torque arm?
I have assembled a benchtop torque measurement stand for evaluating electric motor and controller efficiency.
The motor is 49kV , 5kW brushless outrunner.
Input power reading is taken from motor ...
1
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2answers
192 views
Calculating the torque required by an Archimedes screw pump
Given an Archimedes screw pump (shown below) how would you go about calculating the torque required to operate it? I'm assuming a situation where you have to design for a given flow rate, Q (m^3/s) ...
4
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0answers
25 views
Equation for the spring constant of an orthotropic, rectangular wire spring
I hope I can get some help with this problem as I've been struggling with it for a long time. I have a helical tension spring with radius $R$ and a square wire cross section and made of orthotropic ...
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0answers
19 views
Torque required to move the skid steer robot
I have a 4 wheel skid steer robot. My motor can deliver up to 6 Nm with a gearbox efficiency of 70% up to 170 rpm. I want to find out whether I will be able to make a pivot turn and move.
So I ...
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1answer
42 views
understanding required torque for a servo
Good morning. I have been reading the threads about "Understanding required torque for a motor lifting a weight" in hopes it would apply to my situation. I would like to utilize an R/C servo to rotate ...
0
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0answers
132 views
Mean diameter of the collar when calculating the raising torque
TL;DR
Is it possible to calculate the mean diameter of a collar?
Can I ignore the collar's component when calculating the raising torque?
I have been trying to answer this question, Z axis: Stepper ...
-1
votes
2answers
86 views
Motor torque calculation, about the units
This link shows a motor torque, power, and speed relationship, as shown below:
With regards to its units, how does kW and RPM become equivalent to N.m?
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0answers
28 views
Jam nut holding torque
I've got a leadscrew that has an M5-threaded hole on the end. The original purpose of this hole is to accept a screw with a slightly-oversized washer, which prevents the "nut" (don't know the proper ...
0
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1answer
174 views
How much torque do I need to lift 1,000 pounds?
So, I have a 1,000 pounds load.
What would be the required torque in inch/pounds to lift that load for a motor?
If the motor is installed at the center of the radius generating that torque, does it ...
0
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2answers
36 views
Would some manufacturing processes be more efficient if driven differentially by a single motor, up to ~150 kW, than multiple lower-rated motors?
I'm writing a discussion paper on the potential energy efficiency benefits of integrating different manufacturing processes by co-location on the same site. One possible field for integration is in ...
0
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1answer
83 views
The torque I need to lift the device and correct gear ratio for the device to be as fast as possible
The device have to climb a pipe vertically. I have a DC motor with power rating 21.2 w, output speed 13360 rpm and maximum output torque 154.4 gcm.
My device is 1 kg and I have wheel with 0.012 m ...
0
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2answers
111 views
Calculating proper specs of DC motor for rig driven on the rope
I'm trying to build a cablecam, a picture that serves only for illustration is:
The DC motor is
48V
5000W
6000rpm
6000 oz-in stall torque
85% effiencity
0.066 Ohms Resistance
135Kv (RPM / Volt)
...
0
votes
1answer
40 views
How much torque is needed? [closed]
If we wanted to open gate with maximum force that man can apply at distance of 1m from pivoted joint.
So I want torque to determine motor and gearbox that can be used to automate gate.
0
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1answer
53 views
How can you calculate the torque and speed of a single output gear being driven by two different input gears?
I am building a gearbox that needs to lift around 50lbs very rapidly. I already have a single planetary gearbox that does the job in around 7-10 seconds, but I would like to cut this time down ...
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1answer
95 views
Choosing a proper BLDC motor for lab centrifuge
I'm trying to make a swing rotor centrifuge and find a proper BLDC motor to reach 6000G with capacity of 4x50ml Falcon tubes. I did the calculations roughly but I'm not so sure about them and also ...
1
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1answer
30 views
How to increase kg per hr capacity of screw press to achieve the same applied pressure per unit volume of raw material?
The current capacity of screw press is only 100 kg/hr. Motor is 22kw, shaft RPM is 16, applied torque is 13,120 Nm, theoretical volume is 0.000967 cu m.
Am I correct to say the press is going = 13,...
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2answers
571 views
Torque required to launch a tennis ball
I am trying to find out if the 12 V DC electric motors that I have are powerful enough to launch a 100 g tennis ball 30 m away. The tennis ball is put down a pipe and ends up wedged in ...
1
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1answer
31 views
Torque computation for different attachment point
I have a pretty basic question but I would like to be sure of what I think.
I have a setup like the one in the figure. I have two motors which can generate two forces $F_1$ and $F_2$ perpendicular ...
2
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1answer
53 views
Understanding the torque of a motor/gearbox combo
Imagine a typical DC motor / planetary gear combos.
Is my thinking correct:
Say you have a 100 kg mass on a frictionless surface. The gearbox output shaft has a 0.10m arm with which you push the ...
0
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1answer
90 views
How to use the moment-of-momentum equation for water flowing through a pipe?
I am having a lot trouble understanding this problem, I don't even know where to begin or how to articulate my difficulties, but I will try my best.
Is the question asking to find the torque ...
1
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1answer
63 views
Calculate hydraulic torque from motor HP, hydraulic pump and gearbox
I am curious about the design considerations for a hydraulic system.
Let's say you have a 3HP 1200RPM motor
you also have a hydraulic pump that's rated 4LPM and pressure of 40MPA rated for 40RPM MAX
...
1
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2answers
69 views
Reacting Propeller Torque?
A motor is used to drive a shaft that is geared through 1:1 bevel gears to a propeller. The shafts are mounted on bearings in a hard casing that is attached to a 2nd ground. I want to know if the 2nd ...
1
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3answers
97 views
Why is the rear wheel of the Penny-farthing so small?
I see a lot of people asking why the Penny-farthing's front wheel is so big, and I think I've read enough materials to understand why (at least, at the most basic level). But even so, I feel that the ...
2
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0answers
60 views
Performance of RC car under different gear ratio, measured data vs hypothesis
Assuming the driveshaft of the rear wheeled drive RC car follows the linear DC motor theory for stall torque and no-load RPM, also voltage supplied is constant and no inductance as well. Note: the ...
0
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2answers
105 views
Resulting torque on the cross section
I have trouble solving part A of the question. I thought the resulting torque would just be 10k * L of the beam.
2
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3answers
69 views
Max torque allowed on cypress wooden beam
I am trying to calculate the maximum torque that a piece of cypress wooden beam can handle before it snaps or becomes structurally unsound. I know this will depend on the thickness and width of the ...
1
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1answer
54 views
Understanding Motor Torque calculations
I have an Aluminium square cross sectional rod of $20mm$ X $20mm$. Length 700mm.
At the end of this rod there is a mass of $660$ $g$ attached.
My question is what torque do i need to lift this mass up ...
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0answers
68 views
Measurement of ICE torque
I'm seeking a precise description of engine torque.
We talk about torque in terms of the twisting force that the piston exerts on the crankshaft with a radius equivalent of the rod throw.
Assume ...
0
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1answer
93 views
How to calculate the torque of 4 wheeled vehicle before slipping
I have a 4-wheeled vehicle that is 10 x 10 cm. Each wheel has its own motor. The wheel diameter is 3.1 cm. The total weight of the vehicle is 500 grams. The friction ...
2
votes
1answer
39 views
Can strain gauges radially be mounted on 8 mm diameter shaft for torque measurement for effective result?
I need to measure a torque on an 8mm shaft of an electrical motor on a prototypical device. The expected torque is ~15 Nm and for the data processing I intend to use an Arduino. One requirement which ...
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0answers
729 views
Determining required torque for a chain and sprocket conveyor belt
I am working on a project for an electronics class, but need some help with one of the mechanical details.
My job is to program a stepper motor to move a conveyor belt back and forth as specified. The ...
