Questions tagged [torque]

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11 views

Linear Motion Ratio on Eccentric Cam Pulley

If you have an eccentric pulley wheel and attach a rope to the top most vertical position and pull downward, the point at which the rope is fastened inscribes a circle with the radius of the distance ...
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1answer
18 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 ...
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1answer
25 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 ...
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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. ...
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2answers
26 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 ...
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1answer
67 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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17 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 ...
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1answer
37 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, ...
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2answers
33 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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47 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
38 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 ...
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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 ...
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2answers
30 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 ...
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1answer
57 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?
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1answer
22 views

Max torque given in engine specification is indicated torque or brake torque?

I want to calculate brake torque from indicated torque for motorcycle.
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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
44 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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32 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 ...
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2answers
44 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 ...
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1answer
57 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
33 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 ...
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1answer
26 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 ...
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2answers
84 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 ...
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2answers
35 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 ...
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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 ...
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1answer
30 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
41 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 ...
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1answer
48 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 ...
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2answers
380 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) ...
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39 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
20 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 ...
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219 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 ...
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2answers
120 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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29 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 ...
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1answer
235 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 ...
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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 ...
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1answer
92 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 ...
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2answers
122 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) ...
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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.
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1answer
62 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
110 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 ...
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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
861 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 ...
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1answer
32 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 ...
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1answer
57 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 ...
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1answer
103 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 ...
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2answers
79 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 ...
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2answers
76 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 ...
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3answers
108 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 ...