Shaft Definition and 389 Threads

Hi all. I am not a mechanical engineer but I've been working on an idea which consists of a linear shaft with Reciprocating motion. Since the device only works with rather a high speed shaft, I wanted to know what are the speed restrictions of a linear shaft? So let's give it some numbers. The...

Hi all Need help to determine if adapting a pulley from a tapered shaft to straight bore will work. Can the clamping force be calculated for a tapered shaft to bore i/f and straight shaft? I have a professionally modified Porsche crankshaft in which 10mm of the tapered end was cut off creating...

I have short (12") vertical shaft. The shaft will supported at the top and bottom by a bearing. The only axial load will be from the weight of the shaft and gears on the shaft. I'll estimate the total weight of the shaft and gears at around 5 lbs. Shaft will rotate at around 1000 RPM. From...

Please bear with me, I am trying to design a shaft that will be under torsion. I do not know the diameter of the shaft and I would like to be able to calculate it by the things that I do know about the system. There's a 15HP 3 Phase motor running at 85RPM [there's a gearbox] This will be...

Homework Statement In the figure, a piston P is connected to a cylinder. The piston is connected to a rotating wheel with two shafts AB and BC. The shaft AB is connected on the periphery of the wheel. The wheel is rotating with angular speed ω= 100 rad s-1. At the moment A,C and the center of...

I have a 5/8" hex shaft that is turning at 90 RPM that I need to add a 2.7 N.m load to it. The shaft is running in a dust box. I would like to mount a fan on the hex shaft to create the torque but I am unsure how to calculate the torque that would be added by the fan. Would anyone be able to...

Dear Forum, Please see the attached file below. I have trouble understanding what happens at the light green gear which drives the big brown one. I read somewhere that the force that the belt applies on the surfaces of the two pulley's is the same, so 353, 68 Nm. The torque and rpm on both...

Long drive shaft of 5 inches fits into the end fitting and is rigidly attached by the bolts. Input torque is equal to output torque as we are ignoring losses from bearing. Let's assume that the load on the shaft is equal to 3*weight. (3 g's) (looking for more conceptual understanding rather...

Homework Statement [/B] The shaft connecting A to D is rotating at 1200RPM clockwise and has a concentrated unbalanced load of W2 of 8lb at a radius of 2in. in a plane midway between points A and D as shown in the figure. A constant vertical load W1 of 1500 lb is applied by means of two...

Okay, I will give a quick run down of what I am trying to do here. What I want to do is build a tesla turbine from old hard drive disks. Being that they're already rated for high RPM, it seems like a viable option. Now these disks are probably going to be aluminum and I am probably going to buy...

I have developed a mathematical model to study the dynamic behavior of rotor (with 6 dof). It is assumed that rotor is rigidly mounted at the mid point of shaft, and both end of the shaft is attached to ball bearing. I have developed the FE model for it too, and the frequencies in X, Y, Theta...

Homework Statement A shaft is being used as a cantilever and is held in the housing by its fit. It is to remain static whilst a gear is attached to the free end, how to you retain the gear on the free end of the shaft? Sketch a suitable method Homework Equations n/a The Attempt at a Solution...

I am curious how the deflection of a shaft changes due to rotation. In the force diagram image the green arrows show the rotational fixture locations and the purple arrow show the location of the applied force. The second image shows the deflection during a static test. If the force is applied...

The project I am working on is to design the control system for a shock dynamometer. I am using Labview and communicating to the VFD using Modbus. The shock dyno will look a little something like this; So one of the main objectives in my project is to produce a plot as seen below; The...

I have some conceptual doubts about shafts subjected to torsion. When studying Strenght of Materials, to find stress and strain in power transmission shafts, we consider that one of the ends of the shaft is fixed, with all degrees of freedom restricted, and the other one is receiving torque. I'm...

I'm currently in the process of designing a bearing housing for an axle. Unfortunately I am not 100% on the diameter of my axle yet but I want to have a clear understanding what tolerances to use on my axle to bearing bore and bearing outer diameter to the bearing housing. I've looked over the...

Homework Statement for the circular cross section shaft , why we need to put an sin60 as to get the area ? Homework EquationsThe Attempt at a Solution why the area shouldn't be pi(0.004) ^2 only ?

I have a plastic slinger (hdpe, I believe) that is attached to a dishwasher motor shaft that I'm trying to disassemble so that I can replace it's bearings. The sling will twist independently of the shaft, but it won't come off. I've been thinking of hitting it with a penetrating catalyst (PB...

Hi everyone, I have to calculate the critical speed of a vertical shaft. I have been looking on internet how to calculate, and I have found that this critical speed is based on the type of the supports of the shaft. The type of supports determine the deflection of the shaft (δ) and for this...

Suppose I have a motor driving a shaft that runs 1.5m long with a screw attached, the screw is mixing a product. Power = Torque x Speed Torque = Power/Speed To find my Torque I can use my Shear Max = Tr/J And J for a shaft is Tmax = (π / 16) τmax D3 My question is, where does the mass of the...

Homework Statement For the mechanism shown, determine the speed and magnitude of the acceleration of collar C in terms of b, θ, θ-dot, and θ-dot-dot. Check the attached file for the diagram. We are given the length b and angle θ. Homework Equations ΣF=ma The Attempt at a Solution I...

I was trying to figure out the velocity a 6mm diameter shaft would spin given a torque of 4000 N-mm. M =mass = .0227 Kg R=radius = .003 i=moment of inertia = 1/2*MR^2 = 1.04E-7 T/R=Force = 1300N <---Am I correct that this is force experienced by shaft? Bearing friction coefficient = .0015 iX''...

Homework Statement Homework Equations ωf = ωo = αt ∑τ = Iα The Attempt at a Solution [/B] 1) Find the acceleration ωf = ωo + αt (ωf-ωo) / t = α = -0.231 rad/sec 2) Find ∑τ ∑τ =Iα I assumed that the only torque acting on the turntable was the torque due to friction τfriction =...

What would the torque on a driveshaft be for a 8 ton vehicle in park on a 16% grade? Tire radius is 19". Axle ratio it 7.1.

Hi, I am a bit confused. So I have a shaft with a step on both sides so it gets really large in the middle. I am trying to model torsion on the rotor of a BLDC motor with FEA (or by hand calculations). If I apply a moment on the sides and fix the faces at the end of the shaft I get 1 result...

What formula can I use to calculate the force I need to apply to a sliding arm that makes a point contact along the edge of a rotating arm attached to a shaft driving a load in order to push the rotating arm to rotate the shaft? The rotating arm is 1 cm wide. The load at the shaft is 1 Nm...

Hi All I have a standard induction motor torque vs. synchronous speed diagram and I want to calculate the shaft-speed at any point along the curve (from 0% synchronous speed to 100% synchronous speed). I know that the synchronous speed is 1500 rpm at 95% synchronous speed (which is also at...

Hi. I am trying to determine the size of a shaft for a motor I am designing. The thing is, I can't seem to find shear stress alone for steel. I can find shear modulus easy though... But I don't really know the angle of twist. I know torque and I am trying to figure out radius. Should I just...

Homework Statement In a vertical piston cylinder assembly, a vertical shaft whose cross sectional area is 0.8 cm^2 is attached to the top of the piston. Determine the magnitude F, of the force acting on the shaft, in N, required if the gas pressure inside the cylinder is 3 bar. The masses of...

I have a hollow output shaft gearbox that will accept a 1-1/8" solid shaft, I want to extend the output shaft of a gearbox by 6 inches from the face of output seal to the end of the shaft. The manufacturer states that gear reducer is rated 899 lbs with the hollow shaft or a solid shaft that...

I am trying to design a drive shaft that breaks when i apply a specific torque to protect fro over torquing. I made a few samples, and now i am trying to compare the results to my equations. My problem is, none of the equations seem to match the actual results. Your help would be appreciated: I...

I used to know this back when i worked with Flash animation, but I'm working on a 3D printer now and I've forgotten, when you have a set of teeth, on a linear shaft and a gear, do you base the unrolling of the gear, for the spacing, on the inside of the teeth, the outside of the teeth, or the...

I have a shaft within a pipe, all horizontal. Shaft diameter is 2.875" and pipe inner diameter is 5". Shaft and pipe length is 650 ft. Shaft weight is 2500 lb. I need to determine the torque needed to begin rotating the shaft. The coefficient of static friction between the shaft and the pipe is...

I found this closed thread and I'd like to continue it: https://www.physicsforums.com/threads/design-question-wiring-motors.459672/ I am building a rotating ceiling mount (or rotating a floor plate) and am trying to solve the problem of the continuous rotation servo motor getting in the way of...

Homework Statement Homework Equations Torque = Force x Distance Shear stress = Force/Area 3. The Attempt at a Solution I know how to do this question as I've seen the mark scheme. However, initially I did it wrong. What I did was as follows: Torque = Force x Distance therefore...

Homework Statement A transfer car moves concrete slabs. Given values are wheel diameter D, shaft diameter d, rolling resistance FL , speed v, car weight mv , load weight mk , output power P at rotation speed n, average torque Mm , motor moment of inertia Jm , fan moment of inertia Jt and...

Hey Guys, So in the attached image I'm trying to determine what the rpm of the 60 tooth gear will be given the 8.4" tire will be rotating at .68 rpm, everything else is just an assumption on my part. I'm assuming the following which is probably wong: The tire being rotated at .68 rpm will...

Hello all, I am trying to figure out how to calculate the torque on a cam shaft. Say we are looking at this cam and cam follower: If we know that the total force downward caused by the cam follower is, let's say, 50lb, how do I determine the torque required of the cam shaft to rotate the...

Here is some background to the problem (in a stirred tank): "With yield stress non-Newtonian (viscoplastic) fluids, it is possible to generate an agitated volume around the impeller, defined as a cavern, surrounded by a stagnant region where the shear stress is insufficient to overcome the...

Homework Statement [/B] Homework Equations r[/B]BA= rA-rB UBA= rBA/rBAF= KS F= Magnitude of force S=Spring deformation >Lf-LiThe Attempt at a Solution So far I have found the components for RB and some RA, but the thing I'm missing is the R AZ. I know that at 0 and 90 degree the spring is...

The drive shaft of a truck undergoing acceleration twists a small amount. That twist defines a helicity. If you just know the rotation of a drive shaft you can not tell which way power flows but if given rotation and the twist of the shaft that can determine the direction of power flow? Thanks!

Technical terminology: what’s it called? A cylindrical shaft which rotates in a fluid medium and carries a set of radially-arranged blades (?splines) attached by hinges. The blades fold flat against the shaft when it rotates in one direction (say clockwise) but they sweep out automatically to...

A tyre on a shaft with a moment of inertia of 34kg m is initially running at 600rpm. It is brought to rest in 18 complete revolutions by a braking torque; reversed, and accelerated in the opposite direction by a driving torque of 675Nm. The friction couple throughout Is 160Nm. Find the braking...

Homework Statement Homework Equations tangential velocity v = ωr angular velocity ω = 2πf The Attempt at a Solution Not really looking for help to solve the problem. I'm just confused about the speed/angular velocity and frequency If the frequency of the motor is given as 24 Hz, then...

Homework Statement the tube has ID of 450mm, t= 6mm, OD= 462mm, pressure is 1.2MPa This is based on ASTM A36 steel, which have Ultimate Tensile strength 400-550MPa Yield Tensile strength 250Mpa Modululs of Elasticity 200Gpa Shear Modulus 79.3GPa Determine the factor of...

Hi all, I am working on a slider crank mechanism for moving an object of about 100 kg back and forth 30 mm at about 600 rpm. I plan to attach the connecting rod onto a flywheel that act as a crank, or attach to a pulley (in case need to use a transmission system to reduce input speed, increase...

I have a system that consists of a shaft and two selected gears. I want the shaft to be rotating at 250 RPM and to deliver an input power to the system of 850W. The input torque at the shaft is 71Nm. How can i use this information to determine how large my driving and driven gears will be...

This system consists of a shaft that is connected to a motor that is rotating at 200rpm. The whole shaft consists of two gears. The input power of the system is 500W. Is there a way i can calculate how exactly i can find the best material for my gears that is able to withstand the input power...

Hi, Struggling with calculating the angle of twist, using TL/GJ. The answer to (b)(i) is 946.1 Nm. Using 0.3 m length section. 946.1 * 0.3 / 75 x 10^9 * 2.047 x 10^-7 = 0.0185 * 180/pi = 1.06 rads Answer is 0.273. Question below (b)(ii):

hello i have a torque of 100 Nm. how to calculate the shaft size?