Shaft Definition and 370 Threads

Homework Statement A solid circular steel drive shaft is 4 m long and 60 mm diameter. The modulus of rigidity of the steel is 85 GPa and its maximum allowable shear strength is 150 MPa. The shaft is used to transmit a power of 30 kW while rotating at 500 rev/min. Calculate the following...

Hi Doing some revising for my exams with past papers. I just need some help to begin this question. Q The shaft of diameter 0.25 is rotating at 3000 rev/min Determine a) The angular velocity b) The linear speed of a point on the circumference of the shaft c) The angular...

Homework Statement A turbine shaft is to transmit power at 240 rev/min. If the shaft is 1 m external diameter and 25 mm thick and the maximum shear stress is limited to 69 MPa, find the power transmitted. Homework Equations The Attempt at a Solution T=J*stress/r =...

Hi i need help calculating the shear forces on a pulley shaft. The pulley of the shaft drives another pulley conected to an alternator. the driver pulley is 160mm in diameter, the driven pulley on the alternator is 140mm. The distance between the pulleys is 664mm and the belt length is 1800mm...

Preheating was carried out on a 4140, 2 inch dia. solid shaft material prior to welding of linkage plate and bearing was attached on the shaft. Temperature range is around 400 to 450 degree celsius. Welding was performed and followed by Post heating of temperature range 560 to 570 degree celsius...

Hello I have done a Soderberg shaft design calculation, taking into account the stress concentration for a keyway. However, I've just noticed that I might need to adapt this for a feather type keyseat, or 2 (parallel, 180deg apart) keyways in the same cross section. I'm sure I read...

PF, I need to design a cart that will move (horizontally/linearly) a load of ~40,000 lbs including its own weight (about 6500 lbs) at a total distance of 70 ft on a set of rails. Known data: 1. Cart will need to move at a distance of 1 ft/s 2. Diameter of the cart wheels (4) is 15 in...

Is it possbile to spin a disc that has a hole in the centre like normal DVDs but without using a rotating centre shaft that is passing through the hole? The spining disc has to be supported too by a structure. Is there any mechanism to recommend?

Sportnut: If I am using exact same aluminum material, with exact same thickness of gauge and I construct a 4ft long hollow circular tube that is 1" diameter, and I also construct a 4ft long hollow rectangular shaft that is 1" square, which would be more resistant to bending?

Background - I am a retired aeronautical and mechanical engineer (70 years old) and closed my consulting/manufacturing firm about 2 years ago. My technical books are still in storage and I can't get to them right now. A friend has asked me to assist with some machine design calculations and...

A shaft is required to transmit 60kW of power at 4000rev/Minute. Find the external diameter required for a hollow shaft if its internal diameter is three quarters of the external diameter. And the maximum permissible shear stress is 48MPa. can someone help i am confused haven't got a clue...

Homework Statement Calculate the power that can be safely transferred by a medium carbon steel shaft of 100 mm diameter at 150 rpm ? Homework Equations Assumed solid circular shaft. The Attempt at a Solution Material : Medium Carbon steel t=580 MPa y= 50 mm k=6 ( table 9...

I'm new to the forum and hope someone can help me out. I've attached a picture so hope it works. I have a ladle for pouring metal, the mass of the ladle itself is 60kg and the max. mass of material that can fit in the ladle is 90kg. Total mass 150kg. The ladle has a tapered profile, so the...

I have a rather simple question but not having had physics since college, I am unable to find the solution to a problem. Given a shaft with a 500 lb wheel mounted to it how would I calculate the torque on the shaft? The wheel is 2 feet in diameter and 2 feet wide. The shaft is 2 inches in...

Hello everyone, I m working on a project that I want to create linear motion to carry a load which is constructed eccentricly as you see in the picture. I am looking for the equations about calculating the lineer bearing length and shaft diameter. In this construction, I am using two...

I read an article about Brake Shafts bending behavior due to braking. Assume that there is a Shaft and to its end a brake disc is fixed. The shaft is set to rotate at certain rpm. Now when brakes are applied it seems the shaft tend to bend. Could anyone explain me the reason for this...

This is more of a general question i want apply to a problem i am working on. If i was standing on a cart with four wheels an i am holding a string that is wound around the axel of the back wheels. So as i pull the string it unravels around the back axel turning the axel and moving the cart. I...

I'm analysing the forces on a vacuum roller brush in an effort to determine the power and rpm's that will be required of an electric motor to rotate the shaft. At anyone time there will be three contact points with the bristles to the carpet. Assuming we want the roller brush around 5000 RPM...

Homework Statement Given: hollow steel shaft Torque = 5400 Nm Torsional Shear = 150 MPa Required: Inside diameter Outside Diameter Stress on the inside of the shaft Homework Equations The Attempt at a Solution I solved both the diameters which are 64.49 mm and 48.37 mm...

Homework Statement Shaft diameter: 0.2m, Torque: 150 KNm, Axial Thrust(compressive): 520KN Trying to find the angle between maximum principal stress and shaft axis and then to draw the mohr's circle to confirm this results Homework Equations The Attempt at a Solution I...

Hi, i have a shaft with OD = 33.40mm Wall Thickness = 3.38 mm length = 2.4m Density of shaft = 2750 The weight per unit length that is given is 0.8555 kg/m My question is how did they get it as I am...

Homework Statement A gate with the shape as shown is mounted on a horizontal shaft. Determine the net moment about the shaft from the hydrostatic forces acting on the gate. Answer: 750kNm Homework Equations h_c: height of centroid = y_c * sin(theta) y_r: location of force or centre of...

im working on a question that requires me to calculate the minimum shaft diameter for a maximum shear stress. the value is 80mpa. The factor of safety is 1.5, now I am aware that i can't simply increase the shaft diameter by 1.5 to do this correctly. Should I calculate a suitable diameter for...

Homework Statement Basically, this is the problem. [PLAIN]http://img180.imageshack.us/img180/3598/physicsproblem.png It's related to some design research I'm doing regarding a centrifugal control valve. This is a type of valve that controls the fluid flow based on the centrifugal...

Homework Statement HI Can anyone help me in finding out the polar moment of inertia of a hollow shaft with 3 circular slots . Its used in design of DIVERTERS in oil and gas application. Homework Equations The Attempt at a Solution

Gentlemen, Here is my scenario. I am building a new project utilizing a PMG that produces 5KW at 840V at 189 RPM. The manufacturer is supplying me with a torque curve that does not appear to be correct. They say, at full power extraction it has 350Nm of shaft torque. Is this correct? If so...

how to rotate the shaft and to move it linearly in a single axis

Alright I am trying to measure the "instantaneous" velocity of a swimmer at around 400Hz. I plan on attaching the swimmer to some nylon rope or something similar and having the rope go into a "box" that will use pulleys, a wheel mounted to a shaft and shaft encoder that will rotate freely...

Homework Statement A solid circular shaft has a diameter of 200mm. What would be the dimension of a hollow shaft which could replace it (i.e. transmit the same torque for the same maximum shear stress), and what would be the percentage reduction in the material required? The internal and...

Hey guys, I working on a bearing design project for a mech. design class. The bearings will be used to support an automotive drive shaft, and I was wondering: 1) if there were any axial (thrust) forces introduced to the shaft by the engine and whether they are negligible or not 2) if...

Homework Statement A 5hp, 1755rpm, WEG Motor (part #00518OP3E184T) needs to turn another shaft that is 12" away at 1000rpm. Homework Equations Torque=HP*5252/RPM T=F*r -> F=T/r Drive Ratio = Driver Pitch Diameter/Driven Pitch Diameter Sum Forces Sum Moments The Attempt at a...

Hi, I have a DC motor that have these dimensions: http://www.micromotorssrl.com/motor_l149/L149.pdf and the problem that i have is to make the "D-hole" in a solid 6mm steel shaft. At the bottom of the hole i was planing to put a neodymium magnet so that you easily could remove and put back...

Homework Statement Calculate the motor size required to drive shaft A. (shown in schematic 1 diagram) Drive shaft rotates at 75 Rpm. Weight of plunger + attachments = 30kg's Dimensions of plunger given in schematic 2. Homework Equations Work done = F x d (distance...

I am designing a fan blade which is attached to a generator. The unit will be submerged in water. The blade will be attached to the generator by a shaft. The device is semi-enclosed in a cylinder with the top and bottom open. The force of the waves will cause the propellor to spin. My...

I am trying to figure out the speed that a motor shaft is running at but i have no reference materials to work with. I had to place a tachometer on the outside of the shaft as there was no centre drilled hole to work from. I got the following results: Diameter of tachometer: 31.5mm Diameter...

I am having trouble finding the method to figure out if a shaft has finite or infinite life if it is subjected to a fluctuating load. I know how to solve for n(factor of safety) in these types of problems. Is there a value that if n is above it has infinite life.

I'm looking for a right angled dual output shaft gearbox like the one attached I can't find one anywhere, just parallel dual shaft gearboxes. Anyone know a supplier or website for these? Do they even exist?

Homework Statement How many revolutions does a driving shaft of an eight cylinder four stroke engine perform until every cylinder has ignited once ? Homework Equations 4 - 8 - 6 - 2 The Attempt at a Solution Moreover, I would like to have information and understand the logical...

Homework Statement " determine the diameter of a replacement solid shaft manufactured from the same material and subjected to the same maximum shear stress and torque" Ok so I previously calculated the following: Maximum shear stress= 35.8 x 106 Torque= 450.117 x 103 Hollow shaft...

I have a grade specific query. We are currently using 35 mm dia shaft of 1020 grade steel. We want to upgrade to 4140 steel of same diameter. Researching on google and this forum i found out the ultimate tensile strength of 1020 grade is 710 MPa and UTS of 4140 grade is 1080 MPa. But that's...

Homework Statement Nevermind the rough picture, the shaft is cylindrical. Knowing that the post has a diameter of 60mm, determine the principle stresses and the maximum shearing stress at point K. Homework Equations These are equations for your reference: \sigma = My/I \tau = Tc/J Where...

Hello, I apologize if this question appears simple; it may be but I cannot find the answer in any of my textbooks. I want to turn a shaft with a diameter, d, and length, L, which has a plate attached at the end, of diameter D. I made up a side view of what I'm trying to illustrate in...

A 180 degree movement (12 o’ clock to 6 o’ clock in a clockwise direction) transposed into a180deg shaft rotation with no mechanical components present at the pivot point or in the swept arc after movement (i.e right hand side of clock face) Example: I’m currently designing a sophisticated...

Homework Statement Consider a hollow drive shaft of length L, inner radius b, outer radius a. A constant torque is applied (we can assume one end of the shaft is fixed because we're applying a constant torque T regardless of the angular velocity of the shaft). We know material properties of the...

Homework Statement A shaft is turning at 73.8 rad/s at time zero. Thereafter, its angular acceleration is given by a = -10.1 rad/s2 - 4.44 t rad/s3. where t is the elapsed time. Calculate its angular speed at t = 2.58 s Homework Equations 1/2(Angular accel formula)+ 73.8t+0= theta...

Hi, I am working on a project and my friend said to me the gas turbine shaft power is 'x' amount of power. It is directly coupled to a generator so the power to the generator is the same 'x' amount of power. How does that shaft power relate to the output of the generator? The shaft spins...

I have a AC induction motor,i use a strong clamper to lock the motor shaft.Then i switch on the power supply.? So,i want to ask is there the motor will become short circuit? Can i know what is the cause for this malfunction?Is that the motor stator burn out or they still got other reason...

hi there, i need some advice please. I am a farmer that wants to press some oil seed rape. i have a tractor that produces 80 kw of power at its pto shaft (Power take off) and i want to use this rotational power to produce a reciprocating motion eg back and forth motion. The pto shaft has...

Homework Statement An 8” long, 2.5” diameter, solid bar of Class 40 cast iron is subjected to both a torque of 75,000 lbf-in and an axial compressive load of 165,000 lbf. If these two loads can increase at a constant ratio, calculate the safety factor.Homework Equations \sigmax=F/A \tauxy=Tr/J...

Homework Statement An aluminium sleeve of internal diameter 4.000cm at 10 degrees Celsius is heated and slipped over a steel rod of diameter 4.040cm (at 10 degrees Celsius. When the aluminium sleeve and steel rod return to room temp they are impossible to separate. Assume that the...