Bearing Definition and 186 Threads

Hi. I have issue of continuous failure of Track roller because of excess loading. I am looking for bush bearing with bearing pressure with 150 to 200 MPa @ 0.144 m/sec sliding speed & Friction coefficient shall be max 0.1. I will install a sleeve on the bush bearing & use it as a roller . Can...

Hello Guys, I'm building a vertical wave machine. I have a big bearing [2] (more like an eccentric) which is rotating by an electric motor with a constant speed of 0.359 rad/sec. When 3/4 of the bearing touches bearing [1] it supposed to rotate it a 1/4 turn, which as a result the ladder with...

Consider a steel rod of diameter 'd'. If the same rod is broken up into strands and arranged parallel to one another so as to form a new rod of the same diameter 'd' ,Which will have a higher load bearing capacity?. Instead of being arranged parallel , If they are made into a rope of similar...

The door is 4.5 lbs evenly distributed. Width is 7" and length is 19". The door is mounted by using a friction hinge at the center . How to calculate the total load acting on the hinge? What is the maximum load bearing capacity of the hinge? Length of hinge is 3.2" and diameter of pin is .230...

For a hollow tube inside a hollow tube, with a pin passing through both and a force pushing down on the innermost tube, what would the bearing stress be on the holes (assuming tube wall thickness is equal)? Would the equivalent reaction force be F/4 since the pin is passing through 4 holes? So...

Hi, I'm building a toy and I'd like it to spin around a vertical shaft but also move freely up and down while it is rotating. Also, I'd like that the rotating body will get spinned using a gear which will be positioned in a fixed location on the shaft (at the bottom) while the rotating body...

Hi, I am doing design calculations for a Variable Pitch Propeller and I have to calculate bearing life. A deep groove ball bearing is used for a mainshaft (driveshaft). And the mainshaft is connected to the propeller hub. I know the basic formula for calculating the bearing life but I am having...

Fluid or sleeve bearings use an off center shaft location to generate a hydrodynamic wedge in direction of rotation. This converging fluid causes higher pressure and can support a load applied normal to shaft axis during rotation. This action appears to be similar to the hydrodynamic support of...

Hi folks! I am looking for a ball bearing assembly that can be easily taken apart and re-assembled. I'm trying to test some ball bearings (the balls themselves) so its advantageous to have a housing that I can easily take apart and reload with a different type of ball without damaging anything...

I am looking at building a zip line in my back yard and using steel tubing as my end anchors with the following specifications 75' span / support 500lbs at the center / 1/4" steel cable / anchoring the tubing into a 8"x6' masonry wall and encasing it is concrete with an additional 4' of tubing...

Homework Statement A ball bearing rests on a ramp fixed to the top of a car which is accelerating horizontally. The position of the ball bearing relative to the ramp is used as a measure of the acceleration of the car. Show that if the acceleration is to be proportional to the horizontal...

I'm trying to determine load ratings for a deep groove roller bearing for use in a roller skate. I suspect I'll be looking at 100kg x 9.8N / 4 (2 bearings per wheel, likely only every to have a single set of wheels, front or back - 4 bearings - on the ground) * 2 (but this could be a landing!)...

Homework Statement The outer ring is rotating, the inner is fixed. n is the number of balls of radius r and mass m. the outer shell has mass M. the bearing (the outer shell) rotates with angular velocity Ω. what's it's kinetic energy. Homework Equations Moment of inertia of a ball...

I'm evaluating whether indirectly mounted Tapered Roller Bearings (http://goo.gl/FpOEri) are suitable to withstand a given radial and axial loads in both static and dynamic application. I've managed to find the required dynamic load rating C_90 (or C_10) with the help of the book "Mechanical...

Dear All, I'm doing an FMEA for Bearing that uses grease as the main lubrication. I've identified several failure causes for bearing overheating (above 90 degrees Celsius): 1) Overgreasing 2) Undergreasing 3) Loose Fits 4) Loss of Lubrication (leakage) 5) Wrong Type of grease used 6)...

After bearing failure of 24V, 15A dc motor. We change the bearing of the dc motor. But after changing it the motor is running forward/ reverse but there is no control over the speed. Where is the problem? Is that in the techo or drive card? Any body please help. Helping in highly appreciated...

Hello there guys I'm trying to find out which ball bearings I have to use for a new wheel hub I am designing. What I'm currently doing is a load analysis for the axis but I am confused on how would the forces that affect the wheel (normal, friction, lateral force when the car takes a turn...

The bearing of B from A is 120 degrees. What is the bearing of A from B?

Hi dears I am doing a random vibration analysis on a reciprocating rotary system and I need to calculate the load that applied to the bearing during the analysis. the picture is attached to post. thanks

I have been researching this topic for a while, and I wanted to get some feedback from people with more experience than myself. I want to create a slider, suspended by linear bearings, that will act as a scotch yoke. I'm wondering what type of bearings will give me the lowest energy loss to...

I am working on a project that uses a box design with a base. The base has two through holes on the the outer edges that will be used to slide up and down with in the box. The box will support two guide rods where the base can slide up and down. My intention was to use springs so that as...

Hi all, I'm new to the forum and have a query with one of my most recent assignments. This one is called 'The flywheel' to do with moments of inertia. I have completed the first lot of calculations using the formula no problem. My average experimental value came out at 0.49 kg m(2) And the...

I'm trying to work out the free body diagram for a router tool (which is basically used to cut wood sideways and create grooves and interesting shapes). I need to work out the free body diagram in order to find out the bearing load but I'm having difficulty with the aforesaid. The shaft that...

Greetings, I want to understand magnetic bearings better , i used google search but couldn't find a simple and satisfying picture or diagram. Could someone please explain the very basics? I would prefer in terms of permanent magnets rather than electromagnets because that would simplify the...

I have a tapped hole. A threaded rod goes through the hole. A single nut secures the threaded rod in position. Only one plate is threaded. Note the clearance hole in the top plate. A picture is attached. A friction joint in a bolt occurs when the clamping force creates a normal force. This...

I remember daydreaming one day (is that redundant?), imagining that I'm some technician in a cylinder bearing factory. At some point, I'm given a hollow metal cylinder of some given cross-sectional diameter. Next the foreman gives me a solid metal cylinder with a smaller diameter. This solid...

Hi, I am hoping to get some feedback on the following question please: Can permanent magnets, such as neo magnets be set up in a polar array configuration so as to act as a magnetic bearing? I have seen various examples of actively-controlled magnetic bearings that use finely-tuned computer...

We are using a smart phone app to add vectors; once we get the resultant angle, we need to determine what direction the vector is based on the compass. Can someone easily explain how to do this? Example: Using the app, we input a 2 knot current toward 230 degrees and a 0.7 knot wind speed...

The problem statement: A flyball governor is a device used to regulate the speed of steam turbines in steam power plants. The rotation of the shaft causes the two balls move outward. As the balls move out, they pull on the bearing A. The position of the slider A is linked to a valve admitting...

An airplane flew from city A on a bearing of 65 degrees to city B, a distance of 60km away. It then flew from B on a bearing of S 25 degree west to city C at a distance of 86km. Calculate (1) the bearing of C from A (ii) The distance between A and C

I seem to be unable to confirm to myself what's really going here. Basically, we have a rectangular shaped magnet with north and south at opposite ends. A steel ball bearing is placed to the left of the magnet where it is equidistant from the north and south ends. Consequently, a force...

Dear everybody here, Here is a problem to solve, from shigley handbook for Machine design, it's about Journal bearing design for the shown shaft in the attachment, i know how to design the journal bearing, but i am a little bit confused about how to get the reaction forces at the two points A...

I'm looking for a (needle?) bearing that can sustain shock loads of up to 2.5e5 N, at low angular velocity, but its outer diameter can't be greater than 30mm. as ridiculous as it sounds, any suggestions?

I am looking to accelerate a ball bearing through a 90 degree turn using an impulse from an electromagnet wrapped around a bent tube. What I want to know is what is the minimum radius turn you could use, obviously if the radius of the turn is too small the ball will simply impact the wall at the...

So, my company has quite a few old programs for calculating solutions to bearings, annular seals, etc. The calculations are iterative in nature, and none of these old programs are really integrated together, which is problematic. Plus they're in Fortran (or something else), and don't run on our...

Hello everyone, Being new here, and not a "Physics Guy" I wasn't sure where this should go, but General Physics seemed like the best bet. Recently I've been thinking about the effects of circular motion on external objects, and I've hit dead end with one of my trains of thought. Excuse...

I need a thrust bearing, it has to be like the one in the picture as in it needs to have a hole in the middle(a circle). However all the non 360 degrees thruster bearings I googled are not circle shaped, but I need free space, it would preferably have the same diameters as the pic but just 270...

In modern buildings (I'm talking about taller structures, apartments, etc. not houses) that have a reinforced concrete framework are the internal / external walls (usually brick, masonry etc.) ever load bearing? In the sense is the strength / integrity of the structure ever depending or...

I am trying to determine rod bearing load when a 90 foot pound torque starter motor stalls. I have drawn the geometry in the picture below. I am figuring using a 10 tooth starter gear & a 153 tooth flywheel, so I calculate 15.3 x 90 ft lbs = 1377 ft lbs torque at the flywheel. So if I consider...

Now I think there are arguments for the Fine Tuning of the universe. I like Martin Rees' book but I know there are others who disagree with what he said in his book (Just Six Numbers) On another forum I've got involved in a discussion on this topic and I've seen an argument that I think has no...

Hi, I was Googling about the following question : "Ball bearings can be made by leting shperical drops of molten metal fall inside a tall tower - called a shot tower- and solidify as they fall. If a bearing needs 4.0s to solidify enough for impact, how high must the tower be? What is the...

For context: I'm building a handle that needs to rotate in all directions. The handle will be placed inside the spherical bearing - and the bearing will allow it to rotate as it's required to. The handle will also need to be able to be locked in place at angles chosen by the user. Whatever...

Homework Statement Need to know the bearing load for a linear slide I'm working on, two spaced bearings with an extended load off the end of the slide. Homework Equations What equation do I need to apply? What examples are out there? The Attempt at a Solution

Hello, I see that the TRBs (Taper Roller Bearings) are paired usually in 'X' or 'O' configuration. Can somebody pl. share the situations that drive towards choosing a specific configuration? Thanks.

Hi all, I have recently started my machine design course in engineering and I am finding the topic of bearings difficult to follow. I understand the need for bearing.What I cannot understand is what axial,radial and tangential loads will try to do with the bearing (especially the tangential...

Homework Statement The uniform slender bar is pivoted at and swings freely in the vertical plane. If the bar is released from rest in the horizontal position, calculate the initial value of the force exerted by the bearing on the bar an instant after release. I have attached an image of...

Homework Statement The position of piston Cd is locked and force P = 350lb is applied as shown. The diameter of all pins and bolts is 3/8 in., member BCE has a thickness of 1/4 in., and member Ef has a width of 1 in. adn thickness 1/4 in. Homework Equations The Attempt at a...

Homework Statement A ball bearing is placed on a track curved in the vertical plane. The ball bearing is released from a position on the track above the lowest point and it then oscillates with SHM. As the amplitude diminishes does the time period for each oscillation stay the same...

first what's the difference between bearing and shear. I managed to solve a easily. for part b i calculated fb(√(bx^2+by^2) and divided by ∏*4^2 I don't know how to solve c.

One question that I have been thinking about for a while is if you were to use magnetic bearings (no physical friction) for a type of motor and put energy into it by spinning it and slow it down with another magnet, where does the mechanical energy go? If there is no physical contact with the...