What is Bearing: Definition and 184 Discussions

In navigation, bearing is the horizontal angle between the direction of an object and another object, or between it and that of true north.

Absolute bearing refers to the angle between the magnetic north (magnetic bearing) or true north (true bearing) and an object. For example, an object to the East would have an absolute bearing of 90 degrees.
Relative bearing refers to the angle between the craft's forward direction and the location of another object. For example, an object relative bearing of 0 degrees would be dead ahead; an object relative bearing 180 degrees would be behind. Bearings can be measured in mils or degrees.

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  1. S

    I Beam Trolley Bearing Type

    I am having trouble finding the difference between and I beam Trolley with a roller bearing and a sleeve bearing? I know that the roller bearing has 4 wheels that sit on the bottom base of the I Beam and roll back and forth but I am not sure how a sleeve bearing is different from that? Thanks
  2. I

    Wind turbine blades and bearing calculation help

    Ok I have a design project that I am working on for the University this semester. Having a bit of problems trying to figure out and issue revolving around the wind force on our savonius blades. We are trying to make sure our blades will rotate with a wind speed of 10 mph. We have the blade total...
  3. N

    Find Magnittude of the Force Supported by the bearing O

    The two light pulleys are fastened together and form an integral unit. They are prevented from turning about their bearing at O by a cable wound securely around the smaller pulley and fastened to point A. Calculate the magnitude R of the force supported by the bearing O for the applied 3.5-kN...
  4. A

    Calculating Bearing Stresses between Two Flat Surfaces

    hello there ... i am in the middle of stress-strain calculation..and got stuck-up at bearing/contact stresses how to calculate bearing stresses in two flat plate...? most of the engineering books has mentioned about bearing stresses/contact stresses between two circular bodies and which...
  5. W

    Calc Bearing AC from AB & Angle A-C: ddd.mmss

    If AB has a bearing of following 97° 49' 45" and a anti-clockwise angle from A to C is measured as 71° 6' 12". Calculate the bearing AC (enter as numeric value of ddd.mmss e.g. 100° 20' 30" would be entered as 100.2030). I am very stuck here and unsure what is really being asked. Can...
  6. T

    What's this steel bearing plate going to do under this steel I beam?

    I'm doing some work on my house at the moment, and have had a design produced by a structural engineer for a steel I-beam to span a newly made (4 meter) opening in a brick wall. They've given me a design (see the attached picture for my interpretation) for the bearing of the I-beam which I...
  7. G

    Small silicon nitride ball bearing

    Hello, I need a small cageless, angular contact silicon nitride ball bearing (preferably deep groove) that is roughly 5 mm to 7 mm in inside diameter. This is to be used in a small model jet engine. I have been looking for hours but can't find anything. Does anyone know where I can get a...
  8. M

    Custom Rack and pinion bearing

    Hey, I'm wanting to create a custom Rack and pinion set up where force is applied to the rack, turning the pinions. In order to do this what would be my best method of bearing? Can this be integrated into the design of the Rack itself? Also if the rack were to be curved what would be the...
  9. S

    Load bearing of 2 alluminum square tubing

    load bearing of 2" alluminum square tubing im trying to build a load bearing beam out of 2" alluminum tubing 1/8 in walls can anyone tell me the weight a length 8feet long could bear befor bending its aa6061 T6 what would it hold befor bending? keep in mind math is not my cup of tea lol
  10. J

    MHB Math Exam Woe: Unsolvable Bearing Question

    So basically, this one question messed me up in my maths exam today. Everything we went over yesterday concerning tangent lines/derivetives I went pretty well in. The question was. There are two lookout points. A and B. There is a campirefire at a bearing of 40 degrees from A. From point B, the...
  11. M

    Conversion from aircraft bearing to normal degrees

    I have a list of bearings that I want to convert. The normal degrees circle is oriented with 0 to 360 going counter clockwise. I have degrees calculations that require this. I have a set of data from bearings from an aircraft where I need to convert those bearings to normal degrees bearings. As...
  12. M

    Calculating lat/long with range bearing

    All, I have a latitude/longitude and I want to find another latitude/longitude given a range to the location and the bearing from the latitude and longitude I have. I have tried using the Haversine formula, which did not work for me because it is for ranges that are in hundreds of...
  13. phosgene

    Displacement of ball bearing using conservation of energy

    Homework Statement A large ball bearing is suspended as a pendulum. One end of the pendulum is held by the electromagnet (1) and the ball is initially held by magnet (2) at some height, h, above its lowest position. The ball is released from (2) and as the pendulum swings through the vertical...
  14. P

    Air bearing for vibrostend platform

    Hi all! There are actual task to specialists. I have a problem. There is a platform. It made ​​of aluminum 300x400x10 mm and must moving strictly along one axis (for example X axle). The Y and Z axis of this platform should be very tightly held. We can not allow fluctuations of Y and Z...
  15. J

    Finding a Bearing for 50Bar Pressure in Oven Heat

    Hello, I am trying to find a bearing that will allow a shaft to pass into a loop with 50bar of pressure. The basic schematic is the idea since this thread: The water jacket protects the bearing from high temperature as the oven will heat up the fluid to a maximum of 450dC. I assume I will...
  16. M

    The Physics of Motion: Steel Ball Bearing on a Frictionless Surface

    If a 1 inch diameter steel ball bearing is at rest on a frictionless surface, what slope would be required of the surface for the ball bearing to initiate movement?
  17. A

    Fabricating With Bearing Question

    have to get up to speed on bearings building one off hubs using timken type bearings what's the correct name for the bore the backside of bearing goes into? same question for shoulder that keeps bearing from going into tube?
  18. R

    Upside down motor mount and Thrust bearing

    I wanted to use a disco ball motor to rotate an object weighing approximately 125lbs. The motor was rated for 25 lbs. Motors rated for higher weights had much higher costs, beyond what would be practical. It was suggested that using an arrangment like the one described in the attached pdf would...
  19. B

    Max. Permissible Bearing Preload for Angular Contact Bearings

    For my Project, two angular contact bearings are selected to support a spindle. However, I would like to preload both the bearings considering thermla expansion.. I would like to know the max. permissible preloading limits for the bearings. Could someone suggest me some good material or links to...
  20. F

    Choosing a bearing design for a roller.

    Alright, the application I will be using this roller is for assisting the unloading of cargo that isn't exactly fun by hand. The load these will be handling will be around 250 - 300lbs give or take during use at the most. My first thought was to use a tapered roller bearing, but, it would...
  21. A

    Connecting motor shaft to thrust bearing

    Hi there - I built a small electronic turntable with the following components: 1- Arduino 2- Sparkfun easy stepper driver 3- Stepper motor 4- Servocity set screw hub. 5- Thrust bearing from mcmaster-carr (square turntable, found here http://www.mcmaster.com/#swivel-plates/=eltxix) 6-...
  22. C

    How can I design a reliable slewing bearing for a VAWT yaw control system?

    I'm building a yaw control system for one of the universitys VAWT turbines. I need to design a slewing bearing which can reliably support radial, axial and tilting moments. I have absolutely no idea how to do this or even where to start. Could you please give me some advice as to go about...
  23. G

    Roller Bearing Specs: Load Capacity, Size, Friction Coefficient

    I am looking for a website or even some good ideas about the capacity of roller bearings I am especially interested in knowledge of 1. size (diameter) - larger the better 2. load capacity - large load in particular 3. known coefficient of fricition ( some tables say ~ .0012? or even...
  24. M

    Journal Bearing Steel Epoxy Repair?

    A camshaft journal bearing was damaged due to oil starvation. after camshaft is replaced. Using a proper epoxy resin to fill in the damaged / pitted journal surface then honing the journal back to the standard size. After that adding groves or small pits that would work as oil pockets...
  25. A

    Single Row, Deep Groove Ball Bearing: Constant Rotation Speeds and Wear

    My regards to all I am current doing my thesis for my masters. I have completed my work, but i seemed to have taken one thing for granted. lets assume there is a Single Row, Deep Groove Ball Bearing. Here what i want to know is CAN the outer ring and inner ring move at two different...
  26. Femme_physics

    What do radial bearing and pressure bearing mean in physics?

    What do "radial bearing" and "pressure bearing" mean in physics? (This is NOT a homework question) I am told that this board is supported by two bearings: Radial bearing C, and pressure bearing O. Then they write something I can't even begin to translate, it looks as though it's written in...
  27. E

    How Can You Source Ball Bearings of Different Diameters but Identical Mass?

    Hello All, I have been giving a practical assignment to calculate how terminal velocity changes as the diamter of ball bears increase. I have chosed to use stokes law http://en.wikipedia.org/wiki/Stokes%27_law to assist me with the prac. I required different sized ball bearing but must...
  28. S

    Load on a journal bearing in a vertical shaft

    i have to design a journal bearing for a vertical motor shaft. what loads act on these bearings? since the shaft is axial, are they any loads that act on the bearing. here i am talking about journal/plain bearing, not the thrust bearing which supports the vertical load. what type of failure we...
  29. M

    Heat Transfer from Solid Shaft to Bearing

    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...
  30. F

    Minimum strength of pipe for load bearing

    Hello, I am working on a project and I came across a question that is a little beyond my skill set. I am designing a support for a roof, and I have the force into the post, the length of the post and I need to determine what pipe I need, size, schedule diamter, etc. How do I go about this...
  31. K

    Free body diagram, bearing forces

    Hi, I wish to work out the reaction forces on the following diagram: [PLAIN]http://img227.imageshack.us/img227/7055/imag0211b.jpg The circle is a gear with tangential force acting at Ft and radial force acting at Fr. A and B are bearings that take the Ft and Fr forces. I have...
  32. H

    How can I securely fix a bearing inside a pipe without permanent installation?

    hello, i want to fix a bearing inside a pipe but not "permanently" so i can remove it and change it whenever i need. please if anyone has a method for fixing it, share it with me ?
  33. P

    Find Distance and Bearing from City A to C | Plane Navigation Problem

    Problem Distance: From city A to city B, a plane flies 650 miles at a bearing of N 48° E. From city B to city C, the plane flies 810 miles at a bearing of S 65° E. Find the distance from A to C and the bearing from A to C. Work so far So far I've gotten the distance from A to C already...
  34. Y

    Bearing Length and Shaft Diameter Calculation

    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...
  35. O

    Effect of an offset load on a bearing - (static calc)

    I was positive this is a simple uni style question, but I can't seem to work it out. I have a pneumatic cylinder that has an allowable 10N of side load acting on the end of the piston rod, at an extension of 0.1m. Now Let's say the cylinder is generating a force of P=200N. And the load it is...
  36. C

    Ball bearing launched from point

    Homework Statement In my physics class we shot a ball bearing horizontally 85.4cm off the ground and we recorded the distance at which it landed. How can I find the initial velocity? The average distance traveled was 250.24 cm. What if I was not provided I distance, how could I calculate...
  37. W

    Find the magnitude of a force supported by a bearing

    Homework Statement Find the magnitude of the force supported by bearing B if the weight of the assemble is supported entirely by A and there is a 120 Nm couple to the shaft. The plate has mass of 15 kg. The cable from C to D prevents the plate from turning...
  38. A

    Impossible Bearing and Triangle word problem.

    Homework Statement Radio direction finders are set up at points A and B, 8.68 mi apart on an east-west line. From A it is found that the bearing of a signal from a transmitter is N54.3*E, while from B it is N35.7*W. Find the distance from B, to the nearest hundredth of a mile. A person...
  39. V

    What Is the Mechanical Device That Uses a Ball Bearing on a Track?

    Does anyone know the name for a mechanical device where a ball bearing is made to go down a ramp, through loops, up and down pulleys etc, while moving on a metal rail? My first thought was a Rube Goldberg device, but I don't think that's it. Richard
  40. F

    LRFD phi for overturning, sliding, and soil bearing?

    Does anyone know the phi factors for overturning, sliding, and soil bearing in a small reinforced footing? If you could site the precise source too, that'd be great. I don't have access to many up to date specs and codes :/
  41. S

    Finding Bearing and Distance using Calculator?

    ∆Eastings + 262.575 ∆Northings + 929.573 Bearing = not an idea how to work it out Distance = Pol(∆Northing,∆Easting)= displays distance Please help, thanks!
  42. S

    Calculating Bearing Friction Torque in Winding Drum System

    I am familiar with the basics concept of kinetic friction (such as pushing a box on a surface), but how do you calculate the friction torque caused by a bearing for example? In my college assignment, I have been told the bearings in a winding drum have a coefficient of friction of 0.04...
  43. M

    Bearing strength of square tubing

    I'm designing a single axis PV solar tracker. Square tubing will be the structural member of the axis. U-bolted cross members will support the solar panels. Each section of square tubing will be 10'-0" long between supports. Four cross members and four solar panels will attach to each 10'...
  44. G

    What is the bearing of a ship sailing 120 km on a heading of 070 degrees?

    I have to answer a question which states: "a ship sails on a bearing of 070 degrees for 120 km. Draw a diagram to show this". Does this mean 70 degrees from the horizontal, so that I would measure 070 degrees by placing my protractor down flat and level in front of me?
  45. M

    Let's Talk Bearing Spring Rings

    OK, in bearings (particularly roller) often times there will be a "spring ring" around it. The ring acts to soften the support structure for the bearing. Ring is typically a thin ring with "pads" on both the inside and outside. They are staggered such to put the thin ring into bending when load...
  46. A

    Possible Causes of Roller Bearing Overheating and Failure in Vertical Pumps

    Dear all, I'd like to ask what are the causes for a roller bearing in a vertical pump to overheat and burn as we have got this incident in our plant and am trying to find out what can cause such a thing. Pump details: 1. Sulzer Waste Water Pump (Model No.: VCM 4X10A 2. Pump has been...
  47. B

    Pumps having hot roller bearing

    I am working on a new 45kW centrifugal water pump, which is >70C at the roller bearing pedestal. I wonder what' s causing such high temperature. The vibration measured at the bearing pedestal is indeed very small. The pump seems to be well balanced and lubricated.
  48. A

    Understanding Bearing Tolerance: Diameter 55 k5

    Hi All On the following picture http://img.photobucket.com/albums/v309/Andreii/ujj.jpg" , I have the tolerance Diameter 55 k5. Of course there is a big difference between k5 and K5 but that has nothing to do with my post. I would like to know why is exsactly this tolerance there? Why not, for...
  49. B

    Bearing Loads in a Belt Drive System

    I have a question regarding the bearing loads on a set of rotating shaft systems. The two systems are belt driven, each with one driver and one driven pulley. Belt tension is higher in system one than in system two. Rotational speed is higher in system two than in system one. The pulley...
  50. J

    Acceleration of ball bearing near solenoid

    ok so I am making a few solenoids for a little project I am doing at home, I am making a mass driver. i thought it would look good on my uni application, and it would be fun to build. anyway, I am using the equation http://img229.imageshack.us/img229/5841/equation1solenoidimg.png to find the...
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