Bearing Presentation for beginnersvv.ppt

bearing selection

1. Ahmed Higazy

2. Classification of Bearings
Rolling
Bearings
Deep groove ball bearingDeep groove ball bearing
Self Aligning ball bearingSelf Aligning ball bearing
Angular contact ball bearingAngular contact ball bearing
Track runner bearingTrack runner bearing
Cylindrical roller bearingCylindrical roller bearing
Needle roller bearingNeedle roller bearing
Spherical roller bearingSpherical roller bearing
Taper roller bearingTaper roller bearing
Radial Thrust
Thrust ball bearingThrust ball bearing
Cylindrical roller thrust bearingCylindrical roller thrust bearing
Needle roller thrust bearingNeedle roller thrust bearing
Spherical roller thrust bearingSpherical roller thrust bearing

3. Spherical
Plain Bearing
Radial BearingRadial Bearing
Thrust BearingThrust Bearing
Rod EndsRod Ends
Classification of Bearings

4. Bearing Standard Components
1- The Inner Ring
2- The Outer Ring
3- The Rolling Element
4- The Cage “Retainer”

5. Mounting and Dismounting Of Bearings

6. Bearing Cold Mounting
Hammer
Long
Tube with
flat ends
Used for Small and
medium size
bearings.
cause forces to be
transmitted through
the rolling elements.
Forces must be
distributed on the
outer and inner
rings.

7. Bearing Hot Mounting
Bearing
Induction
Heating
Unit
Heat mounting
Methods

Oil baths
Induction heating.
a) Treating one part. 
b) Cooling one part. 
c) Simultaneously
heating one part and
cooling the other part. 

8. Hydraulic Mounting
Hydraulic
Press
Bearing

9. Mounting and Dismounting Of Bearings

10. Mechanical Dismounting
Tools Used

11. Hydraulic Dismounting
Tools Used

12. Hot Dismounting
Tools Used

13. Oil Injection
Tools Used

14. Running Traces And Applied Load
Typical running traces of deep groove ball bearing

15. Running Traces And Applied Load
Typical running traces on roller bearing

16. Failure Analysis
Flaking
Occurs when
small pieces of
bearing
material are
split off from
the smooth
surface of the
raceway or
rolling elements
due to rolling
fatigue.

17. Failure Analysis
Flaking
Occurs when
small pieces of
bearing
material are
split off from
the smooth
surface of the
raceway or
rolling elements
due to rolling
fatigue.

18. Failure Analysis
Countermeasure
•Reconfirm bearing
application and load
conditions.
•Improve mounting
method.
•Improve sealing
mechanism.
•Use lubrication with
proper viscosity.
•Check bearing internal
clearance.

19. Failure Analysis
Peeling
Dull or cloudy
spots appear on
surface along
with light wear,
small particles
fall off and
minor flaking
occurs widely.

20. Failure Analysis
Countermeasure
•Select proper
lubrication.
•Improve sealing
mechanism.
•Improve surface finish of
rolling mating parts.

21. Failure Analysis
Scoring
Surface damage
due to
accumulated
small seizures
caused by
sliding under
improper
lubrication or
under sever
operating
condition.

22. Failure Analysis
Scoring
Surface damage
due to
accumulated
small seizures
caused by
sliding under
improper
lubrication or
under sever
operating
condition.

23. Failure Analysis
Countermeasure
•Check size of the load.
•Adjust the preload.
•Improve lubrication.

24. Failure Analysis
Smearing
Surface damage
which occurs
from a
collection of
small seizers
between bearing
components
caused by oil
film rupture
and/or sliding.

25. Failure Analysis
Smearing
Surface damage
which occurs
from a
collection of
small seizers
between bearing
components
caused by oil
film rupture
and/or sliding.

26. Failure Analysis
Countermeasure
•Improve bearing
clearance.
•Improve lubrication
method.
•Improve sealing
mechanism.

27. Failure Analysis
Fracture
Refers to small
pieces which
were broken off
due to excessive
load or shock
load acting
locally on a part
of the roller
corner or rib of
a raceway ring.

28. Failure Analysis
Countermeasure
•Improve mounting
method.
•Improve handling
methods.

29. Failure Analysis
Cracks
Cracks in the
raceway ring
and rolling
elements.
Continued use
under this
condition leads
to larger cracks
or fracture.

30. Failure Analysis
Cracks
Cracks in the
raceway ring
and rolling
elements.
Continued use
under this
condition leads
to larger cracks
or fracture.

31. Failure Analysis
Countermeasure
•Correct the
interference.
•Check the load
conditions.
•Improve mounting
method.
•Use appropriate shaft
shape.

32. Failure Analysis
Cage
Damage
Includes cage
deformation,
fracture, and
wear

33. Failure Analysis
Cage
Damage
Includes cage
deformation,
fracture, and
wear

34. Failure Analysis
Countermeasure
•Check mounting
method.
•Check
temperature ,rotation ,a
nd load conditions.
•Reduce vibration.
•Select lubrication
method and lubricate.

35. Failure Analysis
Pitting
The pitting
surface has a
dull luster
which appears
on the rolling
element surface
or raceway
surface.

36. Failure Analysis
Countermeasure
•Improve the sealing
mechanism.
•Filter the lubrication
oil.
•Use a proper lubricant.

37. Failure Analysis
Wear
Surface
deterioration
due to sliding
friction at the
surface of the
raceway, rolling
elements, roller
end faces, rib
face, cage
pockets.

38. Failure Analysis
Wear
Surface
deterioration
due to sliding
friction at the
surface of the
raceway, rolling
elements, roller
end faces, rib
face, cage
pockets.

39. Failure Analysis
Countermeasure
•Improve sealing
mechanism.
•Clean the housing.
•Filter lubrication oil.
•Prevent misalignment.

40. Failure Analysis
Fretting
Wear occurs due
to repeated
sliding between
the two
surfaces.

41. Failure Analysis
Fretting
Wear occurs due
to repeated
sliding between
the two
surfaces.

42. Failure Analysis
Countermeasure
•Use proper lubricant.
•Check the interface fit.
•Apply a film of
lubricant to the fitting
surface.

43. Failure Analysis
Creep
Relative slipping
occurs at the
fitting surfaces
and thereby
creates a
clearance at the
fitting surface.

44. Failure Analysis
Countermeasure
•Check the interference
and prevent rotation.
•Correct sleeve
tightening.
•Apply a film of
lubricant to the fitting
surface.

45. Failure Analysis
Seizure
When sudden
overheating
occurs during
rotation, the
bearing
becomes
discolored.

46. Failure Analysis
Seizure
When sudden
overheating
occurs during
rotation, the
bearing
becomes
discolored.

47. Failure Analysis
Countermeasure
•Study the lubricant and
lubricant method.
•Improve the sealing
mechanism.
•Improve the mounting
method.

48. Failure Analysis
Electrical
corrosion
When electric
current passes
through a
bearing, arcing
and burning
occur through
the thin oil film
at points of
contact between
the race and
rolling
elements.

49. Failure Analysis
Countermeasure
•Insulation of the
bearing.
•Design electric circuits
which prevent current
flow through the
bearing.

50. Failure Analysis
Rust and
Corrosion
Pits on the
surface of rings
and rolling
elements and
may occur at the
rolling element
pitch on the
rings or over the
entire bearing
surfaces.

51. Failure Analysis
Countermeasure
•Improve sealing
mechanism.
•Study the lubrication
method.
•Improve storage
methods.
•Improve handling
method.

52. Failure Analysis
Mounting
Flaws
Straight line
scratches on
surface of
raceways or
rolling elements
caused during
mounting or
dismounting of
bearing.

53. Failure Analysis
Countermeasure
•Use appropriate tool for
mounting.
•Avoid a shock load by
use of a press machine.
•Center the relative
mating parts during
mounting.

54. Failure Analysis
Discoloratio
n
Discoloration of
cage ,rolling
elements, and
raceway ring
occurs due to a
reaction with
lubrication and
high
temperature.

55. Failure Analysis
Countermeasure
•Improve the lubrication
method.

56. Failure Analysis
Flaking
Flaking in swash
plate pump
bearings and
shaft due to
excessive load
and low
lubrication
causes the
bearing to
collapse and
flaking the shaft.

57. Failure Analysis
Flaking
Flaking in swash
plate pump
bearings and
shaft due to
excessive load
and low
lubrication
causes the
bearing to
collapse and
flaking the shaft.

58. Failure Analysis
Flaking
Flaking in swash
plate pump
bearings and
shaft due to
excessive load
and low
lubrication
causes the
bearing to
collapse and
flaking the shaft.

59. Failure Analysis
Flaking
Flaking in swash
plate pump
bearings and
shaft due to
excessive load
and low
lubrication
causes the
bearing to
collapse and
flaking the shaft.

60. Failure Analysis
Peeling
Small flaking in
closure valve
Bearing in Lime
Plant due to
misalignment
and insufficient
Fit or bad
mounting.

61. Failure Analysis
Peeling
Small flaking in
closure valve
Bearing in Lime
Plant due to
misalignment
and insufficient
Fit or bad
mounting.

62. Bearing Separator

63. Bearing Cold Mounting

64. Bearing Hot Mounting

65. Hydraulic Nut And Pump

66. Aluminum ring heater

67. Oil Injector