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What are the 3 most common types of bearings?
Plain, Anti friction and elastomeric
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Name 2 types of bearing loads?
Radial, and thrust
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which way is a radial load relative to the shaft running through the shaft?
moves perpendicular
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which way is a thrust load?
due to axial movement on the shaft
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Name 4 advantages of Plain bearings?
- little space,
- low cost
- quite operation
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Disadvantage of plain bearings?
- High friction
- requires contionious lubercation
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What are babbit bearings most commonly used for?
Crackshafts
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which type of bearing hold luberication the best?
sintered metal bearing
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Name 3 factors that determine the load carrying capacity of a bearing?
- Size of the bearing
- # of rolling elements
- the types of races
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Name 5 types of antifriction bearings?
- tapered rollers
- needle rollers
- ball
- spherical rollers
- cylindrical rollers
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what are some advantages to antifriction bearings/
- low friction
- can be packed to reduce frequency of luberication
- versatile because of many designs
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Name some disadvantages to anti friction bearings?
- Requires more space than plain bearings
- Noiser
- higher cost
- less rigid than plain bearings
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What are the 4 basic loads of ball bearings ?
- Radial
- radial thrust load
- self aligning, radial load
- thrust load
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What are the primary functions of bearings?
- Support moving parts
- Reduce friction
- Reduce ware
- Provides replacable wear surfaces
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What bearings support heavy loads perpendicular to the shaft?
Roller Bearings
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Define face to face
back to back
face to back
- -inner race of thrust faces contact
- -deep shoulder takes thrust
- -installed in tandem
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How do you install a bearing on a shaft?
apply pressure to the inner race
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Name 5 types of defects on bearings
- Brinell
- False Brinelling
- pitting
- Smearing
- Corrosion
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how do you install a bearing on the inside diameter?
Apply pressure on the outside race
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How do you install bearings in a pinch fit application?
Heat housing and chill the bearing
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How can you pre-heat a housing?
Induction, electric heaters, oil bath, oven (no open flame)
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How are bearings held in place?
Roll staking
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Which bearing can accept radial, axial and torsional loads?
Elastromeric
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Advantages of Elastromeric bearings?
- No lube
- No dissambely required on inspection
- Cannot sieze
- no brinelling, pitting, galling
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What can cause corrosion in elastromeric bearings?
oil
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Name 4 types of damage that can occour to elastromeric bearings?
- heat
- fatigue
- oil contamination
- Forign Damage
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Name 4 types of Dynamic seals?
- Radial Lip seal
- Clearence Seals
- Face Seals
- Ring Seals
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Name 3 types of static seals?
- Non Metallic gaskets
- Metallic Gaskets
- Performed Packing
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Which seal is installed in high heat applications?
labyrinth
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Name the Dynamic Seals?
- O-Ring
- Labyrinth
- Double Lip
- piston Ring
- Carbon Face
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Name the Static Seals?
- Crushed washer
- Cheveron
- Boss O-Ring
- Carbon Face
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