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