Bearings (Plain)

Question 1

Bearings are grouped into what 2 categories?

Answer 1

1) Plain
2) Rolling

Question 2

Bearings support both _____ and _____ in power transfer systems.

Answer 2

Motion and force

Question 3

Bearings have 3 types of motion

Answer 3

1) Rotary (Radial)
2) Linear (Back and forth)
3) Combined (Axial)

Question 4

What 3 factors determine bearing choice?

Answer 4

1) Speed
2) Load
3) Environmental conditions

Question 5

Speed is measured in ______

Answer 5

RPM’s

Question 6

Speed is ______

Answer 6

Velocity

Question 7

Speed x load = _____

Answer 7

PV

Question 8

Load = ______

Answer 8

Pressure

Question 9

PV stands for?

Answer 9

Pressure & velocity

Question 10

Speed and pressure are ________

Answer 10

Directly proportional

Question 11

Non-rolling bearings are _______

Answer 11

Plain bearings

Question 12

______ does not mean _______ in bearings

Answer 12

Simplicity & inferiority

Question 13

Takes up intermediary space

Answer 13

Bushing

Question 14

Fitting or fixture

Answer 14

Sleeve

Question 15

What is one distinct advantage to plain bearings?

Answer 15

Any motion of rotation is acceptable

Question 16

Plain bearings can accommodate what 4 ranges of motion?

Answer 16

1) Radial
2) Linear
3) Axial
4) Oscillating

Question 17

Several alloys all melted together to create a specific bearing material

Answer 17

Babbitt

Question 18

What is metal fused with powder to create a porous bearing impregnated with lubricating oil?

Answer 18

Sintered iron

Question 19

What are the 3 advantages to metallic plain bearings?

Answer 19

1) High-low capacity
2) Temperature Range
3) Cost

Question 20

Name 3 types of metal metallic plain bearings can be made out of

Answer 20

1) Bronze
2) Copper
3) Aluminum
4) silver Babbitt
5) Sintered iron

Question 21

Non- metallic plain bearings handle _____ & _____ very well

Answer 21

Shock and vibration

Question 22

Non-metallic plain bearings do not handle _____ very well

Answer 22

Load

Question 23

What are the 4 modes of lubrication?

Answer 23

1) Boundary
2) Mixed film
3) Full film
4) Hydrostatic

Question 24

4 ways to upgrade the modes of lubrication are?

Answer 24

1) Improve shaft finish
2) Increase speed
3) Increase Viscosity
4) Decrease load

Question 25

The depth of the grease groove is ____ of the wall thickness?

Answer 25

1/4

Question 26

Self lubricating is an ______ part of the actual bearing _____

Answer 26

Inherent & structure

Question 27

What are 2 types of self-lubricating bearings?

Answer 27

1) Solid liners 2) Plugs & grooves

Question 28

Plastic bearings are _______ and ______ compared to most other forms of plain or rolling bearings?

Answer 28

Lightweight & cost-effective

Question 29

Low temperature bearings can operate effectively at temperatures reaching?

Answer 29

-200° F

Question 30

Modern extreme temperature bearings can accommodate temperatures as high as?

Answer 30

900° F