Bearing Lubrication And Seals

Question 1

Bearings can be lubricated with either ____ or ____.

Answer 1

Oil or grease

Question 2

2 lubricants suitable for severe conditions:

Answer 2

1) Synthetic
2) Dry

Question 3

Excessive viscosity may cause the bearings to ____.

Answer 3

Skid

Question 4

2 things that happen when skidding occurs:

Answer 4

1) Overheating
2) Raceway damage

Question 5

Insufficient viscosity may lead to ____ ____.

Answer 5

Bearing seizure

Question 6

2 classes of lubricating oils:

Answer 6

1) Petroleum
2) Synthetic

Question 7

3 characteristics of petroleum

Answer 7

1) Low speed
2) Low cost
3) Low heat

Question 8

characteristics of petroleum based lubrication:

Answer 8

1) Low heat
2) Low cost
3) Low to moderate speed

Question 9

3 characteristics of synthetic lubrication:

Answer 9

1) High speed
2) High temp
3) High cost

Question 10

2 characteristics of dry lubrication:

Answer 10

1) Low speed
2) High temperature

Question 11

Group of bearing types that provide low friction motion in one dimension

Answer 11

Linear bearings

Question 12

Linear bearings fixed support component is also called?

Answer 12

1) Rail
2) Way
3) Guide

Question 13

Keeps lubricants in and contaminants out

Answer 13

Seals

Question 14

2 types of seals:

Answer 14

1) Contact
2) Non-contact

Question 15

Keeps contact with both rotating and stationary components to prevent Lubrication loss?

Answer 15

Contact seals

Question 16

Which seal struggles with speed?

Answer 16

Contact seal

Question 17

Provides a clearance between rotating and stationary parts

Answer 17

Non contract seals

Question 18

2 advantages of Non-contact seals:

Answer 18

1) Eliminates rubbing and heat buildup
2) Suitable for high speed

Question 19

Reduces friction in applications where machined bearing seats in the equipment frame are undesirable or impractical?

Answer 19

Mounted bearings

Question 20

4 mounted bearing types:

Answer 20

1) Pillow block
2) Flanged cartridge
3) Cylindrical cartridge
4) Take up

Question 21

2 reasons to use oil instead of grease?

Answer 21

1) High speed
2) High temperature

Question 22

Mounted vertically where shaft passes through machine at right angle?

Answer 22

Flanged cartridge block

Question 23

3 characteristics that describe a take-up unit:

Answer 23

1) Adjust center distance between shafts like on conveyer
2) Adjusts horizontal and vertical
3) Top and side mounting

Question 24

Big advantage of Rod end bearings?

Answer 24

Accommodates wide range of angular Misalignment

Question 25

What type of configuration are cam-type and load following bearings and what type of rotation do they accommodate?

Answer 25

Shaft & head configuration
Symmetrical & elliptical motion