Lube

Question 1

What two things are bearings lubricated with?

Answer 1

Oil
Grease

Question 2

What do we use for severe applications?

Answer 2

Synthetic and dry lubricants

Question 3

Advantage of grease over oil?

Answer 3

Easy to contain in housing.

Question 4

Disadvantage of grease?

Answer 4

Low to moderate speeds

Question 5

Advantage of oil?

Answer 5

High speed high temperature applications
Removes heat from bearing

Question 6

What causes skidding?

Answer 6

Too high viscosity oil or grease

Question 7

What causes friction?

Answer 7

Too low viscosity oil or grease.

Question 8

Two types of lubricating oil?

Answer 8

Petroleum
Synthetic

Question 9

Advantage of petroleum?

Answer 9

Least expensive widely used

Question 10

Advantage and disadvantage of synthetic oil?

Answer 10

High temperature range 700 degrees and up. And high speeds.

More expensive

Question 11

What do we use dry lubricants for?

Answer 11

Low speed, extreme temperatures

Question 12

How much of the lowest rolling element in a housing must be submerged in lubricant?

Answer 12

One third to one half of the lowest rolling element in the housing.

Question 13

What are linear bearings?

Answer 13

Move on one dimension with low friction.

Question 14

On linear bearings what is the support component called?

Answer 14

Rail, way, or guide.

Question 15

What are the two types of seals?

Answer 15

Contact and non contact.

Question 16

What are seals used for?

Answer 16

Keep contaminates out and lubricant in.

Question 17

Two types of seals?

Answer 17

Shielded or seals.

Question 18

Advantage of non contact seals?

Answer 18

Can operate at very high speeds.

Question 19

Advantage of contact seals?

Answer 19

Prevents loss of lubricants.

Question 20

What causes more bearing failure then metal fatigue?

Answer 20

Poor lubrication
Contamination
Misalignment

Question 21

What are the mounted bearing types?

Answer 21

Pillow block
Flanged cartridges
Cylindrical cartilages
Take up bearings

Question 22

What are piloted flange cartridges used for?

Answer 22

Better mounting accuracy and more support

Question 23

What is a take up bearing?

Answer 23

Adjust center distances between shafts or belt tightening

Question 24

What are the two locking types form the shaft to the collar?

Answer 24

Set screws
Cam lock collar

Question 25

What are rod end bearings used for?

Answer 25

Handle misalignment has no rolling elements.

Question 26

Can cam type bearings have plain or rolling element bearings or just needle bearings?

Answer 26

Any plain or rolling element bearings.