6.8 Bearings

Question 1

Pivot journals

Answer 1

accept force in the longitudinal direction and are called pivot or axial bearing

Question 2

Supporting journal

Answer 2

accept force at a right angle and are called journal bearing or roller bearing

Question 3

Two types of load are

Answer 3

radial and thrust.

Question 4

Plain bearings are___ and are used where loads are___ and motion is_____

Answer 4

sliding
light
continuous

Question 5

Sliding bearings are made out of

Answer 5

cast iron
Dry powdered iron
white metal

Question 6

Sliding bearings are resistant to ____ and operate with____

Answer 6

push forces

little noise

Question 7

Disadvantage of sliding bearing is _____

Answer 7

high starting resistance and continuous maintenance

Question 8

5 types of bearing

Answer 8

tapered
needle 
spherical 
cylindrical 
ball

Question 9

Anti-friction bearing consist of?

Answer 9

inner and outer raceway

Question 10

The inner and outer raceway is manufactured from

Answer 10

chromium steel and chromium nickel steel

Question 11

Bearing cages are made out of?

Answer 11

steel or brass plate

Question 12

Ball bearings have

Answer 12

low starting resistance and have high rotation speed.

Question 13

Ball-bearing transfer pressure

Answer 13

to one spot

Question 14

Roller bearing transfer pressure

Answer 14

along a line.

Question 15

What bearing can be installed between the shaft and bearing housing

Answer 15

pin roller bearings

Question 16

ball bearings have___ contact between the balls and races

Answer 16

point

Question 17

roller bearings have___ contact between the balls and races

Answer 17

line

Question 18

What type of loading conditions can lead to failure

Answer 18

axial and shocks

Question 19

contaminants get stuck in the bearing race ___ and use ___ to clean it

Answer 19

groove and lubricant

Question 20

which bearing is used at non locating positions?

Answer 20

cylindrical roller bearing

Question 21

Cylindrical roller bearing allows what type of displacement

Answer 21

axial displacement

Question 22

Needle roller bearing has___? and is good where ___ is limited

Answer 22

high radial load capacity and radial space is limited

Question 23

Self-aligning allows

Answer 23

angular displacements

Question 24

If risk of misalignment

Answer 24

use spherical roller bearing

Question 25

Dry-powdered bearing metals contain fluid or solid lubricants in their___? which provides___ when heated

Answer 25

pores and lubrication

Question 26

An even film of_____ must be maintained in the journal bearing. If the _____ is missing, the journal will cut into the bearing.

Answer 26

continuous lubrication and shim

Question 27

Synthetic bearings are often lubricated with_____ and can retain____

Answer 27

water and heat

Question 28

to avoid insufficient oil use

Answer 28

grease pump

Question 29

force the grease through

Answer 29

large end to small end

Question 30

three common causes of bearing defects

Answer 30

excessive loads, iverheating and reverse loads

Question 31

Bearing corrosion results____? and what color

Answer 31

corrosive fluids. red and brown area

Question 32

lubricant failure are discolored ___

Answer 32

blue and brown