Bearing And Shaft

Question 1

To measure running clearances use what

Answer 1

A feeler gauge

Question 2

The best way to determine the correct running clearance when installing a bearing is to use established blank and blank that exist for this purpose

Answer 2

Charts and tables

Question 3

The ability of the material to flow slightly when loaded is called

Answer 3

Conformability

Question 4

The materials ability to dissipate any excessive heat generated during operation is called

Answer 4

Thermal conductivity

Question 5

When dealing with bearing shells doing what with the shell should remove any remaining moisture

Answer 5

Preheating

Question 6

Coding the mandrel with blank blank will also prevent the Babbitt from clinging

Answer 6

White lead

Question 7

Typical groove patterns used for introducing lubricants into a plane bearing are there to do what

Answer 7

Circulate lube

Question 8

The purging action of the newly applied grease tends to blank from the bearing surfaces

Answer 8

Flush out old lubricants

Question 9

Excessive wiping of the liner material and discoloration are signs that usually accompanied what in the operating area

Answer 9

Higher than normal heat

Question 10

Screeching this usually signals that blank or that lubrication is inadequate

Answer 10

Clearances are too tight

Question 11

If you must leave the job for a short time or overnight make sure you cover the bearing with a lint free cloth or that you re-wrap it in the greaseproof paper in which it was packaged

Answer 11

Wrap in oil resistant paper

Question 12

If the shoulder is too low, the bearings blank during mounting or when carrying a thrust load

Answer 12

Inner ring may distort

Question 13

The amount of bluing transferred to the shaft should be how much to be considered satisfactory

Answer 13

80%

Question 14

A loose inner ring to shaft fit will loosen even more during operation the type of fit that is needed is called

Answer 14

Interference fit

Question 15

Using an arbor press and impact for small bearings with an OD of what may be forced into position on a shaft either by using an auto press or by impact

Answer 15

4 inches or less

Question 16

Before employing either the arbor press or impact technique make sure to lubricate the bearing bore and the shaft with what

Answer 16

Light oil

Question 17

Using this type of system to lubricate a bearing during operation it should be cleaned before installation

Answer 17

Automatic oil mist

Question 18

Do not use a blank torch to install a bearing

Answer 18

Gas operated

Question 19

When tightening a locking nut use what kind of a tool

Answer 19

Spanner wrench

Question 20

A bearing is driven up a split tapered adapter by

Answer 20

A heavy duty nut

Question 21

A bearing typically operate within a certain temperature range. Temperatures above blank indicate serious problems

Answer 21

200°F

Question 22

There are two acceptable ways to remove bearings that are approximately 4 inches in diameter or smaller. One way is to use what

Answer 22

Arbor press

Question 23

To use the heat bring it to approximately what temperature

Answer 23

500°F

Question 24

The aluminum heating ring is designed for mounting and dismounting inner rings of blank blank bearings

Answer 24

Cylindrical roller

Question 25

You should not completely remove the locking nut before applying force to a taper mounted bearing. Instead

Answer 25

Back the nut off several turns

Question 26

You can use a puller attachment commonly called a splitter to grip the back of a bearing where there is not enough space for the blank

Answer 26

Mechanical puller

Question 27

Two important dimensions of a bearing puller are spread, and

Answer 27

Reach

Question 28

The two main methods of removing bearings rely on the use of blank and the use of blank

Answer 28

Impact or force, heat

Question 29

What will cause plane bearings to rust quickly

Answer 29

The use of steam or plain hot water to clean them

Question 30

If newly cleaned and inspected bearings or not to be reinstalled lubricated immediately, they must be protected. Using your hand, press good, clean bearing blank into the rollers

Answer 30

Grease

Question 31

Blank is the most positive seal. It should be used in the applications were dirt, water, and other contaminants are present in the area where the pillow block is operating

Answer 31

The contact seal

Question 32

These bearing designs which accommodate some internal misalignment are called

Answer 32

Spherical roller bearings

Question 33

A third holding design also uses threaded set screws installed through the inner ring to the shaft, but blank is used this method is called the grub screw method

Answer 33

No caller

Question 34

Premounted bearings used to adjust tension in belt conveyor’s are called blank bearings

Answer 34

Take up

Question 35

What is the correct shaft tolerance range for shafts from 2 to 4 inches in diameter

Answer 35

Nominal to 0.001 in.

Question 36

Bearing blank listing the correct amount of takeout for various sizes of bearings. Subtracting the takeout value from the original unmounted clearance unmounted clearance

Answer 36

Manufacturers provide charts

Question 37

Another advantage of using blank is that it improves the effectiveness of the labyrinth seal

Answer 37

Grease

Question 38

When you use Grease, the actual lubricant is

Answer 38

Mineral oil

Question 39

The temperature at the bearing is from blank to blank higher than the temperature measured at the housing

Answer 39

15 to 25°F

Question 40

As a rule, the interval between lubrications is cut in half for every 27° increase in temperature above

Answer 40

160°F

Question 41

The rolling contact action of the ball bearing screw is blank free of friction or efficient

Answer 41

90%

Question 42

The threads of an acme screw are blank for carrying heavy loads

Answer 42

Squared off and thick

Question 43

Ball bearing screws are used either to raise and lower loads blank or to move and position blank

Answer 43

Vertically, loads horizontally

Question 44

Standard blank support the screw

Answer 44

Ball bearings

Question 45

In a ball bearing screw the load rides on machined surface is called

Answer 45

Ways

Question 46

When preparing for installation of a bearing screw carefully lower them into blank to expand the inner ring

Answer 46

Hot oil bath 225°F

Question 47

In contacts seals, blank between the radio lip and the surface of the shaft forms the actual seal

Answer 47

A thin film of oil

Question 48

What is effective in rotating shaft applications where such contaminants as water, dust, dirt, coal, ore or mud are present in great quantities

Answer 48

A v-ring seal

Question 49

Seals made of blank operate favorably at temperatures as low as -325°F

Answer 49

Silicone

Question 50

For a lip seal the end of the shaft should be chamfered at an angle of

Answer 50

15 to 30°