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Final > Bearing And Shaft > Flashcards

Bearing And Shaft Flashcards

1
Q

To measure running clearances use what

A

A feeler gauge

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2
Q

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

A

Charts and tables

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3
Q

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

A

Conformability

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4
Q

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

A

Thermal conductivity

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5
Q

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

A

Preheating

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6
Q

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

A

White lead

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7
Q

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

A

Circulate lube

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8
Q

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

A

Flush out old lubricants

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9
Q

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

A

Higher than normal heat

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10
Q

Screeching this usually signals that blank or that lubrication is inadequate

A

Clearances are too tight

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11
Q

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

A

Wrap in oil resistant paper

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12
Q

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

A

Inner ring may distort

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13
Q

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

A

80%

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14
Q

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

A

Interference fit

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15
Q

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

A

4 inches or less

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16
Q

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

A

Light oil

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17
Q

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

A

Automatic oil mist

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18
Q

Do not use a blank torch to install a bearing

A

Gas operated

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19
Q

When tightening a locking nut use what kind of a tool

A

Spanner wrench

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20
Q

A bearing is driven up a split tapered adapter by

A

A heavy duty nut

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21
Q

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

A

200°F

22
Q

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

A

Arbor press

23
Q

To use the heat bring it to approximately what temperature

A

500°F

24
Q

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

A

Cylindrical roller

25
Q

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

A

Back the nut off several turns

26
Q

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

A

Mechanical puller

27
Q

Two important dimensions of a bearing puller are spread, and

A

Reach

28
Q

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

A

Impact or force, heat

29
Q

What will cause plane bearings to rust quickly

A

The use of steam or plain hot water to clean them

30
Q

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

A

Grease

31
Q

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

A

The contact seal

32
Q

These bearing designs which accommodate some internal misalignment are called

A

Spherical roller bearings

33
Q

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

A

No caller

34
Q

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

A

Take up

35
Q

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

A

Nominal to 0.001 in.

36
Q

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

A

Manufacturers provide charts

37
Q

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

A

Grease

38
Q

When you use Grease, the actual lubricant is

A

Mineral oil

39
Q

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

A

15 to 25°F

40
Q

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

A

160°F

41
Q

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

A

90%

42
Q

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

A

Squared off and thick

43
Q

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

A

Vertically, loads horizontally

44
Q

Standard blank support the screw

A

Ball bearings

45
Q

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

A

Ways

46
Q

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

A

Hot oil bath 225°F

47
Q

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

A

A thin film of oil

48
Q

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

A

A v-ring seal

49
Q

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

A

Silicone

50
Q

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

A

15 to 30°

Final (3 decks)

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