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Mexh Sys B70 > Chapter 5- Bearings > Flashcards

Chapter 5- Bearings Flashcards

1
Q

Define radial loads

A

Load applied perpendicular to shaft

Shaft going through a hole in a roller bearing

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2
Q

Thrust(axial loads)

A

Loads applied parallel to acid of shaft

Loads applied to face of bearing

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3
Q

Combination loads

A

Both radial and axial load

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4
Q

Difference between a plain bearing and a rolling element beating

A

Plain bearing is any bearing using a sliding action

Roller element used roller friction

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5
Q

Specific differences between class 1 class 2 and class 3 plain bearings

A

Class 1-lubricated from outside source

Class 2-internal lubrication

Class 3-graphite or Teflon that require no lubrication

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6
Q

What type of bearing is also called an anti friction bearing

A

Rolling element bearing

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7
Q

List three basic types of rolling element bearings

A

1 Ball bearings

  1. Roller bearings
  2. Needle bearings
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8
Q

Difference between hydrostatic and hydrodynamic bearing lubrication

A

Hydrostatic-uses an outside pressure source to keep continuous stream

Hydrodynamic-uses coating action of rotation of shaft

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9
Q

What is a “sealed” bearing and why is this desirable

A

Sealed bearings

  1. keep contaminants out
  2. keep lubrication In
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10
Q

What is the advantage of a single row angular contact ball bearing

A

Can accommodate 300% more axial load

An ivy take axial loads in one direction

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11
Q

Can a single row angular contact ball bearing be installed in either direction

A

NO

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12
Q

What are the two types of thrust ball bearings and what is the difference

A
  1. Flat race type with two flat washers

2. grooved race construction . May be single or double acting . Have twice te load carrying ability then flat race

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13
Q

What are the two types of bearing seals and what is the difference

A
  1. contacting seals-touch the surface and usually use a softer material in shaft side
  2. non-contacting seals- leave a small clearance. Labyrinth seal is a type of this.
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14
Q

When is it acceptable to spin a bearing with compressed air to clean it

A

Never. But if you do…hold te bearing and don’t let it spin

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15
Q

What is another name for a press fit bearing mounting

A

Interference fit

Like the videos we watche d

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16
Q

Can cylindrical roller bearings carry combination(radial and axial) loads?

A

No they can only carry radial loads

17
Q

When are tapered roller bearings used?

A

Designed for slower speeds, can handle high radial and thrust loads but can not handle any real misalignment

18
Q

What is advantage of spherical roller bearing

A

May be single or double row

Designed to handle heavy radial and axial. Can function with misalignment

19
Q

What is the difference between a cylindrical roller bearing and a needle bearing assembly

A

Needle row bearings are a type of cylindrical but are 6-10 times longer and typical smaller than 1/4in.

20
Q

List important things to consider wen installing a bearing into an internal opening

A
  1. cleanliness
  2. original container
  3. associated parts
  4. never spin with air
  5. never force a seal or shield
  6. bearing alignment
  7. press only on ring or raceway
21
Q

What are the thermal methods used for mounting bearings

A
  1. oil bath
  2. Heating plates
  3. induction heating
22
Q

Why should you never use a torch to heat bearings to install them

A

Open flames usually far exceed max temp and could change the temper of the metal of te bearing

23
Q

Why should you never use a torch to heat a bearing on a hardened shaft or axle when trying to remove it

A

J

24
Q

Explain what a pillow block bearing is and list the two types

A

Pillow block act as parallel support for a shaft and can be either

One piece

Split

25
Q

What is a flange bearing and where can it be used

A

Flange bearings are used when mounting surface is perpendicular to shaft

26
Q

Explain what take ups are and where are they used

A

Provide ajustment for bearing position…allow movement of bearing and shaft

Used to adjust the center distance between two shafts

27
Q

When troubleshooting a bearing what does increased vibration usually indicate

A

Something is loose

28
Q

Review pictures of bearings

A

B

29
Q

Review pictures of bearings

A

H

30
Q

Review pictures of bearings

A

Yh

31
Q

Identify the basic bearings of the two basic types

A

H

32
Q

Explain the different ways of installing new a bearing

A

Hammer and sleeve
Arbor or hydronic press
Integral thread mounting

33
Q

Proper way to maintain bearings

A

H

34
Q

Difference between axial, radial, and combination load bearings

A

J

35
Q

What is a bearing

A

H

Mexh Sys B70 (6 decks)

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