bearing seals and pillow blocks

Question 1

What oil seal would offer the best protection against vapors?

Answer 1

Lip seal.

Question 2

Which low speed oil seal tolerate a lot of end float?

Answer 2

V-ring seal

Question 3

On a pillow block how, is the cap accurately aligned to the base?

Answer 3

The cap is doweled To the base.

Question 4

How is a bearing fixed in position within a pillow block?

Answer 4

Inserting a locating ring.

Question 5

What is the least expensive but weakest material for a pillow block?

Answer 5

Cast iron

Question 6

What is the strongest material for a pillow block?

Answer 6

Cast steel

Question 7

What type of anti friction pillow block will handle the heaviest side load?

Answer 7

Pillow block with a 4 bolt cap

Question 8

What is the purpose of so much space around the bearing inside a pillow block?

Answer 8

To allow lubricant to prevent heat build up

Question 9

What high speed grease seal would be best for exposure to high levels of contamination?

Answer 9

Combination radial and labyrinth seal

Question 10

What is the purpose of allowing a bearing to float in a pillow block?

Answer 10

To allow for radial movement of the bearing when the shaft expands our contracts.

Question 11

What type of bearing housing would you use if the mounting surface it’s at 90 degrees to the axis of the shaft?

Answer 11

A flange bearing housing.

Question 12

What are two common metallic liner materials used in plain bearings pillow blocks

Answer 12

Babbitt and phosphorus bronze

Question 13

What are two non metallic liner materials used in plain bearings pillow block?

Answer 13

nylon and Teflon

Question 14

Where would you use solid plain bearing pillow block?

Answer 14

On the end of the shaft.

Question 15

What are 3 split joint design that are used in plain bearing pillow block?

Answer 15

Angular,gib, v joints

Question 16

Which of these 3 joints designs would handle the greatest side loads

Answer 16

Gibb joint.

Question 17

Can the caps of pillow blocks be interchangeable?

Answer 17

No

Question 18

What is the purpose of locating rings in a pillow block?

Answer 18

To prevent the bearing from moving in the housing st that the it is fixed the desired location.

Question 19

If a single locating ring is used, on which side of the bearing is it best to install it?

Answer 19

On the same side as the retaining nut.

Question 20

Which should be greased first, the seal or the bearing?

Answer 20

The bearing first.

Question 21

What is the purpose of a grease fitting on a labyrinth seal.

Answer 21

To inject grease into the grooves in the seal for more efficient sealing.

Question 22

In which direction should the lock collar be turned to ensure that it doesn’t loosen?

Answer 22

In the direction of rotation.