bearing seals and pillow blocks Flashcards
What oil seal would offer the best protection against vapors?
Lip seal.
Which low speed oil seal tolerate a lot of end float?
V-ring seal
On a pillow block how, is the cap accurately aligned to the base?
The cap is doweled To the base.
How is a bearing fixed in position within a pillow block?
Inserting a locating ring.
What is the least expensive but weakest material for a pillow block?
Cast iron
What is the strongest material for a pillow block?
Cast steel
What type of anti friction pillow block will handle the heaviest side load?
Pillow block with a 4 bolt cap
What is the purpose of so much space around the bearing inside a pillow block?
To allow lubricant to prevent heat build up
What high speed grease seal would be best for exposure to high levels of contamination?
Combination radial and labyrinth seal
What is the purpose of allowing a bearing to float in a pillow block?
To allow for radial movement of the bearing when the shaft expands our contracts.
What type of bearing housing would you use if the mounting surface it’s at 90 degrees to the axis of the shaft?
A flange bearing housing.
What are two common metallic liner materials used in plain bearings pillow blocks
Babbitt and phosphorus bronze
What are two non metallic liner materials used in plain bearings pillow block?
nylon and Teflon
Where would you use solid plain bearing pillow block?
On the end of the shaft.
What are 3 split joint design that are used in plain bearing pillow block?
Angular,gib, v joints
Which of these 3 joints designs would handle the greatest side loads
Gibb joint.
Can the caps of pillow blocks be interchangeable?
No
What is the purpose of locating rings in a pillow block?
To prevent the bearing from moving in the housing st that the it is fixed the desired location.
If a single locating ring is used, on which side of the bearing is it best to install it?
On the same side as the retaining nut.
Which should be greased first, the seal or the bearing?
The bearing first.
What is the purpose of a grease fitting on a labyrinth seal.
To inject grease into the grooves in the seal for more efficient sealing.
In which direction should the lock collar be turned to ensure that it doesn’t loosen?
In the direction of rotation.
