Pillow Blocks And Seals Flashcards
What are 3 types of external rubbing seals?
1.Lip Seal
2.V-Ring Seal
3.Felt Seal
What are 2 advantages of a running seal?
1.Retains oil/grease
2.Creates a positive seal to keep contaminants out
What are 4 advantages to non-running seals?
1.No wear
2. No Friction is created
3. No speed limits
4. Can operate at high temps
What is the purpose of a garter spring in a lip seal?
To provide contact pressure when the shaft is stationary
What is a common name for a integral non rubbing seal
A shield
What are plain bearing pillow blocks usually made of?
Cast iron or steel with a soft metal liner.
Babbit, aluminum, nylon, Teflon
Anti friction bearing pillow blocks most commonly house which two types of bearings?
Double row spherical roller bearings
Double row self aligning ball bearings
Which pillow blocks capacity is not reduced by angular loads
Unit pillow blocks
Which pillow block is self aligning?
Unit pillow block
What should be done when re-greasing a labyrinth seal ?
Grease bearing first then inject grease into the seal
What seal is a bearing shield?
Integral non rubbing seal
What is the upper temperature limit on a synthetic lip seal?
200
How many degrees of loading does a Gib Joint pillow block have ?
300
On an integral rubbing seal where does the lip seal make contact?
On the inner race of the bearing
What is the recommended location for the grease nipple on a spilt pillow block
On the cap opposite the retaining nut
How many directions can a load on a bearing come from?
3
Axial, radial, combo
How are horizontally split pillow block bearings supported when mounted on an angle?
Stop blocks
What angle should you install a stop block at when on an angle?
55 degrees and higher
How many degrees of zone loading is available on a solid plan bearing pillow block?
360 degrees
What is the purpose of having a two piece pillow block?
To make assembly and maintenance easier
How is a bearing removed or installed in a unit pillow block housing?
The housing has loading slots
