Seals And Lube Flashcards
Adequate lubrication is essential for?
Bearing life and efficiency
What is #1 mtc priority?
Lubrication
Bearings can be lubricated with?
Oil
Grease
What are suitable for severe applications?
Synthetics
Dry lubes
What is grease made of?
Petroleum or synthetic oil
Thickener
Additives
What is grease good for?
Low to moderate speed applications
What atmosphere is grease good for?
Food and chemical industries
Oil is used for?
High speed or high temp
What can excessive oil viscosity cause in rolling-element bearings?
Skidding
What is least expensive type of oils?
Petroleum
What is more expensive type of oil?
Synthetic
What are dry lubes good for?
Low speeds, high temps
How much lube for rolling elements bearings in housing?
1/3-1 1/2 diameter of lowest rolling element
What do linear bearings do?
Support low friction motion in one direction
What does linear bearings consist of?
Railway or guide -(fixed component)
Support (block, shoe, carriage or slide)- (moving part)
What are seals for?
Keep elements out and lube in.
What are the two types of seals?
Contact
Non-contact
What are labyrinth seals good for?
High speed applications
What do mounted bearings do?
Reduce friction where machined bearing seats are impractical
Where are flanged cartridge blocks used?
Vertical surfaces where shaft passes thru
Where are “take up units” used?
To adjust distance between shafts where belt tightening is required
What are the two types of mounted rolling element bearings?
Set screw
Eccentric
What is a “rod end bearing”?
Spherical ball that rotates within a race to accommodate a wide range of angular misalignment
What type of motion can “cam-type” and load-following” handle?
Both symmetrical and elliptical
