Flashcards in Bearings Deck (23)
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1
Force
Push or Pull
2
Work
Work is done when something moves - not the same as torque
3
Energy
The ability to do work
4
Power
Horsepower - how fast work is done
5
Torque
Measured in inch-lbs, ft-lbs, and newton - meters
6
PT components
Bearings, gearing, chains, and couplings/shafts
7
What is a bearing?
A device that accepts motion, combats friction and wear, and continuously supports the load
8
Applications for bearings
Conveyors, fans/blowers, automobiles, and gearboxes
9
Two bearing classes
Anti-friction (rolling element) and Sleeve
10
Types of anti-friction bearings
Ball bearings, tapered bearings, and spherical bearings
11
Bearings serve what type of loads?
Radial loads and thrust loads
12
Ball bearing advantages
Cost, availability, reliability, power savings, and increased production
13
Ball bearing disadvantages
Limited thrust capacity, limited speed capacity, fail sooner, and often produce catastrophic failures
14
Roller bearing advantages
Tapered roller bearings can carry both thrust and radial loads, bigger loads, easier to seal lube in "for life"
15
Roller bearing disadvantages
Fatigue failure issues, require more space, higher cost
16
What is the main function of bearing lube?
Maintains a film or "wedge" of oil between rollings surfaces to reduce friction
17
Purpose of bearing lube
dissipates heat, preserves finish on bearing, protects from dirt, moisture, and other contaminants
18
Do all bearings require lube?
No
19
Type of Plain Bearing
Sleeve bearing
20
Sleeve bearings are also known as
Non-rolling bearings, journal, or plain bearings
21
What are sleeve bearings made out of
Metal, plastic, graphite, and wood
22
Sleeve bearing types
GGB, EDT, bronze brushing
23
