Bearings Flashcards
Force
Push or Pull
Work
Work is done when something moves - not the same as torque
Energy
The ability to do work
Power
Horsepower - how fast work is done
Torque
Measured in inch-lbs, ft-lbs, and newton - meters
PT components
Bearings, gearing, chains, and couplings/shafts
What is a bearing?
A device that accepts motion, combats friction and wear, and continuously supports the load
Applications for bearings
Conveyors, fans/blowers, automobiles, and gearboxes
Two bearing classes
Anti-friction (rolling element) and Sleeve
Types of anti-friction bearings
Ball bearings, tapered bearings, and spherical bearings
Bearings serve what type of loads?
Radial loads and thrust loads
Ball bearing advantages
Cost, availability, reliability, power savings, and increased production
Ball bearing disadvantages
Limited thrust capacity, limited speed capacity, fail sooner, and often produce catastrophic failures
Roller bearing advantages
Tapered roller bearings can carry both thrust and radial loads, bigger loads, easier to seal lube in “for life”
Roller bearing disadvantages
Fatigue failure issues, require more space, higher cost
