Bearings Flashcards Preview

Module 4, Lesson 3 > Bearings > Flashcards

Flashcards in Bearings Deck (23)
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1
Q

Force

A

Push or Pull

2
Q

Work

A

Work is done when something moves - not the same as torque

3
Q

Energy

A

The ability to do work

4
Q

Power

A

Horsepower - how fast work is done

5
Q

Torque

A

Measured in inch-lbs, ft-lbs, and newton - meters

6
Q

PT components

A

Bearings, gearing, chains, and couplings/shafts

7
Q

What is a bearing?

A

A device that accepts motion, combats friction and wear, and continuously supports the load

8
Q

Applications for bearings

A

Conveyors, fans/blowers, automobiles, and gearboxes

9
Q

Two bearing classes

A

Anti-friction (rolling element) and Sleeve

10
Q

Types of anti-friction bearings

A

Ball bearings, tapered bearings, and spherical bearings

11
Q

Bearings serve what type of loads?

A

Radial loads and thrust loads

12
Q

Ball bearing advantages

A

Cost, availability, reliability, power savings, and increased production

13
Q

Ball bearing disadvantages

A

Limited thrust capacity, limited speed capacity, fail sooner, and often produce catastrophic failures

14
Q

Roller bearing advantages

A

Tapered roller bearings can carry both thrust and radial loads, bigger loads, easier to seal lube in “for life”

15
Q

Roller bearing disadvantages

A

Fatigue failure issues, require more space, higher cost

16
Q

What is the main function of bearing lube?

A

Maintains a film or “wedge” of oil between rollings surfaces to reduce friction

17
Q

Purpose of bearing lube

A

dissipates heat, preserves finish on bearing, protects from dirt, moisture, and other contaminants

18
Q

Do all bearings require lube?

A

No

19
Q

Type of Plain Bearing

A

Sleeve bearing

20
Q

Sleeve bearings are also known as

A

Non-rolling bearings, journal, or plain bearings

21
Q

What are sleeve bearings made out of

A

Metal, plastic, graphite, and wood

22
Q

Sleeve bearing types

A

GGB, EDT, bronze brushing

23
Q

Types of roller bearings

A

Needle, tapered, spherical