Bearings Flashcards Preview

Module 4, Lesson 3 > Bearings > Flashcards

Flashcards in Bearings Deck (23):
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

Types of roller bearings

Needle, tapered, spherical