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Flashcards in Main Propulsion Deck (75)
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1

Two main categories of bearing

Plain bearings
Anti-friction bearings

2

Have a solid surface on which a moving part slides or rolls

Plain bearing

3

Depends on races containing balls or rollers to make contact with the revolving or sliding surface that it is supporting

Anti-friction bearing

4

The two categories of bearings are broken down into three main types

Journal bearings
Thrust bearings
Frictionless bearings

5

Also called split precision bearings

Journal bearings

6

Support a rotating shaft, support a radial load

Journal bearings

7

Prevent endwise (axial) motion of a shaft

Thrust bearings

8

Used for guiding or supporting rotating components

Frictionless bearings

9

Two concerns that affect choice of bearing type

Load type and motion type

10

Bearings can be classified by ___

Type of movement allowed
Type of load that it will carry
Type of surface that the bearing will come into contact with

11

When movement within an engine must be controlled to keep engine components in proper alignment by bearings, the motion is divided into two types ___

Axial
Rotary

12

Movement along the axis of the shaft that can be in either one direction or back and forth

Axial

13

Circular movement around the axis of the shaft

Rotary

14

Load is divided into three types

Radial
Thrust
Radial thrust

15

Has a load that is at right angles to the axis of the shaft

Radial

16

Has a load that is along the axis of the shaft

Thrust

17

Has a load that is a combination of both radial and thrust loads

Radial thrust

18

Two types of surface contact that classify bearings

Sliding contact (plain bearings)
Rolling contact (anti-friction bearings)

19

These bearings are made of softer material than that of the shaft or slide that the bearing will support

Plain bearings

20

Also called roller contact bearings

Anti-friction bearings

21

Have a small contact area between the races and the ball or roller of the bearing supports the load on the bearing

Anti-friction bearings

22

The balls and rollers of anti-friction bearings are made of ___

Hardened alloy steels

23

Ball bearings, roller bearings, and needle bearings are all ___

Anti-friction bearings

24

Ball bearing support a load on a series of hardened steel balls and consist of four parts ____

Inner ring or race
Outer ring or race
Steel balls
Ball retainer or cage

25

The inner ring or race of a ball bearing is ___ on its outer surface

Grooved

26

The outer ring or race of a ball bearing is ___ on its inner surface

Grooved

27

Used for spacing the balls in a ball bearing so that they do not touch each other, thus reducing friction, wear, and noise

Ball retainer or cage

28

Roller bearings come in three distinct shapes __

Cylindrical
Tapered
Barrel

29

This roller bearing supports radial load only. Intended to handle the heavy radial loads and to operate at higher speeds

Cylindrical

30

This roller bearing supports radial load, with an axial load in one direction only

Tapered