non threaded fasteners and locking devices

Question 1

what is a rivet

Answer 1

soft metal pin on one end that fastens parts together permanently

Question 2

six common rivet heads

Answer 2

oval
oval countersunk
flat
flat countersunk
button
truss

Question 3

what are rivets used for

Answer 3

quick and low cost joining/repair

Question 4

how are rivets measured

Answer 4

by the weight per 1000
ex. 1000 rivets that weigh 6 ounces, each rivet is called 6 ounces

Question 5

small solid rivets are available in what types of metals

Answer 5

steel
aluminum
brass
copper

Question 6

what are the uses of solid rivets

Answer 6

vehicle frames
cross members

Question 7

heat from hot solid rivets can cause what

Answer 7

structural damage

Question 8

what is the most common rivets

Answer 8

semi tubular rivets

Question 9

what are compression rivets

Answer 9

are male and female and usually have flat heads

Question 10

where are tubular rivets used

Answer 10

they appear in high volume production lines with automated riveting machines

Question 10

what are self piercing rivets

Answer 10

are machine rivets that make their own hole in the material they are joining

Question 11

three general categories of tubular rivets

Answer 11

semi tubular
compression
self piercing

Question 12

blind rivets are used for what

Answer 12

light duty use and easy, low cost method

Question 13

what are structural breakstem rivets

Answer 13

are high performance, flush break blind fasteners
they break off flush when stretched

Question 14

what are explosive rivets

Answer 14

good for blind application. they detonate a small explosion charge

Question 15

what is the strongest structural breakstem fasteners

Answer 15

lockbolt fasteners

Question 15

when mating a hub or gear with shaft what do you use

Answer 15

key

Question 16

what is the groove in a hub called where you put a key

Answer 16

keyway

Question 17

what is the groove in a shaft called where you put a key

Answer 17

keyseat

Question 18

when a hub and a shaft are subject to very heavy loads what should you do

Answer 18

use a chamfered key and a filleted keyway or keyseat

Question 19

woodruff keys are used for what

Answer 19

lighter application such as small pulleys or gears

Question 20

a key should have what clearance

Answer 20

0.002 to 0.005 inch

Question 21

when are Pratt and Whitney keys used

Answer 21

when a hub slides back a forth on shaft

Question 22

square keys are used up to what size diameter

Answer 22

6 inch

Question 22

flat keys are over what size diameter

Answer 22

6 inch

Question 23

a square and a flat key should be what diameter of the shaft

Answer 23

1/4

Question 24

if a shaft is 3 inches what square or flat size key would you use

Answer 24

3/4

Question 25

what do the first two digits of a woodruff key give you

Answer 25

the width in thirty-seconds of an inch

Question 26

what do the last two digits give you in a woodruff key

Answer 26

the diameter in eighths of an inch

Question 27

taper keys have what taper per foot

Answer 27

1/8

Question 28

what is the main purpose of a gib head key

Answer 28

to lock the hub the the shaft in heavy loading conditions

Question 29

What are splines used for

Answer 29

External grooves and lands machined on a shaft to match with internal grooves and lands inside a gear, collar, sleeve or coupling

Question 29

What are dowel pins grounded to?

Answer 29

0.0002 inch over nominal diameter

Question 30

When are tapered dowel pins used

Answer 30

They are for use when precise location is a requirement or with the frequent assembly and disassembly of parts

Question 31

What are shear pins used for

Answer 31

They are used to connect a gear or other part to a shaft designed to disconnect on overload

Question 32

Two types of radial locking pins

Answer 32

Solid grooved pins
Hollow roll or spring pin

Question 32

What do snap rings do?

Answer 32

Snap rings provide a removable shoulder to locate, retain or lock components accurately on shafts, bores and inside housings

Question 33

What self-locking ring is better? Internal or external?

Answer 33

Internal because it covers more diameter on the workpiece to hold it together