Couplings

Question 1

What is used to connect two shafts that turn in the same direction on the same centerline?

Answer 1

Coupling

Question 2

Name the 3 major types of shaft couplings:

Answer 2

1) Rigid
2) Flexible
3) Universal joint

Question 3

Name 3 advantages of rigid couplings:

Answer 3

1) Low maintenance cost
2) No lubrication
3) Transmits the most power

Question 4

Name 3 disadvantages of Rigid couplings:

Answer 4

1) No machine protection
2) Requires near perfect alignment
3) Needs bearing support

Question 5

Name 3 common types of rigid couplings:

Answer 5

1) Flange
2) Sleeve
3) Ribbed

Question 6

Which type of Rigid coupling can be used to connect shafts of the same or different sizes?

Answer 6

Flange coupling

Question 7

Which type of Rigid coupling is made from one piece of material and transmits the least amount of power?

Answer 7

Sleeve coupling

Question 8

Which rigid type coupling is built for light to medium duty use?

Answer 8

Sleeve coupling

Question 9

Which rigid type coupling is used for heavy duty use?

Answer 9

Ribbed coupling

Question 10

Which type of Rigid coupling is made in two pieces and is used to connect shafts of the same diameter?

Answer 10

Ribbed coupling

Question 11

Which rigid type coupling is keyed to both shafts?

Answer 11

Ribbed coupling

Question 12

Aside from being so heavy duty, what is one big advantage to using ribbed couplings?

Answer 12

Maintenance free

Question 13

Which type of coupling will also flex while rotating to accommodate misalignment between shafts?

Answer 13

Flexible coupling

Question 14

Name 3 types of shaft misalignment:

Answer 14

1) Angular
2) Parallel
3) Axial movement

Question 15

What are 2 other names for “Axial movement”

Answer 15

1) End play
2) End float

Question 16

Name 4 flexible coupling functions:

Answer 16

1) Dampen vibration
2) Measure output speed
3) Insulated driver from driven
4) Protect equipment

Question 17

Which discipline covers very light machinery or instrumentation?

Answer 17

Miniature discipline

Question 18

Which discipline covers common couplings used in the heavy industry or couplings known as “off the shelf” ?

Answer 18

General purpose industrial discipline

Question 19

Name 3 types of mechanically flexible couplings:

Answer 19

1) Gear
2) Chain
3) Grid

Question 20

Of the 3 mechanically flexible couplings, which type transmits the most torque?

Answer 20

Gear coupling

Question 21

Backlash clearance in gear couplings allow what 3 things?

Answer 21

1) Misalignment
2) Place for lube
3) Thermal expansion

Question 22

Axial clearance between hubs is accomplished by providing what?

Answer 22

End float

Question 23

Name 3 types of chain couplings:

Answer 23

1) Double roller
2) Silent
3) Plastic

Question 24

Which chain couplings the most common and is suitable for moderate speed and loads?

Answer 24

Double roller chain coupling

Question 25

Which type of chain coupling is used for heavy duty drives requiring high torque?

Answer 25

Silent chain couplings

Question 26

Which chain coupling requires no lubrication and is suitable for light loads?

Answer 26

Plastic chain couplings

Question 27

Which chain coupling is used in undesirable locations and corrosive environments?

Answer 27

Plastic chain coupling

Question 28

Which mechanically flexible type coupling consists of two hubs with multiple slots through which a steel grid weaves back and forth?

Answer 28

Grid couplings

Question 29

Name two types of universal joints:

Answer 29

1) Pin and block
2) Cross and bearing

Question 30

Name 2 reasons why universal joints are desirable:

Answer 30

1) Transmit power at larger angles
2) Handle high amounts of misalignment

Question 31

What kind of bearings are used inside a cross and bearing coupling?

Answer 31

Needle bearings

Question 32

T or F
Universal joints only accommodate misalignment with a telescoping shaft?

Answer 32

True

Question 33

The insert inside a straight jaw coupling is called what?

Answer 33

Spider

Question 34

Name 5 couplings that don’t require lube:

Answer 34

1) Sleeved
2) Flanged
3) Ribbed
4) Jaw
5) Block

Question 35

Which type of coupling meets face to face?

Answer 35

Block coupling

Question 36

Which coupling has 2 hubs with protecting jaws that mate with a “spider” insert?

Answer 36

Straight jaw coupling