Couplings

Question 1

A shaft coupling is used for what?

Answer 1

To connect two shafts and turn in the same direction on the same centerline

Question 2

What are the 3 categories of couplings we discussed?

Answer 2

1. Rigid
2. Flexible
3. Universal joint

Question 3

What are the 3 types of rigid couplings?

Answer 3

1. Flange
2. Sleeve
3. Ribbed

Question 4

Pros of rigid couplings?

Answer 4

No lubrication, low maintenance and highest power transmission

Question 5

Cons of rigid couplings?

Answer 5

No machine protection, require perfect shaft alignment, and the bearing to be very close to the coupling

Question 6

What is the biggest advantage a flexible coupling has over a rigid coupling?

Answer 6

Allows for some misalignment

Question 7

Most common types of universal joint couplings?

Answer 7

Block and pin
Cross and bearing

Question 8

How do Universal joint couplings accommodate for misalignment?

Answer 8

By using a telescoping shaft that is square or splined

Question 9

What is the heaviest duty rigid coupling?

Answer 9

Ribbed coupling

Question 10

What is the lightest duty rigid coupling?

Answer 10

Sleeve coupling

Question 11

Biggest advantage of ribbed coupling?

Answer 11

Maintenance free

Question 12

Axial movement is also referred to as what?

Answer 12

End play or End float

Question 13

List 3 functions of flexible couplings?

Answer 13

1. Insulate the driver from the driven equipment
2. Instrumentation
3. Dampen vibration

Question 14

What are the 2 things backlash provides?

Answer 14

1. Clearance for misalignment
2. A place for lubrication

Question 15

Which flexible coupling is only used for instrumentation?

Answer 15

The miniature coupling

Question 16

Which coupling accommodates misalignment with axial clearance between gear teeth called backlash?

Answer 16

Gear coupling

Question 17

What are the 3 types of chain couplings?

Answer 17

1. Double roller
2. Silent chain
3. Plastic chain

Question 18

What are some couplings that would require lubrication?

Answer 18

Double roller, grid couplings, silent chain