Couplings 1

Question 1

A shaft coupling is used for…

Answer 1

Connecting 2 shafts that turn in the same direction on the same center line.

Question 2

What are the three major types of shaft couplings?

Answer 2

Rigid, flexible and universal joint

Question 3

What are Rigid couplings used for?

Answer 3

To connect shafts that are perfectly aligned.

Question 4

What are the 3 types of rigid couplings?

Answer 4

Flange (most common)
Sleeve (least amount of power transfer)
Ribbed (most power transfer)

Question 5

What is the simplest type of coupling?

Answer 5

Rigid

Question 6

Where do support bearings go?

Answer 6

As close to the coupling as possible.

Question 7

Flange couplings are used to,

Answer 7

Connect shafts of the same or different diameter.

Question 8

Advantages of flange couplings

Answer 8

1) joins shafts of same or different diameter.
2) easy to install
3) minimum mtc and wear
4) heavy duty applications

Question 9

Ribbed coupling advantages

Answer 9

Heavy duty use
Mtc free
Easy to install or remove
Connects shafts of same diameter
Offers the most power transfer

Question 10

Which type of rigid couplings can couple shafts of different diameters?

Answer 10

Flange and sleeve

Question 11

Which couplings offer the least amount of power transfer?

Answer 11

Sleeve

Question 12

Disadvantages of ribbed couplings

Answer 12

1) Must have perfectly aligned shafts to work properly.
2) No machine protection
3) Bearings must be as close to the coupling as possible.

Question 13

What are the two types of misalignment?

Answer 13

Angular and parallel

Question 14

What does angular misalignment mean?

Answer 14

The shafts don’t meet in the middle correctly

Question 15

What does parallel misalignment mean?

Answer 15

They are on a different plane field vertically.

Question 16

Axial movement is also known as

Answer 16

End play and in float

Question 17

Axial movement
(Also known as end play and in float)
Means what?

Answer 17

Shaft will be moving constantly.
In play and inflow for room for the flexible coupling to flex and move a bit.

Question 18

3 functions of flexible couplings

Answer 18

Protect equipment
Dampen (vibration and shock)
Insulate (from heat and electricity)
Measure (output speeds)

Question 19

What is miniature variety?

Answer 19

Used on Light machinery
And instrumentation

Question 20

General purpose means what?

Answer 20

Common couplings

Question 21

Special purpose means?

Answer 21

Very specific to the application

Question 22

Gear couplings of the flexible couplings transmit?

Answer 22

The most torque

Question 23

Gear couplings
Backlash is engendered clearance for what?

Answer 23

Misalignment
A place for lubrication
An allowable space for thermal expansion to happen

Question 24

What is the most common style chain coupling?

Answer 24

Double roller chain

Question 25

Nylon or plastic chain is used when?

Answer 25

Corrosive environments
Back in hard to reach places of machinery.

Question 26

Chain types of couplings

Answer 26

Double roller chain
Nylon or plastic chain
Silent or inverted tooth chain

Question 27

What are the two types of U joint couplings

Answer 27

Pin and block (no friction)
Cross and bearing (low friction)

Question 28

What do U joints need to work with misalignment?

Answer 28

A telescoping shaft

Question 29

Elastomeric/ corded tire couplings

Answer 29

Insulate
Protects machinery
No lube required
Needs near perfect alignment

Question 30

Straight jaw couplings have what in them and what about them?

Answer 30

A spider is in them
They must fit tight
Also needs near perfect alignment