Couplings

Question 1

What do couplings do?

Answer 1

Connect two shafts that turn in the same direction on the same centerline

Question 2

What are the three major types of shaft couplings?

Answer 2

Rigid
Flexible
Universal Joint

Question 3

What are the three types of rigid couplings?

Answer 3

Flange
Sleeve
Ribbed

Question 4

What is the simplest type of coupling?

Answer 4

Rigid

Question 5

What major type of coupling has the highest size for size torque transfer?

Answer 5

Rigid

Question 6

Pros of Rigid couplings?

Answer 6

Low maintenance
No Lubricant
High torque transfer

Question 7

Cons of Rigid couplings?

Answer 7

No machine protection

Must provide and maintain perfect alignment

Has to have proper bearing support

Question 8

What rigid coupling connects the same or different diameter shafts accommodates some misalignment and has heavy duty applications?

Answer 8

Flange couplings

Question 9

Pros of flange couplings?

Answer 9

No lube

Minimum maintenance (tighten bolts)

Easy install and removal

Question 10

Couplings that connect the same or different size shafts has the least amount of torque transfer and uses set screws to keep from sliding on shaft?

Answer 10

Sleeve couplings

Question 11

Rigid coupling with the most torque transfer, connect shafts of the same size, and maintenance free?

Answer 11

Ribbed couplings

Question 12

What type of couplings allow some misalignment?

Answer 12

Flexible couplings

Question 13

Three types of shaft misalignment?

Answer 13

Angular

Parallel

Axial (end play, end float)

Question 14

What are some other functions of flexible couplings?

Answer 14

Protect equipment
Damper from shock and vibration
Insulate from thermal and electrical
Measure input and output speed

Question 15

Are all general purpose coupling similar?

Answer 15

Yes considered “off the shelf”

Question 16

Mechanically flexible coupling with High torque at high speeds with two hubs with external gear teeth and accommodate misalignment through backlash?

Answer 16

Gear couplings

Question 17

What is backlash?

Answer 17

Engineered clearence for
Lube
Misalignment
Thermal expansion

Question 18

What does crowned teeth do on gear couplings

Answer 18

More misalinement

Question 19

What is most power - dense flexible coupling?

Answer 19

Gear couplings

Question 20

How often do you lube gear couplings?

Answer 20

At least once a month

Question 21

Two hubs with sprockets mated with double roller chain

Answer 21

Chain couplings

Question 22

What flexible coupling is best for shock and vibration?

Answer 22

Chain couplings

Question 23

Three types of chain couplings?

Answer 23

Double roller
Silent
Plastic

Question 24

Most common chain coupling and suitable for moderate speed and load?

Answer 24

Double roller chain coupling

Question 25

Chain coupling for heavy drives and high torque most power transfer of chain couplings?

Answer 25

Silent chain couplings

Question 26

Chain coupling that uses nylon and requires no lube, light loads, corrosive areas?

Answer 26

Plastic chain couplings

Question 27

Flexible coupling with two hubs with multiple slots with grid that goes in slots?

Answer 27

Grid coupling

Question 28

What do covers do for grid couplings?

Answer 28

Retain lube Prevent contamination Act as safety device

Question 29

What coupling is for large misalignment? 90 degrees

Answer 29

U joint

Question 30

Three types of flexible couplings?

Answer 30

Gear coupling Grid coupling Chain coupling

Question 31

Three types of U joints?

Answer 31

Pin and block Cross and bearing Single and double U Joint

Question 32

Two hubs with drilled ears, center block, two pins?

Answer 32

Pin and block

Question 33

What ujoint operates through friction?

Answer 33

Pin and block

Question 34

U joint with two Ushaped Hubs cross shaped peace and needle bearings at end?

Answer 34

Cross and bearing

Question 35

U joint with no parrelle misalignment and can operate in minimal space?

Answer 35

Single ujoint

Question 36

Two single u Joints butted together?

Answer 36

Double u joints