Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
|
List two purposes of shaft keys? |
Timing devices Wear link |
|
|
Rule of thumb for key width |
1/4 diameter of the shaft |
|
|
When are Pratt and Whitney keys used? |
When the hub slides back and forth on the shaft |
|
|
What are the dimensions of a 1212 woodruff ? |
12 X 1/32 = width 3/8 wide
12 X 1/8 = diameter 1 1/2 diameter |
|
|
Where should sprockets and sheaves be located to reduce overhung loads which create bending stress ? |
As close to the bearing as possible |
|
|
Upper-case tolerance positions are used for____________ and lower-case tolerance positions are use for____________ . |
Bore size Shafts |
|
|
What is the taper on a Gib head key ? |
1/8" Per Foot |
|
|
Tapered keys should never be used in which type of hub ? |
Cast iron hubs |
|
|
In what direction do you look the eccentric collar on a pillow block ? |
In the direction of rotation |
|
|
What are the two main stresses a shaft must withstand ? |
Bending stress Torsional sheer stress |
|
|
What is the maximum distance between bearings on a line shaft ? |
8 ft. |
|
|
What is the carbon content of a 1018 shaft ? |
0.18 % |
|
|
What are the three types of fits ? |
Clearance fit Interference fit Transition fit |
|
|
Lead improves machinability.
True or false |
True |
|
|
Name two advantages of hollow shafting: |
Reduces weight with minimum strength reduction
Can conduct coolant |
