7.6 Flashcards
1
Q
What are clearance fits
A
There is always some play after assembly
2
Q
What is an interference fit
A
No movement is possible after assembly
3
Q
What are the three classes of interference fit and what do they do
A
Driving fit - when shaft is slightly larger than the hole
Force fit - where parts are forced together
Shrink fit - when the parts are joined to be held in place permanently
4
Q
What is a transition fit
A
In between the interference and clearance fits there is an immediate fit called a transition fit
5
Q
What is an allowance
A
An allowance is rhetorical difference in dimension that is necessary to give a particular class of fit between two parts
6
Q
What is a tolerance
A
Total amount of variation in the size of a part
