Lecture 15 Flashcards
(9 cards)
1
Q
Tolerance
A
- Allow for specific variation in size and geometry
2
Q
Why is Tolerating Necessary?
A
- Impossible to manufacture a part to its exact size and geometry
- Some variations may affect the part’s functionality
- Some variations affect the cost and manufacturing of the part
3
Q
Functionality and Cost
A
- Parts won’t fit together if they don’t fall within a certain range of values
- Tolerating parts allows for mass manufacturing to be feasible
- Cost generally increases with small tolerances
- Do not specify a smaller tolerance than necessary
4
Q
Tolerance Terms
A
Basic size
Nominal size
Allowance
Maximum Clearance
5
Q
Maximum Clearance
A
- Largest space between mating parts
6
Q
Allowance
A
- Minimum space between mating two parts
7
Q
Types of Fit
A
- Clearance Fit
- Transition Fit
- Interference Fit
8
Q
Basic size
A
- Size in which a tolerance is applied to
- eg. Hole size for a doorknob
9
Q
Nominal Size
A
- Size of the part that tolerance is applied to
eg. The door
