EGN1111C
Midterm term review
Midterm term review
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Cartes-fiches
What are the dimensions for the cone?
Diameter for base and height
What are tolerances?
Total amount of variation permitted from the design size. It is the largest limit minus the smallest limit.
What is the design size? E.i; 2 X 4
The nominal size
What is allowance?
The tightest fit between two parts.
What are limits?
The largest and smallest a part or product is allowed to be.
What is Fit?
Amount of tightness or looseness between two mating parts.
Maximum Material Condition (MMC) is what?
The upper limits for external parts and lower limits for internal parts. Aka, allowance.
Least Material Condition (LMC) is:
The lowest limit for external parts and the upper limit for internal parts.
Geometric Demensioned and tolerances are used because of ___________________.
Universal mass production of parts
_____________ _____________ limites are given both + and - limits.
Bilateral Tolerance
___________ ___________ limits are given only one way, either upper or lower limit will have a value.
Unilateral Tolerance
What is clearance fit?
When there's always space between mating parts.
What is interference fit?
No space between mating parts. Also called a press fit.
What is transition fit?
Mating parts have both clearance and interference fits.
Which centerlines are the primary centerlines?
The centerlines that are in the center of the view.
Which type of hole needs a depth dimension?
Blind hole
What is block dimensioning?
A page tolerance that is used as a general note not covered by some other tolerancing type.
What are continued/chained dimensions?
Multiple dimensions placed end-to-end
What are baseline dimensions?
Multiple dimensions with offset dimension lines measured from the same location.
What are factors to consider when planning dimensions of mating parts?
The length of time they are to be engaged, speed at which they move, load they support, type of lubricant used, average tempurature they will operate in, humidity level, type of material, lifespan, capabilities of machinists operating the tool, and cost. (Length, speed, load, type, tempurature, humidity, material, lifespan, machinist, and cost)
