Flashcards in Measurement, part A and Part B Deck (19)
3 types of units of measurement in 🇨🇦?
- metric (millimetres [mm])
- Imperial-decimal (0.0004 inch)
- imperial-fraction (1/64 inch)
__________ refers to an imperial standard size which is used for purpose of general identification.
Definition of actual size ?
The measured size of component is the actual(measured) size or dimension.
__________ is the theoretical size to which the tolerance are applied.
_______ are the largest(upper limit) size and smallest(lower limit) size a part can be and still be acceptable.
Limit of Size
MMC and LMC stands for ?
Maximum Material Condition and Least Material Condition
________ is where both mating parts have the most mass(metal),
Maximum Material Condition (MMC)
_________ is the total of variation permitted is the size of duplicate parts.
What are the 2 types of tolerance ?
- Unilateral Tolerance
- Bilateral Tolerance
_______ is in one direction only from basic size and there is no Variation (Zero) in the other direction.
________ is in both direction ( equally or unequal ) from basic size.
In the ____________ method, only the maximum and minute mum dimension of the man part are specified.
_____ is the intentional difference between 2 mating parts at MMC.
Positive allowance, the hole is ________ than the shaft while Negative Allowance is ________ the the shaft.
Larger And Smaller
The term of _____ describes the tightness or looseness between two mating parts.
3 types of fit
- Interference Fit ( Allowance is Negative)
- Clearance Fit ( Allowance is positive)
- Transition Fit ( Negative Allowance but the total tolerances exceed the allowance)
Factors that can affect design tolerance of the mating parts include:
- Metal Type
2 types of fit system
Hole and Shaft Basis System