Aas Flashcards
What do you call the difference between the higher limit and lower limit of size
Tolerance
The designation which is used for the purpose of general identification
Nominal size
Dimensional variation allowed/prescribed in order to secure difference of fits between mating parts
Allowance
It is also known as the plus or minus tolerance
Bilateral tolerance
The permissible variation of the manufactured/machined dimensions
Tolerance
It is the best example for driving fit
A ball bearing on the shaft
If a pin is fitted in a hole, then the tolerance zone of the pin is entirely above of that hole, the fit obtained will be a/an:
Interference fit
For acceptable ideal range of tightness which may result from the application of specific combination of allowances and tolerances
Fit
The boundary that separates the object from another object and/or space
Surface
The commonly used tool to measure the diameter in machine shop operation but usually used with steel scale for measurement
Micrometer
The best instrument for measuring a thousandth of an inch
Vernier caliper
When two pieces are to remain permanently together but the shape of one or both would make it impracticable or impossible to force one within the other, the enveloping piece is heated and thereby expanded sufficiently to slide over the other and then cooled slowly with water
Shrink fit
A machine shop instrument for checking the flatness of plane surfaces to tenth of a thousand of a centimeter
Planimeter
A machine used for testing of very thin steel or surface layers
Rockwell test
Allowance added in the casting pattern to compensate for the contraction of metal
Shrinkage allowance
