Please enable JavaScript.
Coggle requires JavaScript to display documents.
Dimensions. Tolerance, assemblies - Coggle Diagram
Dimensions. Tolerance, assemblies
Dimensioning
-
Types of dimensioning
parallel(datum)
consists of several dimensioning originating from a common reference surface which also known as datum
-
-
-
-
-
tolerances
If tolerance is not given, exact measurement of the parts must be made. Rejection rate will be very high and is not realistic.
The range of tolerance will translate into the manufacturing method needed, since different manufacturing method has different degree of tolerance.
Same parts can be made from different companies and they have to be interchangeable. Tolerance ensures good quality control for parts from different companies.
-
types of tolerances
Bilateral Tolerance
allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
-
-
-
interference fit
e.g. the minimum shaft diameter is 49.8, which is larger than the maximum hole diameter of 49.5. Hence, this would be an interference fit.
clearance fit
e.g. the minimum shaft diameter is 49.2, which is smaller than the maximum hole diameter of 49.5. Hence, this would be an clearance fit.
-
Bill of Material
Part Number, Quantity, and Material