The total amount a specific dimension can vary. (ANSI Y14.5M-1994)
Tolerances are assigned so that any two mating parts will fit together.
Highly accurate parts are extremely expensive, so tolerances should be as generous as
Dimensions are used to describe the sizes and relationships between features in your drawing. Dimensions are used to manufacture parts and to inspect the resulting parts to determine if they are acceptable. Drawings with d
Sections are used to show interior details clearly.
A cutting-plane line shows where object was cut to obtain the section view.
Cross hatching in the section view shows the solid surface of the object which were cut th
Step by Step: Isometric Sketching
Isometric Projection vs. Sketch
Isometric projections are foreshortened because the object is tipped with respect to the viewing plane. Isometric ske
Used to hold parts together
Used to adjustment parts with reference to one another Used to transmit power
Screw Thread Terminology
Number of thread per inch 5 types
NC NF 8N 12N 16N
Ch7 Cutting plane-shows where the object is cut to show it in a separate view Full section-the section produced by cutting through the entire object Cutting plane line- p205, arrows indicate direction of sight for the sectional view. *a cutting plane line