Technical Drawing Dimensioning Types

Dimensioning rules is very important for drawing standards. Proper dimensioning will help to manufacturers, engineers etc. to get better understanding of the designed parts. Selected front view should describe the part the best. All dimensions must be in decimals. All Dimensioning must be described either in inches or metric, if necessary either one of them can be described in parenthesis. All hidden lines should be removed unless necessary. Dimensions shouldn't be duplicated. Hidden lines shouldn't be dimensioned unless necessary. Dimensioned shouldn't be placed on the body unless necessary. Always given the diameter of a hole, not the radius. A Ø symbol must be used before the value.

Coordinate/Base Line Dimensioning:

Ordinate Dimensioning:

Bolt Holes Dimensioning:

Holes Callout Dimensioning:

Threaded Holes Callout: