Dimensioning, ContinuedUniquemethods ofdimensioningVarious characteristics and features of parts require unique methods ofdimensioning. These special situations include diameters, radii, roundedcorners and ends, round, slotted, counterbored, countersunk, andcounterdrilled holes, spot-facing, and chamfers.DiametersWhen indicating the diameter of a circular shape, the diameter symbol ()precedes all diametral values. When you must show the diameters of anumber of concentric or eccentric cylindrical features, dimension them in alongitudinal or front view.Figure 3-26 shows diametral values.Figure 3-26.—Dimensioning diametral values.Continued on next page3-30
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