![]() These features will genera lly result in a datum that is an axis or plane ( midplane ). Placed as one half in an open-ended size dimension ( in line with the arrow).Ī few common Feature of Size Datum Features are bores, cylinders, slots, or tabs.Symbol placed on the arrows of a size dimension.Placed off a feature control frame that is applied to a feature of size.Symbol placed on a non-planar feature of size.Symbol placed on the leader arrow of a size dimension.Symbol is placed on a dimension line directly in line with the dimension arrows.ĭatum Feature Symbol on a Feature of Size When the symbol is indicated in the methods stated above t his means that the datum feature is the surface of the associated with that symbol. (Datum feature is geometrically controlled.) Placed off a feature control frame that is applied to a surface.Symbol placed on a size dimension but placed offset of the dimension arrows.Leader arrow with the datum feature symbol pointing to a planar surface. ![]() Symbol placed on an extension line off the datum feature surface.Datum feature symbol placed directly on a planar surface.A dashed leader line indicates the far side surface. ![]()
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