![]() That is minimum hole size and maximum shaft size. This is a condition of a part feature wherein it contains the maximum amount of material within the stated size limits. This is applied to the size dimension in order to invoke the principle of independency to regular features of size and override Rule #1. This is also the opposite to Maximum Material Condition. This implies that condition of a part feature of size wherein it contains the least amount of material, examples, largest hole size, and smallest shaft size. This is a term used to describe distortion of a part after removal of forces applied during the manufacturing process. This is the condition of a surface having all elements in one plane. Datum references and modifiers applicable to the feature or the datums are also contained in this box if necessary. This is a rectangular box containing the geometric characteristics symbol, and the form, runout, or location tolerance. This symbol signifies that the dimension originates from the plane that is established by the shorter surface, and dimensional limits apply to the other surface. If a feature control frame is used then this symbol will indicate that the tolerance is diametrical. This symbol indicates a circular feature when used on the field of a drawing. This symbol will precede the depth value with no space in between. This symbol is used to indicate that a dimension applies to the depth of a feature. This is a specified line, point, or area on a part that is used to establish the Datum Reference Plane for manufacturing and inspection operations. This is the actual component feature used to establish a datum. This symbol describes a condition of a surface of revolution in which all points of a surface are equidistant from a common axis. This symbol will precede the dimension of the spotface or counterbore, with no space. This symbol is used to simply indicate a spotface or a counterbore. Also, radii taken at all points on the part contour shall neither be smaller than the specified minimum limit nor larger than the maximum limit. ![]() Where a controlled radius is specified, the part contour within the crescent-shaped tolerance zone must be a fair curve without flats or reversals. This creates a tolerance zone defined by two arcs (min max radii) that are tangent to the adjacent surfaces. This can be in either symbol or note form, and is used to identify a group of two or more features of size, where there is a requirement that they be treated geometrically as a single feature of size. This symbol is always shown with the vertical leg to the left, and indicates the taper for conical tapers. This describes a condition in which two or more features, in any combination, have a common axis. These letters are referenced using the between symbol (post 1994), or the word “between” (pre 1994). This indicates that a profile tolerance applies to several contiguous features and letters may designate where the profile tolerance begins and ends. The basic dimension will always be associated with a feature control frame or datum target. This symbol is used to describe the exact size, orientation, profile, or location of a feature. This symbol will be placed above a dimension and indicates that a dimension is an arc length measured on a curved outline. This is the condition of a surface, axis, or centerplane, which is at a specified angle from a datum plane or axis. This symbol will be indicated on the leader line. To apply a requirement to all features all over one side of a parting line. To apply a requirement to all features all around one side of a parting line. ![]() All Over Specification:Īs well as surface tolerance noted above, this symbol specifies that the tolerance all over on the field of the drawing. This indicates that a tolerance is applied to all surfaces around the part. ![]()
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