Slot Profile Tolerance Tool

A simple example would be a set of holes (pattern) used to affix a name plate. The relative position of the holes is important (tighter tolerance), in order to match the same hole on the plate itself, but the absolute position of the entire pattern on the part may be less critical (looser tolerances) as long as the orientation is good. Profile Tolerances - Overview Profile was originally designed for mating contours Profile applies only to surfaces Profile is view -specific (applies only in view shown) Profile tolerances are automatically bilateral (U.O.S.) Profile requires basic dimensions (shape and/or location Profile tolerance may, or may not specify datums.

Let’s go back to the question box —

“Why is profile allowed to be designated as one-sided? Can other GD&T symbols also be one-sided?” First, let’s address a couple of points: there are two profile symbols: profile of a line and profile of a surface. Yes, each of them can have the tolerance amount that is unilateral (one-sided) or bilateral (both sides of the intended profile). Also realize that the profile symbols can be “unequal bilateral” where there is tolerance on both sides of the perfect shape, but more tolerance exists on one side. Some examples:

Slot Profile Tolerance Chart

Slot Profile Tolerance Meaning

No other GD&T symbol can use these options; there is no such thing as unilateral flatness or unilateral parallelism. Why is that? Well, when we talk about flatness or parallelism, the feature in question has no curvature. So the surface “is where it is.” Profile tolerances, however, have a curve (usually) and also one or more basic dimensions that describe the radius or other values. The prescribed radius is important, and if the curve dips in or out, it is directly impacting the given radius. With this in mind, I should point out the tolerance zones for some other GD&T symbols can float to one side or the other. For instance, a parallelism tolerance of 0.5 allows a surface to tilt 0.5 mm in either direction, but that is not considered a unilateral tolerance, because it is a flat surface. (If it curves in or out, it doesn’t have to follow a particular radius.)

Slot Profile Tolerance Definition

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