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Profile of a Line GD&T Guide

Profile of a line describes a tolerance zone around any curved or linear feature that specifies the amount of allowable variation from the true profile shape. It sets parallel tolerance curves above and below the nominal profile to define an acceptable range for cross-sections along the feature. A profile of a line tolerance can be applied to curved surfaces, radii, or any linear feature to control its contour variation.

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158 views2 pages

Profile of a Line GD&T Guide

Profile of a line describes a tolerance zone around any curved or linear feature that specifies the amount of allowable variation from the true profile shape. It sets parallel tolerance curves above and below the nominal profile to define an acceptable range for cross-sections along the feature. A profile of a line tolerance can be applied to curved surfaces, radii, or any linear feature to control its contour variation.

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anish
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We take content rights seriously. If you suspect this is your content, claim it here.
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Profile of a Line

GD&T Symbol: 
Relative to Datum: Optional
MMC or LMC applicable: No
Drawing Callout:
Description:
Profile of a line describes a tolerance zone around any line in any feature, usually of a
curved shape. Profile of a line is a 2-Dimensional tolerance range that can be applied to
any linear tolerance. If it is called out on a surface, like a radius on a part – profile of a
line would specify how much that cross-section could vary from a true curved radius.
Profile of a line takes a cross section at any point along the surface and sets a tolerance
zone on either side of the profile. The profile of a line callout can also be set with an all-
around leader or given a specific range (see example).

GD&T Tolerance Zone:


2-Dimensional tolerance zone existing of two parallel curves that follow the contour of
the true surface profile. The application on where the tolerance zone applies can be
specified on the drawing. This tolerance zone may or may not be referenced by a
datum.

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