{"id":18067,"date":"2022-06-21T08:50:01","date_gmt":"2022-06-21T05:50:01","guid":{"rendered":"https:\/\/fractory.com\/?p=18067"},"modified":"2024-01-26T13:45:59","modified_gmt":"2024-01-26T11:45:59","slug":"profile-of-a-line-gdt-explained","status":"publish","type":"post","link":"https:\/\/fractory.com\/profile-of-a-line-gdt-explained\/","title":{"rendered":"Profile of a Line (GD&T) Explained"},"content":{"rendered":"

GD&T<\/a> lists fourteen different geometrical tolerances according to ASME Y14.5-2009. These tolerances allow us to control and define part features in different ways. For ease of understanding, these fourteen tolerances have been segregated into five different groups based on similarities between them. These five groups are form, profile, orientation, location and runout.<\/p>\n

In this article, we shall take a look at the profile of a line tolerance that belongs to the profile group along with profile of a surface<\/a>. Line profile tolerance is quite common and it helps us to manufacture parts with complex shapes. But first, let’s start by defining what it is.<\/p>\n

What Is Profile of a Line in GD&T?<\/h2>\n

The profile of a line tolerance is a 2D GD&T callout that can define and control a linear\/curved feature or a surface cross-section within specified limits. We can use it to control the form, location, orientation and size of a feature. This callout can only be used on surfaces and cannot be used to locate a central axis or plane.<\/p>\n

The line profile callout is typically used in the case of complex curves. These could be simple or advanced algebraic curves. The callout simply mimics the curve irrespective of the complexity.<\/p>\n

Profile of a Line Tolerance Zone<\/h2>\n

\"LineThe line profile tolerance creates a true profile where the curve should ideally be located. The actual curve is evaluated with respect to this true contour. The actual curve must conform as much as possible to this true profile.<\/p>\n

The tolerance zone is made of two parallel lines that follow the true profile in either direction. Unless stated otherwise, these parallel lines are assumed to be equidistant from the true profile.<\/p>\n

The distance between the two parallel curves is the tolerance limit. Every point on the actual curve must lie between these two lines of the tolerance zone for approval.<\/p>\n

Line Profile vs Other Callouts<\/h2>\n
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