• 1-888-TEC-EASE
  • Outside USA: 1-716-785-6015
Tec-Ease Coupon GD&T Textbooks GD&T Training GD&T Public Seminars GD&T Computer Based Training GD&T Reference Material
Apply Profile of a Surface to Surfaces
(In accordance with Y14.5M-1994 standard)

PDF of this Tip

It really does matter where you place a geometric tolerance. Often it can change the meaning. Other times it can be just plain wrong. Profile of a surface is often applied incorrectly. It is called “profile of a surface”. It applies to a feature’s surface. Therefore, it must be applied to surfaces on a drawing.

On this drawing, two profile of a surface tolerances have been applied incorrectly. They are shown crossed out on the drawing. The profile of a surface tolerance labeled “OK” illustrates proper application of a surface control.

Applying a geometric tolerance to a size dimension usually is controlling the axis or center plane. Profile of a surface never controls an axis or center plane. It is easy to do it right.

Back to Tips Tip added Jul 2008