• 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
Composite Profile of a Surface Is Your Most Powerful Tool
(In accordance with Y14.5M-1994 standard)

PDF of this Tip

Many of you have requested that I put together a Tip or two on composite profile. I decided to use something we are all familiar with - food. Let’s say you run a bakery. Customers have an expectation of how a loaf of bread should "look". They expect to see a nice radius on the top. They do not want to see the three loaves shown below. The first is just a mess, the second is tall on one end and short on the other and the third has a relatively flat top instead of the radius we have all come to expect. The large profile tolerance controlling the top of the loaf allows all of these undesirable conditions. On the following illustrations the profile tolerance has been revised to be a composite profile tolerance.

Possible unacceptable loaves of bread according to the drawing above.

The goal is to have loaves of bread with a large tolerance on the height but better control of the orientation and form.

Although this Tip was about loaves of bread, I have had many customers with parts that required similar controls. Composite profile of a surface is the only way to clearly define these requirements.

Back to Tips Tip added May 2003