Definition of Terms- Basic Dimensions GD&T

By Chris A. Lindenberger | Jul 5, 2018 | 0 Comments

In GD&T basic dimensions used to be a fairly simple thing to define. However, today, among other things, “Basic dimensions” are numbers on an engineering drawing that represent values of size in whatever the measurement system being used on the drawing is. Those values are used to describe the theoretically exact size, profile, orientation or […]

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Definition of Terms-Concentricity

By Chris A. Lindenberger | Jun 14, 2018 | 0 Comments

Today we’re going to look at the concentricity control. This control is used a lot in a variety of situations that involve coaxial relationships. The definition states that concentricity controls ‘all’ diametrically opposed elements of a figure of revolution. Breaking Down the Basics Let’s break that down and look at a few rules for this […]

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Definition of Terms-Parts and Features

By Chris A. Lindenberger | May 17, 2018 | 0 Comments

Today I want to talk about a common definition for something we all talk about when the subject of GD&T comes up. I think it’s safe to say that the vast majority of people reading this series earn their livings on the floors of American factories. We design, machine, assemble, weld, measure, probe, form, punch, […]

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Definition of Terms- Maximum Material Condition

By Chris A. Lindenberger | Apr 17, 2018 | 0 Comments

With the previous topic, Rule #1, we discussed the need for a guiding principle to govern the need for geometry to follow rules that allow things to fit under all conditions, given that the proper engineering has been established for the condition being considered. That principal was stated as “size controls form.” In it the […]

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Definition of Terms-Feature Control Frames

By Chris A. Lindenberger | Mar 15, 2018 | 0 Comments

Today our featured GD&T term is “feature control frames.” We at Metalcraft decided some time ago to put together a glossary of sorts. It will be alphabetized in proper fashion but as various terms are added they will not be added in A to Z fashion, but more in order of importance, or more importantly, […]

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