Position vs runout explained: Learn how each tolerance controls coaxial features, how they’re measured, and what they actually limit.
In this design review, Jason examines the application of GD&T and tolerancing strategy for the Ambifacient Lunar Waneshaft used in the Turboencabulator, focusing on functional intent, manufacturability, and inspection considerations.
In this Question Line video, Jason reviews a drawing of a clevis bracket to show the potential effects of rounding basic dimensions.
In this Question Line video, Jason reviews a submitted drawing that attempts to locate two parts relative to each other and explains how to choose the correct GD&T tolerances to support the intended function.
In this Question Line video, Jason walks through an example where one feature control frame is controlling position for multiple features and identifies where this practice is outlined in the ASME Y14.5 spec.
Jason explains when to use GD&T versus traditional coordinate dimensions and compares both methods using example drawings.
In this Question Line video, Jason compares coaxiality and concentricity, as well as position, as defined by the ISO 1101 standard.
In this Question Line video, Jason answers questions regarding True Position and how to calculate diametric deviations. He discusses the difference between "True Position" and "Position" and walks through the process of determining whether the part passes inspection.
Jason walks through a drawing that includes a position control on a bolt circle, explaining what the feature control frame is and is not controlling.
In this Question Line video, Jason walks through an assembly drawing to explain the scenario where a feature being controlled by position must have a reference size dimension rather than a tolerance on the size of the feature.
In this video, Jason explains how to use a Multiple Single Segment feature control frame to achieve bidirectional position control.
Geometric Dimensioning and Tolerancing, and the concept of “True Position,” originated due to a rejection of functional parts as a result of coordinate dimensioning. Let’s look at a simple assembly to illustrate why this is true, and how GD&T Position takes care of this problem.
In this Question Line Video, Jason reviews a drawing example and compares the ASME and ISO standards for controlling a hole with position tolerance.
In this question line video, we explain when to use the diameter symbol in a feature control frame. The examples below illustrate the unique tolerance zones shapes and sizes for position, perpendicularity, straightness, runout, and cylindricity controls.
When applying position tolerances to countersunk fixed fastener assembly conditions, our design must not only ensure assembly, but also that the fastener head sits flush or below the surface of the part. We are able to determine the values required to achieve this by using the fixed fastener equation.
Though many people refer to the GD&T Position symbol as "True Position," they are not the same thing. Read on to learn the difference between Position and True Position and how they work together to define the position of a feature.
This video is in response to a question that we received on our question line from Tim. Tim’s question is as follows: “We tend to use true position on threaded holes. Is this valid? If...
A question we are often asked here at GD&T Basics is, “what is a basic dimension?” – These dimensions are often fairly confusing as they look very similar to other dimensions you may be familiar...