Articles related to design concepts or application of GD&T to engineering prints
In this Question Line video, Jake discusses common causes of conflicting basic dimensions between a 3D model and 2D drawing and how to to investigate the source of the mismatch.
In this video, Steve identifies first angle and third angle projection symbols and demonstrates how each projection method translates the 3D model into its corresponding 2D views.
In this Question Line video, Jason walks through two examples of composite profile with unequally disposed tolerance zones, discussing why and when they should be used and explaining how the zones interact to control location, orientation, and form.
In this Question Line video, Jason explains how the LMC modifier impacts position tolerance, minimum wall thickness, and assembly clearance.
In this Question Line video, Jason demonstrates how basic dimensions paired with profile of a surface create clearer, more functional surface control.
Learn why Bonus Tolerance at MMC offers little benefit on threaded holes as Jason explains how MMC works and how bonus tolerance is applied.
Jason explains how chamfers and edge breaks are dimensioned and what tolerances apply under ASME standards when none are specified in the field of view.
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.
Learn how to control position of an interrupted hole by treating it as a single feature or as separate features with simultaneous requirements.
Jason reviews a bad drawing and explains each error, showing how it conflicts with ASME Y14.5 requirements.
In this Question Line video, Jason explains how to properly dimension the usable depth of an internal thread and reviews methods for checking it on a part.
Jason explains how multiple features can be used to create a single datum on a part and why it’s done.
In this Question Line video, Jason demonstrates how the from-to modifier can be applied to create a wedge-shaped tolerance zone for tapered surfaces.
In this Question Line video, Jason reviews a simple part assembly to show how geometry and form factor into the tolerance stack-up analysis.
Jason compares three profile tolerancing methods and explains which option he would recommend.
In this Question Line video, Jason reviews a submitted drawing, explaining the difference between flatness and parallelism, and gives options on how to tolerance the drawing based on what is critical to the design.
In this Question Line video, Jason reviews a submitted weldment drawing and demonstrates how to calculate the position tolerance needed for a zero-clearance fit in the worst-case assembly scenario, ensuring that the shaft can pass through two coaxial holes.
In this Question Line video, Jason explains how an irregular feature like a hexagon can serve as a primary datum feature and discusses how this part could be inspected – touching on gage design for manual inspection and point cloud analysis using a CMM.
Jason discusses how to control a repetitive pattern of features to a central datum using a “#X INDIVIDUALLY” note with a datum feature.
Jason walks through tolerance analysis for a profile control and shows how the feature control frame defines the location and orientation of the tolerance zone.
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 compares flatness applied to a feature of size with flatness applied to a surface.
In this Question Line video, Jason introduces ASME Y14.8 and explains how to apply + or - DRAFT to size dimensions, using examples to show how to find and handle tolerances for draft features.
In this Question Line video, Jason explains how to calculate the flatness tolerance of a surface for a given example based on the size tolerances and Rule #1.
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.
In this Question Line video, Jason discusses applying tolerances to fillets and rounds, explaining why applying profile of a surface allows more direct control of the size and form than using +/- tolerances.
In this Question Line video, Jason discusses a user submitted drawing, explaining options for controlling profile of a pattern of surfaces.
In this Question Line video, Jason discusses the ISO Unequal Zone (UZ) modifier, which is similar to the Unequally Disposed modifier of the ASME standard. He walks through an example where the UZ modifier is included in a feature control frame controlling profile of a surface and discusses how this impacts the tolerance zone.
In this Question Line video, Jason discusses the positional control of the X, Y, and Z translations for a cylindrical post on the submitted drawing. He defines the datum reference frame and zero point of the part and explains why the feature control frame in question is essential to constraining where the cylinder exists vertically.
In the Question Line video, Jason walks through two examples to show the design difference between Profile of a Line and Profile of a Surface.
In this Question Line video, Jason shows how to fine the zero, or origin, for a given feature control frame.
In this Question Line video, Jason reviews how Rule #1 controls the size and form of a feature of size, and what this means for ring gage design and inspection reporting.
In this Question Line video, Jason discusses how datum targets, datum reference frames, and multiple datum structures can be of assistance in casting drawings.
In this Question Line video, Jason reviews a user-submitted symmetric part drawing, explains what is incorrect, and shows how to fix it under ASME Y14.5.
In this Question Line video, Jason discusses reliable datum features. He explains that unreliable datum features can be avoided by following the functional intent of the part and walks through two drawing examples to explain the thought process behind selecting datum features.
Brandon walks through examples of surface straightness and derived median line straightness, explaining correct application and inspection considerations.
Brandon explains DMP flatness, its potential issues when used on stacking parts, and an alternative method for controlling flatness on these parts.
In this Question Line video, Jason answers questions regarding datum targets and applying flatness and profile of a surface.
In this Question Line video, Jason reviews a drawing example to explain when Maximum Material Condition and Maximum Material Boundary modifiers may be applied.
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.