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 video, Jason explains when simultaneous requirements apply and how the “separate requirements” note affects inspection, sharing examples that illustrate reasons for using each approach.
In this Question Line video, Jason answers the questions regarding the use of the Unless Otherwise Specified (UOS) statement on a drawing.
Learn how significant figures define unspecified tolerances and how ASME Y14.43 helps determine the required accuracy of measurement equipment.
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 answers a student's question regarding whether a default angular tolerance (found in the Title Block) must be taken into account in addition to the part meeting Rule #1 for it to pass inspection.
In this Question Line video, Jason compares two similar part drawings - one containing the Continuous Feature symbol and the other having a simultaneous requirement for a pattern of features - and discusses how the inspected values would be reported.
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 explains how to measure and report the total profile deviation for an unequally disposed profile control.
In this Question Line video, Jason explains the difference between the related and unrelated actual mating envelope and walks through an example drawing to explain when and how they are used to inspect a feature.
In this Question Line video, Jason walks through a few examples to show us the difference between profile of a surface with and without datums referenced in the feature control frame and how that affects the reported deviation.
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.
Jason reviews the effects of tight position controls on features that relate to datum features with much larger form tolerances.
Jason explains how datums are qualified and the difference in how CMMs and physical datum simulators set up the datum reference frame.
In this Question Line video, Jason shows how to fine the zero, or origin, for a given feature control frame.
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 discusses size dimensions to avoid with stepped surfaces and how datums and profile eliminate ambiguous dimensioning.
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.
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 answers a question about reverse inspection of orientation and walks through an example to explain why you should not deviate from the inspection criteria given in the feature control frame.
In this Question Line video, Jason discusses manual vs CMM inspection and the reporting requirements of the ASME Y14.45 standard (Measurement Data Reporting standard).
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.
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 Question Line video, Jason discusses a composite feature control frame controlling profile tolerance. He walks through through the user submitted examples to explain the controls of each frame.