How to Read a GD&T Feature Control Frame | GD&T Lesson 2

A feature control frame is a sentence written in boxes. In this lesson we read it box by box, meet the 12 GD&T symbols in their 5 families, and then read five real frames on our pump housing drawing. You will learn: The three questions every frame answers: what, how big, from where When the tolerance zone is a cylinder and when it is two planes What the M and L modifiers are for Why the order of the datums matters The 5 symbol families: form, orientation, location, profile, runout Why concentricity and symmetry were removed in ASME Y14.5-2018 Leader on a surface vs frame under a size dimension: surface or axis? Chapters: 0:00 Homework answer from Lesson 1 0:28 The housing drawing 0:43 Anatomy of a feature control frame 2:08 12 symbols in 5 families 3:28 Five frames on the housing, read one by one 5:44 Surface or axis? Where the frame is attached 6:14 Recap and homework Homework: write each of the five frames on the housing drawing as one plain English sentence. Share your best one in the comments. Previous lesson: Why ± Tolerances Fail Full course (GD&T, fits and tolerance stack-up on one real part): UDEMY APQP, FMEA & PPAP case study series:    • From RFQ to PPAP: APQP for Die Casting (Fu...   Connect on LinkedIn:   / tuncay-kamas-860229259   #GDT #FeatureControlFrame #MechanicalEngineering