Topic ยท 4 lessons
GD&T
Geometric dimensioning and tolerancing (GD&T) is the drawing language that says how accurate each feature of a part must be and how it will be checked. These lessons follow one fictional part, the AH-101 mounting bracket, from a plain drawing to full feature control frames.
Lessons
- Lesson 1 of 4 ~13 min read
Reading engineering drawings
You'll be able to find the part number, revision, material, units and default tolerances in a title block in under a minute.
Started
- Lesson 2 of 4 ~13 min read
Datums and the datum reference frame
You'll be able to tell a datum feature, its datum feature simulator and the datum apart on a real part and its inspection setup.
Started
- Lesson 3 of 4 ~13 min read
The feature control frame
You'll be able to name every compartment of a feature control frame and say what each one tells you, reading left to right.
Started
- Lesson 4 of 4 ~13 min read
Form and orientation controls
You'll be able to describe the tolerance zone for flatness, straightness, circularity, cylindricity, perpendicularity, parallelism and angularity.
Started
Related tools
No GD&T calculators yet. See the calculators page for what's coming.