BlueprintExercises

GD&T

Geometric dimensioning and tolerancing controls shape, orientation and location, not just size. Learn to read it here. Pick ASME Y14.5 (US) or ISO GPS (Europe) in any exercise.

4 lessonsPractice testASME Y14.5 ยท ISO GPSCertificate with Pro

Your progress

0 of 5 doneStart lesson 1
  1. 1

    GD&T symbols

    The 14 geometric characteristics, what they look like, and which need a datum.

  2. 2

    Reading a feature control frame

    Characteristic, tolerance zone, modifier and datums, read left to right.

  3. 3

    MMC, LMC and bonus tolerance

    Maximum and least material condition, and how much extra position tolerance a part gets.

  4. 4

    Work out bonus toleranceHarder

    MMC size, bonus and total position tolerance, typed instead of picked.

  5. Practice test20 questions

    Mixed questions from every lesson. Use it to check what you know.

Reference