Tolerance, explained: video guides
Short narrated walkthroughs of tolerance stack-ups, ISO 286 fits and ISO 2768. Each video has a written guide with chapters and the full transcript, so you can read instead of watch. The videos are in English.
How to Do a Tolerance Stack-Up: Step by Step With a Real Example
How to do tolerance stack up analysis, step by step, with a real example: a lid gap that must stay between 0.10 and 0.80 mm. Define the requirement, draw the loop, assign signs, sum the nominals, calculate worst case and RSS, rank the contributors, and fix the biggest one. A repeatable tolerance stack up tutorial for mechanical design engineers.
In this video
Worst Case vs RSS Tolerance Stack-Up: Same Parts, Different Verdict
A four-part tolerance stack passes with RSS and fails worst case. Which one do you trust? We work both methods on the same simple assembly (ISO 2768-m general tolerances), explain the 99.73% assumption behind RSS (root sum square), show when it misleads, and finish with a clear rule for choosing between them — plus three ways to fix a stack that fails.
In this video
H7/g6 Fit Explained: ISO 286 Hole and Shaft Tolerances, Step by Step
What does Ø25 H7/g6 mean on a drawing? This h7 g6 fit explainer decodes the ISO 286 letters and numbers (hole basis, fundamental deviation, IT grade), works out the h7 g6 tolerance and clearance step by step at Ø25 and Ø40, compares it with h6, f7, k6 and p6, and gives a simple way to choose a preferred fit from how the joint has to work.
In this video
Press Fit Tolerance: H7/p6 vs H7/s6 With Real Interference Numbers
How tight should a press fit be? We read press fit tolerance straight from ISO 286: H7/p6 and H7/s6 on a 25 mm shaft, worked step by step into real interference numbers in microns, then compared with k6 and r6 on one tolerance-zone diagram. Plus what the fit letters don't tell you (hub material, temperature, surface finish, press force) and a simple rule for choosing an interference fit.
In this video
ISO 2768-mK Explained: What the Title-Block Tolerance Really Allows
What does "ISO 2768-mK" in a title block actually allow? We decode the m and K classes, read the ISO 2768 tolerance chart on a real bracket (linear, radii, chamfers, angles), look at K-class flatness and straightness, compare f, m and c, and explain when to write an explicit tolerance instead. Plus why general tolerances quietly drive tolerance stack-ups.