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Tolerancing, GD&T and machine elements
Nominal geometry is the easy half of a drawing. These guides cover the ISO and ASME systems that define how much variation a feature may carry, how tolerances accumulate across an assembly, and how standard machine elements are specified — with worked numbers and references to the primary standards.
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GD&T Basics for Engineers Who Don't Want to Read the Full ASME Standard
A practical, example-driven walkthrough of geometric dimensioning and tolerancing: the 14 symbols, what datums actually do, and when GD&T is worth the extra drawing complexity versus a plain ± tolerance.
Tolerances in CAD: What AI Tools Usually Get Wrong
The specific ways generative CAD tools mishandle tolerance — from silently defaulting to nominal dimensions to ignoring fit relationships between mating parts — and how to catch it before a part reaches the shop.