Written by a mechanical engineer, for mechanical engineers
You spend your days between the drawing and the part: tolerances that have to close, threads that have to engage, a surface finish that has to pass inspection. These designs come from the same work, drawn by an engineer who still does it full-time. If you have to explain the joke, it isn't on this page.
Pick your callout
Rough Day puts a Ra 12.5 symbol on a bad day. Ra 3.2 vs Rz 16 is for you if you've had to explain why those two numbers aren't interchangeable. Tolerance ±.0002" MMC and Low Tolerance Club are for the GD&T people. Thread Direction Agnostic is for anyone who has fought a left-hand thread. Stacking Tolerances is the stack-up nobody signed off on, and CAD Crash Cycle is your week in four words: extrude, fillet, assemble, crash.
Tees, hoodies and mugs
Most tees are soft combed ring-spun cotton. The hoodies are eco raglans in organic cotton and recycled polyester with a brushed fleece inside. Many designs also come in a women's cut and as an 11 oz ceramic mug for the desk next to the CAD station.
FAQ
Are the references right?
They're checked against the standards they quote. The Shop Floor blog goes deeper: Ra vs Rz, GD&T explained and left-hand vs right-hand threads.
How do they fit?
Each product page has its own size chart, because unisex, women's and hoodie cuts differ. Between sizes? Find Your Fit walks you through it.
Buying for a mechanical engineer?
Match the design to what they actually do: surface finish for the shop floor, GD&T for design and quality, CAD for the designer. More ideas in Gift an Engineer.
