Xometry

On-demand manufacturing marketplace for CNC machining, sheet metal, injection molding, 3D printing, and casting. The quoting engine is a useful DFM reality check — upload a STEP and get instant pricing at qty 1–1000.

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Hacksmith Industries

Engineering and fabrication studio that builds real-world versions of fictional technology. Deep content on CNC machining, waterjet cutting, metal fabrication, and high-tolerance part production. Useful reference for understanding what advanced making looks like at production scale.

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NYC CNC

John Saunders runs one of the best CNC machining education resources on the internet. Covers Fusion 360 CAM, fixturing, feeds and speeds, workholding, and real shop-floor decision-making for short-run production.

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This Old Tony

Manual machining and metalworking education with exceptional explanatory clarity. Tony covers lathes, mills, threading, and tooling from first principles. Essential for understanding what CNC automates and why tolerances matter.

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