Pillar guide
DFM Design Guide: 10 Rules for CNC-Machined Parts
Wall thickness, fillets, draft, hole depth, thread relief, tolerance stack-up and file preparation — each rule written as “the problem, then what to draw instead”.
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Read this before you send the file
Written by the engineers who review drawings, not by a content team. No gated PDFs, no newsletter wall — if it is useful, it is on the page.
Pillar guide
Reference notes
Short reads, specific answers
Each note answers one question an engineer asks during a review, with the numbers attached.
Tolerancing 01
ISO 2768 Tolerance Chart: m & f Grades
The full ISO 2768 tolerance chart for m and f grades, what each class covers, and how to call out exceptions without over-tolerancing your prototype drawing.
Read the note Material selection 02
Best Material for a Prototype: Plastic vs Metal
How to choose the best material for a prototype: what the part must prove, where plastic wins against metal, and where the cost crossover usually sits.
Read the note 3D printing 03
SLA vs SLS vs FDM: Which 3D Printing Process?
SLA vs SLS vs FDM compared for prototype work: surface finish, toughness, minimum wall and lead time — then pick the right 3D printing process in four questions.
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