Deep dive
FDM holes print about 0.25 mm undersized in the one test that discloses its method
CNC Kitchen measured FDM holes 0.25 mm undersized with a disclosed method. SLS, MJF and SLA numbers in circulation are mostly vendor design-guide claims.
Technology basics
How the main printing processes differ on cost, strength, detail and lead time.
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Deep dive
4.2 mm in CAD keeps 90% of an M3 insert's pull-out strength, CNC Kitchen finds
CNC Kitchen pulled nearly 50 M3 inserts out of PLA across a 3.6-4.6 mm hole sweep. 4.2 mm in CAD holds about 90% of the roughly 1,400 N peak.
FDM vs SLA vs SLS vs MJF: a plain-language comparison
The four most common 3D printing technologies offered by online print services, compared on cost, strength, detail, and what each is actually good for.