CAD prep.
Mfg-ready files.
Production CAD.
CAD file preparation reference for manufacturing. Watertight geometry, format export, tolerance specification, manufacturing notes. Production-ready CAD.
Key principles.
No gaps
Solid bodies must be watertight. Required for machining.
Standard formats
STEP AP242 most universal. IGES for legacy.
Per feature
GD&T or ± per ISO 2768. Default tolerance class.
On drawing
Material grade per AMS, ASTM, or proprietary.
Per ISO 1302
Surface finish symbols per ISO 1302.
Process specifics
Heat treat, plating, special instructions on drawing.
FAQ
Best CAD format?
STEP AP242 most universal. Preserves PMI. Cross-platform compatible.
What is "watertight"?
Solid model with no missing faces, no gaps, no overlapping surfaces. Required for machining.
GD&T vs ± tolerance?
GD&T more functional. ± tolerance simpler. We accept either.
CAD review service?
Yes — every quote includes free DFM review. Identifies issues before manufacturing.
Native CAD format?
Solidworks, Inventor, Fusion 360 supported. STEP recommended for cross-platform.
Drawing required?
Recommended for complex parts. CAD model alone OK for simple geometry.
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