Key principles.
Standard formats
STEP AP203/214/242 most universal. IGES for legacy. Native formats sometimes acceptable.
No gaps
Solid bodies must be watertight (no gaps). Surface bodies need careful inspection.
Per feature
GD&T or ± tolerances on critical features. Default ISO 2768-m for general.
Specify on drawing
Material grade per AMS, ASTM, or proprietary spec.
Per ISO 1302
Surface finish symbols per ISO 1302 or ASME Y14.36.
Heat treat, plating
Heat treatment condition. Plating type and thickness. Per drawing.
FAQ
STEP AP242 most universal — preserves PMI (product manufacturing information). STEP 214 standard. IGES for surface models.
Solid model with no missing faces, no overlapping surfaces, no gaps. Required for proper machining.
GD&T more functional — defines feature relationships. ± tolerance simpler. We accept either.
Drawing recommended for complex parts. CAD model alone OK for simple geometry. Drawing clarifies tolerance/finish intent.
Solidworks (.sldprt), Inventor (.ipt), Fusion 360 supported. STEP recommended for cross-platform.
Yes — every quote includes DFM review. We identify issues before manufacturing starts.
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