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How to Prepare a CAD File for Fabrication | Birl’s Light Fab

How to prepare a CAD file for fabrication

The fastest quotes come from files that clearly communicate intent. This checklist keeps your quote accurate and prevents avoidable back-and-forth.

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Best file formats

  • 3D parts/assemblies: STEP is a strong default for interoperability.
  • Flat patterns: DXF (or DWG) for cut geometry, plus a PDF drawing for callouts.
  • Reference: A PDF with dimensions can be enough to start for simpler parts.

A quote-ready checklist

  • Revision: include a revision label and date so everyone references the same file.
  • Material: specify alloy/type and thickness (or ask for recommendations).
  • Quantity: prototypes vs repeats affect pricing and planning.
  • Critical features: flag what must be tight and why (fit, alignment, sealing).
  • Finish: paint/powder/raw, and whether the part is indoor/outdoor/coastal.
  • Mounting intent: surface type, fasteners, standoffs, and access constraints.
  • Hardware: inserts, studs, countersinks, and weld nuts should be called out.
Laser cutting CNC machining Sheet metal

Need precision machining with tight tolerances? Request a quote.

Send your PDF + CAD, and highlight the fit-critical interfaces. We’ll confirm feasibility, inspection intent, and next steps.

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Linking your file to the real install

If the part interfaces to an existing structure, photos help. If it mounts to a surface, the surface type matters. If it’s outdoors, exposure matters. The goal is to align fabrication with reality.

Laser vs CNC machining

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CAD File Prep FAQ

What is the best file format to send for a fabrication quote?

For machined parts or assemblies, PDF + STEP is a strong default. For laser-cut profiles, PDF + DXF is often best. The PDF should define material, quantity, timeline, and any critical-to-function dimensions.

Do I need both CAD and a drawing?

CAD helps with geometry, but the drawing (PDF) communicates intent: tolerances, notes, finishes, and which interfaces are critical. Providing both typically leads to faster, more accurate quoting.

What information do you need for a fabrication quote?

The fastest quotes come from a drawing or CAD export plus a few key details: material (or environment/use-case if undecided), thickness/size, quantity, timeline, finish requirements, and any critical-to-function dimensions or tolerances. If a part interfaces with existing equipment, include notes or reference dimensions that drive fit.

Send your CAD file or project details and we’ll review the best approach.

Upload a PDF + STEP/DXF, include material, quantity, timeline, and highlight critical features. We’ll respond with clear next steps.

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Ready to get started? Send your drawings, CAD files, or project details and we’ll review the best approach.

Upload PDF + STEP/DXF, include material, quantity, timeline, and any tolerance or finish requirements. We’ll respond with clear next steps.

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