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A clear request for quote helps your machining partner understand the part, its purpose, and the requirements that matter most. Here’s what to send before production begins.
You have a part design and need a CNC machining quote. What information should you include?
A CAD file gives a manufacturer the part’s geometry, but it may not tell the whole story. Material, quantity, critical dimensions, finish, and inspection requirements can all affect how a part is made and quoted. Sharing those details at the start helps the machining team review your project and identify questions early.
Use this checklist when preparing your next CNC machining request for quote (RFQ).
Things to Include
1. A current 3D CAD model
Start with the latest version of your part model. The machining team uses it to review the geometry, identify features, and consider how to produce the part.
Give your files clear names and revision numbers. If you changed a hole location or wall thickness after an earlier discussion, make sure the model you submit reflects that change. When you’re quoting multiple parts in an assembly, identify each part and its required quantity.
Before sending the file, check that it opens correctly and represents the version you want quoted. An outdated model can lead to avoidable questions or a quote for the wrong design.
2. A drawing that identifies critical requirements
A 3D model shows the shape of the part. A 2D drawing can communicate requirements the model alone may not make clear, including:
- Critical dimensions and tolerances
- Threads and threaded inserts
- Datum references and geometric tolerances, when applicable
- Surface finish requirements
- Material and treatment notes
- Inspection or documentation requirements
You do not need to apply the tightest possible tolerances to every feature. Identify the dimensions that control fit, alignment, movement, or sealing, and explain their purpose. That context helps the machining team evaluate the requirements and discuss alternatives where appropriate. For a deeper look at this decision, see our guide to CNC machining tolerances and costs.
Make sure the model and drawing shows the same revision. If they conflict, clarify which file govern before requesting a quote.
3. The material and any approved alternatives
Specify the material your part requires, including the grade or alloy where it matters, for example. “aluminum” leaves more room for interpretation that a named alloy and temper.
If your team has flexibility, say so. You might need a particular material to meet strength, weight, corrosion resistance, or operating temperature requirements. In other cases, you may be open to alternatives that suppose the same function.
Include any required material certifications or traceability in the RFQ. Those requirements can affect sourcing, documentation, and the quote.
4. The quantities you need
Quantity affects how a manufacturer plans a job. A single prototype, small validation run, and recurring production orders may call for different approaches to the setup, workholding, and scheduling.
Tell the team:
- How many parts you need for the first order
- Whether you expect additional orders
- Your estimated annual volume, if known
- Whether you want pricing at several quantity levels.
If you are still testing the design, say that too. It gives the team context for the project’s current stage and any transition to production.
5. Finishing and appearance requirements
What should the finished part look like, and will its surfaces function?
List any required treatments or finishes, along with the surfaces they apply to. If a particular face will be visible to a customer, identify it. If a surface must mate with another component, explain that requirement as well.
Be specific about whether dimensions apply before or after a finishing process. Some secondary operations can affect final dimensions, so the machining and inspection plan should account for them from the start.
6. Inspection and quality documentation
If your project requires an inspection report, material certificate, first article documentation, or another deliverable, include it in the RFQ. State which dimensional, include it in the RFQ. State which dimensions or features need verification and whether your organization has a required format.
Fore regulated or tightly controlled projects, share applicable quality and documentation requirements early. This lets the manufacturer assess the full scope of work rather than the part geometry alone.
7. Your target date and project context
Include your registered delivery date and explain what drives it. Do you need parts for a design review, a functional test, an assembly build, or a production schedule?
A target date helps the team assess timing. Project context helps them understand which requirements are essential. If your schedule or specifications have some flexibility, note that in the request.
A Simple CNC Machining RFQ Checklist
Before submitting your project, confirm that you have included:
- The current 3D CAD Model and revision
- A matching drawing and revision
- Material specifications
- Order quantity and expected future volumes
- Critical dimensions, tolerances, and threads
- Finish and appearance requirements
- Inspection and documentation needs
- Your target delivery date
- A short explanation of how the part will be used
You may not have every answer yet, Identify what is still undecided so the machining team can discuss it with you during the review.
Start the Conversation with Uptive
A useful CNC machining RFQ give the manufacturing team enough information to evaluate the part as a whole. It also creates an opportunity to resolve design questions before they affect the schedule.
Uptive supports CNC machining projects from prototypes through production. When you’re ready, submit your project with the files and requirements you have available.