Ordering custom machined parts has never been easier thanks to online CNC machining services, but the speed of your quote depends just as much on the information you provide as it does on the quoting platform itself.
A complete RFQ helps manufacturers understand your project from the start, reducing follow-up questions and allowing your parts to move into production sooner. Whether you’re ordering a prototype or preparing for production, knowing what to submit can save valuable time.
Start with a Complete CAD Model
The first step toward a fast quote is providing a complete 3D CAD model. It allows the manufacturer to evaluate your part geometry, machining complexity, and material requirements accurately.
Whenever possible, upload a STEP file, as it is one of the most widely accepted formats for manufacturing. PartsBadger also supports many native CAD file types, making it easy to submit designs directly from your preferred software.
A complete CAD model gives the quoting team the information needed to evaluate your project without requesting additional files.
Include the Information Every Machine Shop Needs
Even the best CAD model doesn’t tell the entire story. To receive an accurate quote, include the manufacturing requirements that affect pricing and production.
Material
Specify the exact material whenever possible. Instead of simply listing “aluminum,” identify the alloy, such as 6061 or 7075, if your design requires a specific grade.
Check out our materials guide to learn how to specify them.
Quantity
The number of parts influences machining strategy, setup time, and cost. Whether you need one prototype or a production run, providing an estimated quantity helps generate a more accurate quote.
Surface Finish
If your part requires anodizing, passivation, powder coating, plating, or another finish, include that information in your RFQ. Finishing operations can affect both manufacturing workflow and lead time.
Learn more about surface finishes.
Critical Requirements
If your project requires certifications, inspection reports, or other documentation, include those requirements when submitting your files. These items are typically added based on the customer’s specifications rather than included by default.
When Is a Drawing Required?
Many parts can be quoted using only a 3D model, but a manufacturing drawing is recommended whenever important information cannot be communicated through the CAD file alone.
This may include:
- Thread specifications
- GD&T callouts
- Critical tolerances
- Surface finish requirements
- Inspection notes
- Manufacturing instructions
Providing this information upfront reduces unnecessary communication and helps prevent revisions later in the quoting process.
Why Some Quotes Require Engineering Review
Some online CNC machining services can provide pricing almost instantly, while others require a manual engineering review before a quote can be completed.
Projects are more likely to require additional review when they include:
- Tight tolerances
- Complex geometries
- Exotic materials
- Specialized coatings
- Heavy or unusually large parts
- Advanced GD&T requirements
These reviews help ensure the manufacturing approach, pricing, and lead time accurately reflect the complexity of the project.
Common RFQ Mistakes That Cause Delays
Many quoting delays are avoidable. Some of the most common include:
- Uploading only a PDF without a 3D model
- Omitting the material specification
- Not providing the expected quantity
- Leaving surface finish requirements undefined
- Missing supporting documents or engineering notes
- Uploading outdated file revisions
Taking a few extra minutes to review your submission can eliminate unnecessary back-and-forth.
A Quick Checklist Before You Upload
Before requesting a quote, confirm that you have included:
- A complete 3D CAD model
- Material specification
- Production quantity
- Surface finish or coating requirements
- Manufacturing drawing, when applicable
- Critical tolerances and GD&T callouts
- Required certifications or inspection documentation
A complete submission allows manufacturers to review your project more efficiently and helps keep the quoting process moving.
Final Thoughts
By providing complete project information, you help online CNC machining services evaluate your design more efficiently, reduce unnecessary communication, and move your project toward production sooner.
Whether you’re sourcing a single prototype or planning a production run, a well-prepared RFQ saves time for both your team and your manufacturing partner.
Ready to get started?
Upload your CAD files and project requirements to receive a fast, accurate quote from an experienced team that makes ordering custom CNC parts simple.
