What Information Buyers Should Include in a CNC RFQ

A large percentage of CNC quoting delays happen because buyers send incomplete RFQs. The supplier may know how to machine the part, but the quote still gets delayed if the request is missing key information about material, quantity, tolerance, or finish.

If you want faster, more accurate CNC quotations, these are the details you should include in every RFQ.

1. A clear drawing or 3D file

The most important item in an RFQ is the technical file. Ideally, you should send:

• a 2D PDF drawing
• a 3D STEP, STP, or IGES model

If you do not yet have a full CAD package, send a sketch, marked-up image, or early concept description. A complete drawing is best, but an early review is still better than no review at all.

Related article: How to Prepare CAD Files for CNC Machining RFQ

2. Material specification

Your supplier cannot quote accurately without knowing the material. Different materials affect machining time, tool wear, sourcing time, and finish options.

Examples:

• Aluminum 6061 or 7075
• Stainless Steel 304 or 316
• Titanium Ti-6Al-4V
• POM / Delrin
• Nylon or PEEK

Relevant pages:

• Aluminum CNC Machining
• Stainless Steel CNC Machining
• Titanium CNC Machining

3. Quantity and project stage

A quote for 1 prototype part is very different from a quote for 500 production pieces. Always state:

• sample quantity
• expected batch quantity
• whether the part is still under development
• whether future repeat orders are likely

This helps the supplier choose the right process and pricing logic.

4. Tolerance requirements

Not all dimensions need the same level of control. If certain features are critical for fit, sealing, movement, or assembly, make that clear in the RFQ.

Related guide: CNC Machining Tolerance Guide for Buyers

5. Surface finish and special requirements

If the part needs anodizing, passivation, plating, bead blasting, powder coating, testing, or special packaging, include that in the RFQ. Finish and post-processing can affect both quote and lead time.

6. Delivery target and shipping terms

If you have a deadline, say so early. Also mention if you prefer FOB, CIF, DDP, or if you want the supplier to recommend shipping options. This helps suppliers quote more realistically.

7. The buyer’s goal for the part

A supplier can often help more if they understand what the part actually does. You do not need to reveal confidential details, but simple context helps:

• prototype validation
• assembly fit check
• end-use production part
• industrial, robotics, medical, or aerospace use

Related pages:

• Aerospace CNC Parts
• Medical Device Components Machining
• Robotics CNC Parts

8. Final advice for buyers

A complete RFQ does not need to be complicated. It just needs to be clear. Good files, material, quantity, tolerance, finish, and timing information are usually enough to improve quote quality and reduce unnecessary back-and-forth.

Ready to send yours? Submit your CNC RFQ here.