The short answer
A machining RFQ should be complete enough that a good supplier can quote without sending three clarification emails. That means geometry, material, finish, quantity, timing, and quality requirements all need to be visible from the start.
The core package
Send the 3D model and the 2D print when both exist. Include part number, revision, quantity, material specification, finish specification, and required lead time. If the part is export-controlled, regulated, or tied to a customer flowdown, say that early instead of burying it later in the process.
Most bad RFQs fail on these basics, not on anything sophisticated.
The commercial details suppliers need
A one-piece prototype and a recurring 500-piece release are not the same buy. Say whether the RFQ is prototype, bridge, or production. Add annual demand if known. Tell the supplier whether alternates are welcome and whether domestic-only manufacture matters.
These are commercial signals that change the process route, not just commercial decoration.
The quality details that move price
FAI, certs, traceability, outside-process restrictions, approved special processors, packaging rules, and report formats all change cost and lead time. Mention them before the quote. Adding them after award is how buyers create fake savings and real resentment.
A clean RFQ is not just technically complete. It is honest about downstream requirements.
Why this checklist improves response rate
Suppliers respond faster when they can classify the job quickly, see that the buyer is organized, and understand the likely path to award. Related reading: Engineering drawing best practices for machined parts and Machining lead time factors: what actually sets delivery dates.
Clear RFQs get better quotes because they lower interpretation risk on the supplier side.
Comparison table where relevant
| RFQ item | Why it matters | Common miss |
|---|---|---|
| Revision-controlled print/model | Defines the actual geometry | Old or mixed revisions |
| Material and finish | Drive route and cost | Only naming generic material |
| Quantity and demand profile | Changes economics | No volume context |
| Quality package | Changes inspection and documentation | Added after quote |
How to specify this in your RFQ
Put the revision, quantity, material, finish, cert requirements, and target delivery date in the body of the email, not only in attachments. Suppliers skim. Make the must-haves impossible to miss.
Have a part that needs quoting? Email your drawings to rfq@precisionmachining.co - we return a competitive quote within 24 hours. Phone: +1 312-579-0808.