Buyer question guide

How to Prepare a Custom Metal Parts RFQ

A useful request for quotation helps a manufacturer judge the part, the quantity, the quality requirements and the delivery plan against the same revision. You do not need every answer before making contact. You do need to identify what is known, what is estimated and what still needs engineering review.

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1. Describe the part and its job

Start with the assembly or equipment where the part will be used. Explain its function, mating parts, working environment and any failure that must be prevented. A supplier can review a drawing more accurately when it understands which surfaces, interfaces and loads matter. If the project is confidential, share only the level of application detail your team permits.

2. Identify the exact design revision

Attach a readable 2D drawing with its revision and date. If available, include a STEP or other 3D model; a physical sample or clear photographs can help when drawings are incomplete. State which file controls if the drawing and model disagree. Do not let a supplier guess whether an older revision is still valid.

If you have no finished drawing, list the critical dimensions and interfaces, provide a sample if possible, and ask for a feasibility discussion before treating any price as firm.

3. Separate fixed requirements from open choices

Specify the material grade, finish, heat treatment, corrosion exposure and any required standard when they are fixed by the design. If an equivalent material or process is acceptable, say so explicitly. Highlight critical tolerances and inspection characteristics; a blanket “tight tolerance” instruction does not tell a supplier what to measure or why.

For process-specific questions, see the Crossland pages on CNC machining, sheet metal fabrication, casting parts and manufacturing process selection. The appropriate route still depends on the actual drawing, volume and quality requirements.

4. Give quantities and timing as ranges when needed

Separate prototype quantity, first production order and estimated repeat demand. State whether the number is a commitment or a planning estimate. Provide the date you need a quote, sample and production shipment, along with the delivery country or location. These details affect tooling, process choice, inspection planning, packaging and logistics.

5. Make the quality package explicit

Tell the supplier what evidence you need with the parts: for example, dimensional results for named features, material certificates, finish records, sample approval or traceability. Identify the acceptance criteria and who approves the first sample. If a test method is important, include it in the RFQ rather than assuming it is included in every quotation. See testing and inspection for the types of checks discussed on this site.

6. Compare quotations on the same basis

When quotes arrive, check the quoted drawing revision, unit price and quantity break, tooling or setup charges, sample terms, lead time, inspection scope, packaging and delivery terms. Record every assumption or proposed deviation. A lower unit price is not directly comparable if one quote excludes tooling, testing or shipping that another includes.

What happens next?

Use this checklist to prepare a consistent request, then share the information your organization can release. Crossland can review the supplied requirements and discuss feasibility; manufacturing route, capability, price and lead time must be confirmed for the specific part and revision. If you need help clarifying a drawing or process choice first, see design and simulation or send a technical question.

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