Direct answer A stamping RFQ should include the current controlled drawing, material grade and temper, first-order and estimated annual quantities, finish, and the dimensions that require inspection. Without those inputs, suppliers must make assumptions and their quotes may not cover the same scope.
Start with the custom stamping catalog to identify the product family. Feasibility, process and price still depend on project drawings.
Include these items in the RFQ package
| Item | Details to state |
|---|---|
| 2D drawing | Part number, revision, units, material, thickness, dimensions and tolerances |
| 3D model | Match the 2D revision and state whether the model controls acceptance |
| Material and finish | Grade, temper, plating or coating, masked areas and appearance needs |
| Functional interfaces | Mating holes, contact faces, assembly direction, space and operating environment |
| Quantity and schedule | Sample quantity, first lot, estimated annual use and delivery cadence |
| Quality records | Material certificate, dimensional report, sampling method or customer form |
| Packing and delivery | Scratch and moisture protection, labels, destination and target timing |
Mark datums and critical features
Apply tight tolerances only where fit or electrical function requires them, and identify the measurement datum. ISO 1101 defines the symbol language and rules for interpreting geometrical tolerances. If a drawing uses datums or position controls, state how those features are expected to be checked.
For a formed part, show the inside radius and forming direction; add a flat pattern when useful. If the solid model and 2D print differ, state which document controls dimensions and acceptance.
Separate sample and production scope
Say whether the request covers a prototype, pilot build or repeat production, and whether tooling, plating, inspection and packaging are included. First-lot and annual demand may lead to different process assumptions. Ask the supplier to list exclusions rather than burying unknown items in a single unit price.
Common questions
Can I request an initial quote without a complete 2D drawing?
A dimensioned sketch, 3D model and part function can support a preliminary discussion. The quote should list assumptions and open items. Confirm a controlled revision before order release.
Can a STEP model replace dimensions and tolerances?
A model describes shape, while inspection limits must still be defined. If model-based definition is used, agree the model revision, annotation method and verification rules.
Sources
- ISO 1101 scope for geometrical tolerancing
- ISO/TC 213 scope for product specification and verification
- Protolabs sheet-metal design guide
The cover is an AI-generated stamping RFQ concept, not a Hongchuan quote or engineering drawing.