Start with the Drawing File and Revision
Provide drawings that clearly communicate dimensions, geometry and technical requirements, and identify the current revision. If both 2D drawings and 3D models are supplied, state which controls dimensions and tolerances to avoid revision conflicts.
List critical sheets, detail views, technical notes or internal part numbers in the RFQ. Any later revision should trigger a review of affected material, machining and quotation conditions.
State Material, Temper and Supply Responsibility
State the material grade and required temper. If temper is not decided, mark it for confirmation rather than leaving the machinist to guess. Match dimensions to the material form: plate thickness, width and length; bar diameter and length; extrusion section and length.
Also state whether the customer supplies material, Huajing provides blanks only, or material and CNC are required together. This affects blank confirmation, allowance responsibility, scheduling and delivery scope.
Quantity Defines the Manufacturing Stage
State the requested quantity and whether it is a prototype, pilot run, batch order or long-term supply. Prototype work focuses on validation; batch work also requires stable material, process coordination, inspection and packaging.
If later volume may change, separate the current RFQ quantity from the expected stage and avoid presenting an uncertain forecast as a commitment.
Identify Critical Dimensions, Tolerances, Holes and Threads
Not every dimension needs the same control. Identify dimensions affecting assembly, location, sealing, motion or appearance and show the relevant tolerances and datums. Hole location, depth, counterbore, chamfer, thread and effective depth should be clear.
Identify surfaces that must not be marked, protected datum faces and restricted clamping areas. These details affect process planning and inspection.
Complete Finish, Appearance, Inspection, Packaging and Delivery Requirements
State the finish type, color or appearance direction and identify areas to be treated or protected. For appearance parts, define the surfaces requiring special attention.
Inspection requirements should correspond to critical dimensions and acceptance criteria. Packaging should address part-to-part damage, contamination and transport protection. State whether the target date is for samples, a complete batch or staged delivery.
Quick RFQ Checklist
- Material: grade, temper and supply responsibility.
- Blank: key dimensions for plate, bar, tube, flat bar or extrusion.
- Quantity: current prototype, pilot, batch or long-term quantity.
- Drawing: clear file, revision and dimensional authority.
- Critical tolerances: assembly, location, holes, threads and datums.
- Finish: treatment, color, appearance surfaces and protected areas.
- Delivery: inspection, packaging, target date and staged delivery.
Drawing Confidentiality and Follow-up
Review the drawing confidentiality notice before submitting. Leave at least a phone or WeChat contact and summarize material, quantity and machining scope so follow-up stays on the same revision.