A supplier can quote from limited information, but the result may be based on assumptions that later change tooling, materials or inspection effort. The goal of a good RFQ is not simply to send more files. It is to make the intended function and acceptance conditions visible.
1. Start with the part geometry
Send the latest available 2D drawing, 3D file or physical sample. Mark the revision clearly. If only a sample is available, explain whether it represents the target design or an existing part that needs to be reproduced or improved.
- Identify critical sealing or mating surfaces.
- Mark dimensions that affect assembly and function.
- Separate reference dimensions from inspection dimensions.
- State whether flash, gate marks or parting lines are restricted in specific areas.
2. Describe the real operating environment
Material selection depends on what the component experiences in use. A part that looks like a simple gasket may face heat, compression, cleaning chemicals, fuel, oil, outdoor weathering or repeated movement.
- Minimum and maximum operating temperature
- Continuous or intermittent exposure
- Contact media and cleaning agents
- Pressure, compression, vibration or repeated flexing
- Indoor, outdoor, food-contact or medical-device direction
3. Give a material direction without hiding uncertainty
If the material is fixed, include the compound family, hardness and applicable specification. If it is not fixed, describe the functional conditions and ask for an engineering recommendation. This is more useful than selecting a familiar rubber type without confirming its fit.
4. Separate critical tolerances from general tolerances
Rubber and silicone parts behave differently from machined metal parts. Focus attention on the dimensions that control sealing, assembly and movement. A drawing with every dimension treated as equally critical can add unnecessary tooling and inspection cost.
5. Share realistic volume and delivery expectations
Provide prototype quantity, expected order quantity and annual demand where possible. Volume affects tooling strategy, cavity planning, production method and inspection approach. State the desired sample date and production date separately.
6. List documentation and approval needs
Tell the supplier which material declarations, inspection records, traceability documents or customer-specific formats are required. Requirements should be confirmed for the exact part and project rather than assumed from a general company capability statement.
A practical RFQ package
A concise package can contain the drawing or model, a one-page application note, material and hardness direction, forecast quantity, required documents, sample target and a short list of open questions. That gives both sides a clear baseline for DFM review and quotation.
Preparing a custom elastomer project?
Send the current drawing, application conditions and volume estimate. PRESIS can review the material, tooling and sample route with you.
Start an RFQ