The minimum usable RFQ package
A useful investment casting RFQ gives the supplier enough information to understand the part, identify the important requirements and explain what still needs clarification. Begin with the current drawing revision, material requirement, requested quantity and the features that matter to assembly or service. Add the intended destination and desired timing so that the technical discussion and quotation have the same starting point.
A catalogue item can help communicate a shape or process reference, but it is not a substitute for a project specification. If you use a catalogue URL, say whether you want that listed item, a different configuration or a new component that only resembles the example. List the differences explicitly. A change in material, thread, mounting pattern, finish or inspection requirement can change what needs to be reviewed.
This checklist is a preparation guide for business buyers. It does not establish a standard minimum order, production lead time, tooling arrangement or inspection package. Those points need to be confirmed for the actual enquiry. The shorter Relia RFQ guide provides a convenient starting checklist; the sections below explain how to make each part of that checklist useful.
Identify the part and its controlled documents
Give the component a clear name and part number. Put the drawing revision in the message as well as in the document filename. If you provide a two-dimensional drawing and a three-dimensional model, identify the revision of each and explain which document governs dimensions, tolerances and notes if they disagree. This helps prevent an apparently simple quotation from being based on two different versions of the part.
State the units explicitly. A drawing should not depend on someone inferring millimetres or inches from the apparent scale of a photograph. Where a model and drawing use different unit conventions, resolve that before asking for a final quotation. Include the overall dimensions needed to understand the component envelope, and identify any internal features that are difficult to see in a rendered view.
Separate requirements from background material. An old photograph, previous sample or assembly illustration may explain the application, but it should not silently override the current drawing. Mark superseded documents clearly. If a reference is provided for information only, say so. A brief document list with the filename, revision and purpose is often easier to follow than several attachments with similar names.
When the enquiry starts from a sample
Explain what the sample represents and what remains unknown. A sample may show an external shape or an assembly relationship without establishing the original material grade, hidden dimensions, coating specification or acceptable variation. Identify any damage, wear or modifications that should not be reproduced. Ask what further information is needed to establish a controlled specification before production is discussed.
Specify the material without leaving substitution implicit
Write the full alloy designation and the applicable standard when one is required. “Stainless steel” or “aluminum” describes a broad family rather than a complete order requirement. Preserve suffixes and other details in a grade designation. If the drawing and catalogue use different references, ask for a written review rather than assuming that familiar-looking names mean the same material.
Include any required supplied condition, material records or identification requirements. If your purchasing specification calls for evidence linked to a production batch, describe the link you need between the document and delivered parts. Ask which evidence is available for the proposed order and whether it is included in the quotation. Do not infer a documentation package from an unrelated product listing.
Describe the service environment only to the extent relevant to the part. Fluid exposure, operating temperature, cleaning conditions or contact with other materials may be important inputs to a material discussion. These details help frame a review; they do not replace the buyer's engineering approval. The materials and grades page explains how catalogue material families and item-specific grade references should be read.
Distinguish critical features from general dimensions
Mark the features that control fit, sealing, motion or assembly. Examples of information to identify include datums, mating faces, bores, thread specifications and mounting relationships. Explain the function of an interface when that helps clarify the requirement. A drawing with every dimension labelled equally important gives less useful guidance than one that makes the genuinely critical relationships clear.
Separate general tolerances from local requirements. If a particular bore or mating face needs a different tolerance from the rest of the casting, show it at that feature. Identify which faces may remain as cast and which need secondary machining. Avoid using phrases such as “high precision” as the sole acceptance requirement; state the drawing requirement that the finished part must satisfy.
Specify surface requirements by area. A roughness note should identify the relevant machined surfaces, units and acceptance basis. A coating request should identify the finish specification and any masked threads, protected bores or contact surfaces. If dimensions are to be checked before or after finishing, make that relationship clear. These details belong in the technical scope rather than being left for a last-minute packaging note.
Explain the assembly boundary
State whether the request is for a single casting, a machined component, an assembly or a complete product. A housing in the catalogue is not necessarily a complete machine. Identify purchased inserts, fasteners or other items that the quotation should include, and distinguish them from parts supplied by the buyer. If assembly fit must be demonstrated with a mating part, explain how that part will be identified and made available.
Give quantities and project stages separate meanings
State the quantity you want quoted for the initial order. If you would like price comparisons at several quantities, label each quantity clearly. Add expected annual demand separately, with an indication of whether it is a forecast or a committed order. A large annual estimate should not be confused with the quantity released in a single production batch.
Describe sample needs as their own project stage. Identify the desired sample quantity, drawing revision, required records and approval purpose. Ask how tooling, sample preparation and production parts would be presented in the quotation. Do not assume that sample costs, credits, ownership or retention arrangements follow a universal rule. Request those terms where they affect your purchasing decision.
Provide the target delivery date as a planning input and ask for the proposed schedule. Distinguish any internal approval deadline from the date when parts are needed at destination. If a sample approval is required before production release, include that dependency. The supplier's response should explain the schedule being proposed; the requested date alone is not an agreed delivery commitment.
Define acceptance before comparing quotations
List the inspection records and acceptance criteria required for the order. Identify critical dimensions, appearance requirements, material evidence and any special test requests. For a special test, state the method or standard requested, the part area concerned, the acceptance criterion and the sampling expectation. Ask for availability and scope to be confirmed rather than assuming that a method named in an enquiry is automatically included.
For first-article approval, name the decision owner and describe the evidence needed to make the decision. Keep the approval tied to the correct drawing revision and sample identification. If a deviation is proposed, record the exact feature and the proposed acceptance rather than treating a general email acknowledgement as approval of every requirement.
Separate cosmetic and functional concerns. A visible face may need an agreed appearance reference, while a hidden interface may be governed primarily by dimensions or surface condition. Define viewing conditions or reference samples where appearance matters. See the quality requirements guide for an inspection matrix that can be adapted to your project.
Make commercial and delivery scope visible
Ask the quotation to distinguish tooling, samples, production parts, secondary operations, inspection records and packaging where applicable. Identify the destination country and delivery location needed for a freight discussion. State any marking, packing or corrosion-protection requirement, but ask which options can be supplied and at what scope. A product reference does not establish that freight, import clearance or destination taxes are included.
Before accepting an offer, compare the assumptions and exclusions as carefully as the unit price. Check quote validity, payment terms, order quantity, drawing revision, material, finish, acceptance records and delivery terms. If one quotation includes machining or inspection that another excludes, the prices are describing different scopes. Resolve those differences before treating the offers as directly comparable.
A concise first-message structure
- Part number or catalogue URL, with current drawing revision and units.
- Material grade, standard and any required supplied condition.
- Initial quantity, sample needs and expected annual demand.
- Critical interfaces, machining, finish and acceptance requirements.
- Destination, target timing and the commercial items you need quoted separately.
Use Contact & RFQ or email [email protected] to begin. The website form supports a message; it does not provide a verified document-upload facility. Identify the documents you wish to share and confirm a suitable transfer method with the contact team. For catalogue examples, browse investment and lost-wax casting references and include the relevant URL in your enquiry.
Keep one decision record
After clarification, keep the agreed document list, quotation assumptions and open questions together. Identify who must approve a material change, sample or revised drawing. This gives purchasing and engineering the same requirement set when the enquiry becomes an order.
