With drawing, the quotation boundary is clearer
A with drawing RFQ should send a 2D drawing, 3D file, or clear PDF, and confirm drawing revision, overall length, thread length, end machining, nut style, tolerances, and material requirements. Clear drawings make the quote closer to production reality.
Without drawing, do not send only one model sentence
A without drawing RFQ can start with old part photos, measured dimensions, machine model, installation space, application information, and quantity. Photos should cover the full part, both ends, nut, flange, mounting holes, and marking text.
When engineering review is needed
Engineering review is needed when end dimensions are incomplete, the support unit model is unclear, the old part is badly worn, or load and speed have changed. The supplier may ask for more dimensions or quote by standard part, bar stock, cut length, or end machining route first.
RFQ checklist
- With drawing: 2D drawing, 3D file, drawing revision, key dimensions, and tolerances.
- Without drawing: old part photos, measured dimensions, machine model, and application information.
- End machining: support model, coupling end, lock thread, keyway, and retaining groove.
- State whether engineering review, sample checking, or copying the old part is needed.
Typical buyer situations
This topic usually appears in distributor stocking, repair replacement, machine retrofit, automation projects, and drawing-based purchasing. If a buyer sends only one model number, the supplier cannot judge the real use, packing risk, or whether machining upgrades are needed.
Details to confirm before quotation
To reduce repeated questions, the RFQ should cover product specification, use case, and delivery expectations together. The following points can be copied into the RFQ form or email.
- Purchase purpose: distributor stock, repair replacement, machine project, or sample testing.
- Specification: diameter, lead, overall length, thread length, nut type, and quantity.
- Machining: cut-to-length, end machining, and whether BK/BF, FK/FF, EK/EF, or other supports must be matched.
- Delivery: target quantity, expected lead time, packing, labels, shipping method, and whether shipment photos are required.
Common mistakes
A common mistake is asking only for unit price without application, quantity, or packing details. Another is sending photos without dimensions. This turns quotation into guesswork and can create errors in end machining, nut matching, or long-part shipping.
Next step
If the specification is clear, submit an RFQ directly. If the model or accuracy grade is still uncertain, describe the machine use and old part details so the supplier can recommend a standard part, bar stock, cut-to-length, or end machining route.
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