How to Prepare a Spring Drawing and RFQ That Gets Quoted Fast
A complete RFQ gets a quote on the first pass. A vague one triggers a round of questions and delays. The difference is whether your drawing contains the fields a spring manufacturer actually needs.
Here is what to include so the supplier can price and schedule your part immediately.
The core dimensional fields
- Wire diameter.
- Outside diameter (and inside diameter if relevant).
- Free length and coil count.
- End type for compression springs.
- Hook or leg style for extension and torsion springs.
These dimensions define the part shape. Without them, a supplier has to assume or ask.
The functional fields
- Working load and compressed height, or spring rate.
- Torque and deflection angle for torsion springs.
- Initial tension for extension springs.
- Expected cycle count or life requirement.
Functional values tie the spring to how it performs. They are more useful than dimensions alone.
Material, finish, and quantity
| Field | Example |
|---|---|
| Material | Music wire, stainless steel 304 |
| Finish | Zinc plated, nickel plated, plain |
| Quantity | 5,000 pcs annually |
| Target delivery | 8 weeks |
Material, finish, and annual quantity drive cost and lead time, so include them even on a first inquiry.
If you do not have a drawing
Send a sample with a note on any changes needed. A photo with a ruler and the working load is enough for simple parts. The supplier can produce a drawing for your approval.
Do not let a missing drawing block the inquiry. A clear description plus a sample is a strong starting point.
FAQ
Can I get a quote without a drawing?
Yes. A sample, a sketch with dimensions, or a clear description is enough to start. The supplier can finalize the specification.
What is the single most important thing to include?
The working load at a given height (or torque at an angle for torsion springs). It ties the part to its actual function.
Should I include tolerances in the first RFQ?
Only where they are functionally required. Reasonable tolerances keep the part affordable. The supplier can advise on standard ranges.
How do I specify quantity?
Give the annual or per-order quantity. It affects unit cost and tooling decisions.
Can you produce the drawing for me?
Yes. Send a sample or sketch and the supplier can create a drawing for your approval before production.
What format should my drawing be in?
PDF, CAD export, or a clear image all work. Include dimensions and a scale reference where possible.
Complete RFQs quote faster
The more complete your drawing, the faster the quote. Include dimensions, functional values, material, finish, and quantity, and the supplier can return a price and lead time on the first pass.
Send your drawing or sample with material, quantity, and delivery target to get a detailed quote.
Browse the Precision Springs catalog for related parts, or submit your specifications to request a quote.