Common Spring Sourcing Mistakes and How to Avoid Them
Most spring sourcing problems trace back to a handful of avoidable mistakes. They cost time and money in rework, rejects, and delays, and they almost always start at the specification stage.
Here are the errors that show up most often, and how to sidestep them.
1. Specifying size without load
A spring that measures right but carries the wrong load is still a failed part. Always pair dimensions with the working load at a given height, or the torque at a given angle.
2. Choosing material on cost alone
Spring steel is cheaper, but stainless steel is the right call for moisture or washdown. Picking the wrong material leads to field failures and returns that cost far more than the material savings.
3. Over-tightening tolerances
Tolerances tighter than the function requires raise cost and lead time. Specify tight ranges only on the dimensions that actually matter.
4. Ignoring end type and mounting
Closed, ground, or open ends change how a compression spring seats. Hooks and legs change how extension and torsion springs mount. Confirm these details in the drawing.
5. Skipping the prototype
Ordering a full production run without a sample is the fastest way to a costly mistake. A prototype validates fit and function for a fraction of the final order cost.
| Mistake | Result | Fix |
|---|---|---|
| No load spec | Wrong spring rate | Add load at height |
| Wrong material | Corrosion failure | Match material to environment |
| Tight tolerances | Higher cost | Specify only critical ranges |
| Skipped sample | Rework or rejects | Prototype first |
How to avoid all of them at once
- Write the load or torque requirement.
- Match material to the environment.
- Set tolerances only where needed.
- Confirm end type and mounting.
- Order a prototype before production.
These five steps remove the most common sources of spring sourcing failure.
FAQ
What is the most expensive spring sourcing mistake?
Skipping the prototype. A full production run of a wrong part costs far more than a small sample order.
How do I know if my tolerances are too tight?
Ask the supplier what range is standard for your part size. Tighten only the dimensions that affect function.
Should I always order a sample first?
For custom parts, yes. A prototype validates fit and function before you commit to production.
What if I am not sure which material to use?
Describe the environment and load. The supplier can recommend spring steel or stainless steel and quote both.
Can you help me avoid these mistakes?
Yes. Send your requirements and the supplier can review the specification and flag issues before quoting.
What is the quickest way to get a reliable quote?
Provide the load, material, end type, and quantity, plus a drawing or sample. A complete spec quotes faster and more accurately.
Small fixes prevent big losses
These mistakes are easy to make and easy to avoid. A complete specification and a prototype order remove most of the risk from custom spring sourcing.
Send your requirements and the supplier can review the specification and help you avoid common sourcing mistakes.
Browse the Precision Springs catalog for related parts, or submit your specifications to request a quote.