Quick answer: Dimensions establish part conformity, while assembly checks verify the intended function and mating interfaces.
Why is dimensional first-article inspection not always enough?
A strip spring can satisfy drawing dimensions yet rub, track poorly or miss the required force window in a mechanism. Define first-article evidence that covers both. Avoid reporting a full approval when only a subset of dimensions was checked.
A practical verification method
Match the measured part to the drawing revision and record functional results in the representative assembly.
| Item | What to record | Purpose |
|---|---|---|
| Reference configuration | Part or assembly identity and drawing revision | Make comparisons traceable |
| Test conditions | Relevant position, direction and operating condition | Compare the same characteristic |
| Decision evidence | Match the measured part to the drawing revision and record functional results in the representative assembly. | Resolve the specific question before approval |
Use the result in an engineering request
Describe the observed condition and the required function separately. Include the relevant drawing revision and your results from the check above. If an acceptance limit has not been established, identify it as an open design input rather than treating a successful trial as approval.
Review the related Leading Spring product information. For a project-specific review, send the mechanism description, available geometry and the evidence relevant to this decision through the contact page.
Editorial note: AI-assisted engineering guidance, prepared from the topic-specific reasoning shown here and the company’s public product context. Illustrations explain decisions; they are not customer-case photographs or test results. Product-specific suitability requires review against your approved requirements.