Quick answer: Check wear, debris, contact pressure and dimensional change under the actual motion and environment, rather than assuming a soft guide is harmless.

What should be checked when a metal strip runs through a polymer guide?
A polymer can reduce audible rubbing yet develop grooves or particles. The guide's shape may concentrate contact on an edge. Temperature and cleaning exposure may also change its fit. Select the guide and spring path as a contact pair with defined inspection criteria.

A practical verification method
Inspect guide grooves and strip marks after representative cycling; record particle generation and changes in pull force.
| 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 | Inspect guide grooves and strip marks after representative cycling; record particle generation and changes in pull force. | 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.