Quick answer: Use the maximum assembled coil envelope across the entire intended stroke, including manufacturing variation and guidance requirements.
Which coil envelope belongs on the housing drawing?
The amount of strip stored on the coil changes during travel. A housing clearance checked in only one condition may interfere elsewhere. Clearance must also consider axial float and end geometry. Increasing enclosure size is only useful if the mounting datum keeps the strip centered.
A practical verification method
Inspect the complete motion with worst-case dimensional samples and document the position where clearance is smallest.
| 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 the complete motion with worst-case dimensional samples and document the position where clearance is smallest. | 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.