Quick answer: Measure at the actual output shaft over the defined working rotation. Do not infer assembly torque solely from strip dimensions.
Where should nearly constant torque be measured?
Bearing drag, drum contact and transmission losses affect output. The torque observed at a handle may differ again if gears intervene. State the measurement datum, direction and speed so part-level and mechanism-level results are not mixed.
A practical verification method
Compare spring-only and assembled shaft traces; report start, middle and end values in each direction.
| 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 | Compare spring-only and assembled shaft traces; report start, middle and end values in each direction. | 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.