Extension Springs FAQs

1. And for the dynamic applications?
For dynamic applications (2,000+ cycles) the customer should apply a maximum load of approximately 75% of the catalog load P. We recommend pre-loading the spring to prevent surging.

2. Can it be deflected past L1?
No. L1 is the recommended maximum deflection for static applications.

3. Helix?
Extension springs are left- or right-hand wound.

4. Is the spring magnetic?
Type 302 stainless steel is slightly magnetic.

5. Number of coils
It is always a reference dimension.

6. What about the end positions?
Springs are manufactured with end positions in-line ±22°

7. What are the hooks?
All extension springs have full hooks which have not been cut for installation purposes. Closed loops are provided to help alleviate tangling. The I.D. of the hook is approximately equal to the I.D. of the spring body.

8. What is the finish?
The finish is that of the plain wire. Music wire is oiled to prevent corrosion.