Hello. If you have the formula to calculate the natural frequency of the extension coil springs (rotation free near the center of the hook), please let us know. If you have the calculation formula when the initial tension is applied, I would appreciate it if you could tell me too. Thank you for your help.
Thank you for writing to us, Mr. Sato!
We have a simple natural frequency calculation formula and extension spring data, so we apologize for the inconvenience, but please request from the link below so that we can send them to you.
https://www.tokaibane.com/en/consulting/
