Contact
Frankfurter Straße 76
58553 Halver
Deutschland
Telephone: +49 (0) 2353 - 4098
Fax: +49 (0) 2353 - 4301
e-mail: federn@febrotec.de
Expert customer advice from 8.00 am – 4.30 pm Monday to Friday.

Abbrevation |
Designation |
| d | Wire / Bar diameter |
| Da | Outer diameter |
| Di | Inner diameter |
| D | Mean diameter |
| Lk | Length of spring body |
| αx | Angle of twist x |
| Md | Torque |
| Mx |
Moment at load at angle of twist x |
| Ls | Leg Length |