Path-force calculation Extension Springs Z-224X Metal spring main values:Material: EN 10270-1 d [mm]: 4.5 De [mm]: 30 L0 [mm]: 163 Fn [N]: 858.7 R [N/mm]: 9.079 F1 L1 s1 F2 L2 s2 Fn Ln sn L0 Dh m d De D Lk R F0 Lh Lh Note:Please increase: L1, L2L1; L2 should be between the values: 163 - 249.66 Prestressed metal spring: L1 (mm): Prestressed spring length RegularExpressionValidator s1 (mm):-prestressed spring deflection F1 (N):-prestressed spring force L1 have to be a positive number. Please enter a value for L1! L1 should be between the values: 163 - 249.66 Tensioned metal spring: L2 (mm): loaded spring length RegularExpressionValidator s2 (mm):-loaded spring deflection F2 (N):-loaded spring force L2 have to be a positive number. Please enter a value for L2! L2 should be between the values: 163 - 249.66 L1 must be less than L2! Contact details Monday - Thursday: 8–12 hrs and 12.30-16.30 hrs Friday: 8-12 hrs and 12.30-15.30 hrs Telephone: (+49) 07123 960-0 or (+49) 07123 960-192 Telefax: (+49) 07123 960-195 eMail: service@gutekunst-co.com