Extension springs

Extension springs

Our full assortment of extension springs comprises of four different ranges with wire thicknesses between 0,2mm and 10mm. All extension springs are produced in regular spring steel EN 10270-1-SM, and are often also available in stainless steel EN 10270-3-1.4310.

The SF-DFX, SF-DFS range was designed specifically for heavy loads. Coil lengths at 300mm and 1000mm can be cut and used at a desired length.


To determine the spring force at a certain length, multiply the travel in mm ( with the rate (C), and add the intitial force (F0)

PDF icon Extension springs diameter 0,2mm to 10mm (SF-DF, SF-DFR)350.66 KB
PDF icon Extension springs diameter 0,5mm to 5mm (DF-A, DF-AR)348.07 KB
PDF icon Extension springs heavy load (SF-DFX, SF-DFS)313.98 KB
PDF icon Coil lengths, thread fittings and spring sockets373.15 KB