Tension springs are mostly produced in batches ranging from one piece to small-scale production. Springs with extended loops can also be produced on a large scale.
We mostly produce springs based on customer drawings, but we can also advise you with development of new springs and help you come up with the best solution.
At the customer’s request we can equip each shipment with a measurement sheet containing the required data (F1, F2, cp, cpk…)
Wire diameter: from 0.35 to 3.5 mm
Loop shapes: German, English or in line with customer requirements
Materials: patented spring wires (EN 10270-1), oil-hardened spring wires (EN 10270-2), stainless spring wires (EN10270-3), zinc-coated spring wires, conducting wires (CuSn) etc.
Additional treatment:shot peening, deburring etc.
Surface treatment: phosphatizing, bluing, zinc-coating, nickel-coating, passivation, powder-coating, KTL painting, application of special anti-corrosion or anti-slip coating etc.
|De||[mm]||external diameter of the spring|
|D||[mm]||middle diameter of the spring|
|Di||[mm]||internal diameter of the spring|
|L0||[mm]||free length of the spring|
|L1||[mm]||length of a pre-stressed spring|
|L2||[mm]||length of a loaded spring|
|Ln||[mm]||maximum permissible length of the spring|
|Lk||[mm]||length of spring body|
|Lh||[mm]||length of spring loop|
|F1||(N)||spring force at length L1 (pre-stressed spring)|
|F2||(N)||spring force at length L2 (loaded spring)|
|Fn||(N)||maximum permissible load of the spring|
|s1||[mm]||spring sag in the pre-stressed state|
|s2||[mm]||spring sag in the stressed state|
|sh||[mm]||used spring sag|
|sn||[mm]||maximum permissible spring sag|
|n||number of active (working) coils|
Tension Spring Loop Shapes
German Loop Lh = 0,8 to 1,1Di
German Sideloop Lh = Di
Double German Loop Lh = 0,8 to 1,1Di
Double German Sideloop Lh = Di
1/2 German loop Lh = 0,55 to 0,8Di
English Loop Lh = 1,1Di
Tension Spring Loop Positions