Torsion springs

Torsion springs are produced on modern CNC machines with 100% control of leg position, automatic adjustment of spring characteristics and elimination of unsuitable springs.

Production batches range from one piece to large-scale production.

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

Spring shapes: cylindrical, conical, barrel and double torsion springs or special shapes

Leg shapes: straight legs (shape 1), bent outwards (shape 2), bent alongside the body of the spring (shape 3), bent towards the centre (shape 4), special shapes in line with customer requirements.

Materials: patented spring wires (EN 10270-1), oil-hardened spring wires (EN 10270-2), non-corrodible spring wires (EN10270-3), zinc-coated spring wires, conducting wires (CuSn) etc.

The list of materials can be seen here.

Additional treatment: micro-forging

Surface treatment: phosphatizing, bluing, zinc-coating, nickel-coating, passivation, powder-coating, application of special anti-corrosion or anti-slip coating etc.

d	[mm]	wire diameter	a0	(°)	angle between the legs of an unloaded spring
De	[mm]	external diameter of the spring	a1	(°)	angle between the legs of a pre-stressed spring
D	[mm]	middle diameter of the spring	a2	(°)	angle between the legs of an unloaded spring
Di	[mm]	internal diameter of the spring	an	(°)	maximum permissible angle between the spring legs
Lk	[mm]	length of the body of an unloaded spring
Is1	[mm]	length of 1 spring leg	M1	(Nmm)	spring moment at angle a1 (pre-stressed spring)
Is2	[mm]	length of 2 spring leg	M2	(Nmm)	spring moment at angle a2 (loaded spring)
			and	(Nmm)	maximum permissible spring moment
n		number of coils
R	(Nmm/°)	spring characteristic	Dd	[mm]	diameter of the leading mandrel
m	[mm]	spacing between the coils (step)	Dh	[mm]	diameter of the leading casing