Torsion springs are just like compression and extension springs very common and also a very well-known type of spring. However, they are available in a much larger variety that other types of springs. This is due to the way of enclosing/clamping.
Torsion springs can also be made from both, round and squared wire. A torsion spring from flat wire or flat sheet steel is called a clock spring.
CNC directed spring coilers- and wire bending machines are used in order to manufacture torsion springs. The reproducibility of previous made torsion springs and torsion brackets can therefore be guaranteed.
Applications
Torsion springs are used to bring the rotating movements back to its original position or to exert a clamping force by means of a rotating movement. Some specific examples are;
• Mailbox flap
• Door handles
• Clamping recessed spotlights
• Punches
• Clap skates
• Tools (pliers that open up automatically)
• Garage doors
• Rotating arms in car washes
Materials
The major part of the torsion springs is manufactured from Stainless Steel-spring steel (1.4310) or high carbon spring steel (1.1200). The last mentioned can be done from pre-galvanized material, however this is not preferred. The chance on (really) small bursts in the zinc layer is possible when the wire is winded into a spring body. This may cause the basic material to get in touch with open air. If the risk on corrosion should be small to negligible, it is advised to galvanize at the end, or even better, by choosing a Stainless Steel type of steel. For other opportunities concerning materials, we refer you to the special page; Material choice.
Characteristics
Our possibilities regarding the torsion springs are very extensive. We can process wire thicknesses from 0,20 mm. Torsion springs are manufactured (semi-) automatically on CNC machines when the thickness concerns up and until approximately 10 mm. Torsion springs of larger wire thicknesses do not appear often and are therefore made by our manual labour department.
TORSION SPRINGS ARE COMPLEX
Torsion springs are often complex products. The geometry of the torsion spring is often not easy to mention. Due to the way of installing/clamping a torsion spring, special ends are required. Due to this, a torsion spring can often be named partly a wire form or wire spring.
CAPTURING A TORSION SPRING
A torsion spring is not easy to capture in a drawing because of its complex geometry. It is even sometimes impossible to capture the spring in a drawing. In order to make quality demands measurable, and to guarantee reproducibility of the product, we search in such cases, together with the customer, for alternative opportunities in order to still register the product completely.
