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Constant force spring - Technical information

Spring life
The life of the spring is determined by the relation between the diameter of the spring and the thickness of the material. See information for the relevant item. For applications demanding a higher number of oscillations, the spring must be changed once the recommended number of oscillations has been reached. Spring life is not time dependent, it is only determined by the number of oscillations made.

Fitting
Fitting can be done in a number of ways. During long extensions, the spring must be laterally guided to prevent movement in a sideways direction. Suitable play on each side is 0.5–1.5 mm. When fitting on a bearing or conduit, the spring can be located using its own force providing that sufficient strip length remains on the bearing. If there is no operating extension limit in the application, we recommend that a screw or rivet is used to secure the inner end of the spring.

Fitting on a bearing and conduit
Our standard springs and slide bearings are normally supplied separately. Fitting is done by loosening the outer end of the spring and winding it onto the bearing (securing it if necessary), after which the complete spring is wound onto the bearing.