industrial-springs.com 
Constant force spring in metal box
Enclosed constant force springs can be incorporated directly into the structure. This type of constant force spring is made from strips of stainless steel (type 301), and the spring will maintain a constant force over its whole extension. The required spring tension can be increased or reduced by rotating the adjustment unit clockwise or anti-clockwise
Material
Stainless steel tape extension in galvanised house.
Description
SODEMANN INDUSTRIFJEDRE A/S can offer a compact, adjustable, inexpensive, yet extremely useful constant force spring. The constant force spring is housed in a galvanised case with stainless steel tape extension.
Comes with attachment fittings. The dimensions of the case is 84mm * 84mm * 25mm All springs have a maximum extension of 990mm
The hole in the middle measures 6.9mm x 6.9mm x 20mm.
Travel
All standard types have a maximum extension of 990 mm - but only have a constant force over the first 609 mm.
Winding direction
Stock no. "KF100" = right-handed version
Stock no. "KF101" = left-handed version
Fitting and use
- Adjustment must only be performed when the belt is completely inside the housing.
- The unit is lubricated and requires no further maintenance
- Extension must always be straight - never in a way that allows the strip to scrape against the casing, for example
- The strip must not be allowed to return uncontrolled into the casing
- The strip must not be painted
- All adjustments must be made with a 1/4 rotation
The required spring tension can be increased or reduced by rotating the adjustment unit clockwise or anti-clockwise.