Paul from SWISCO responded:
February 2, 2017
The balance manufacturer only sells these channel balances complete. You will not be able to simply buy the spring by itself, unfortunately. We wouldn't advise it even if it were possible. These things are under a lot of pressure and installing them requires special tools and training. It would be far easier and more cost effective to simply replace the balance entirely. Consider our Series 795 channel balance for tilt windows.
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