Spiral Balance springs and bracket replacments

Question

Hi

I had both balance springs fail on a window that had not been opened for a long time. Both came loose at the sash connection.

The balance springs I have have are 30 inches long and 3/8 inch in diameter

and have orange tips. The springs have a flat blade on the tip with two perforations. one of the failed springs had a cross piece of metal in the blade perforations.

I do not have brackets that mount to the bottom of the window like are shown in your help video, so I am not sure how the sash attachment bracket works and if it is changeable. I want to buy replacement brackets along with two balance springs and the charging tool.

Thanks

Jim

Bob · Accepted Answer

Hey Jim. This might be an S400-30 Spiral Balance. As you can see from the Related Item(s) section on its shop page, this balance can work with a wide variety of different bottom brackets. I think it would be best to check an identical window in the house to determine which, if any, of these brackets are what you need. Let me know if your balances in fact use a different configuration, and send pictures. You can read more about removing and replacing non-tilt spiral balances here.