channel balance spring

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Quick Learner from San Jose, CA 95138

Aug 29, 2017 12:20 pm

I'm looking for the 26" channel balance with the code # 25 4 HS Cadwell.

BR,
Tien

User submitted photos of a window balance.

4 Replies

Tom from SWISCO

Sep 1, 2017 9:40 am

This looks like either an S380-26 or an S385-26 with a 2540 stamp option. You can verify the length by measuring the metal, as it appears you did, and you can verify the option by weighing the window. It should weigh between 19 and 25 pounds. As for the Series, measure the bottom shoe as shown below and choose the proper balance. Series 380 has a 1" shoe, and Series 385 has the 1-3/32" shoe in the picture.

Comparison of the S378, S380 and S385 balance shoes.

Home Owner from US

Oct 5, 2017 2:55 pm

Hi,'
Like a previous question you answered, I have a :
26" channel balance with the code # 25 4 GN Caldwell.
Which I guess is a 2540 stamp option.

When I take it out and weigh it, it's like 18.5 lbs.
Seems like right in the middle of a 2530-40
So, older windows that are heavy to open. Would a 2530 be easier to open or 2540?
Any advise would be appreciated.
Thanks

Tom from SWISCO

Oct 10, 2017 10:33 am

If your old stamp was 2540 and you found it worked fine, then you could stick with it. That said, I'd usually recommend 2530 for an 18.5 pound sash just because the minimum sash weight that the 2540 option can support exceeds the weight of your sash. A stronger spring isn't always better. But again, if you found 2540 worked fine in the past then you can stick with it if you prefer.