1950s era spiral channel balance - no names or markings noted on the existing hardware.

A home owner from Hackensack, MN says:

Hello,

I am looking to replace some spiral balances. This is the first window i am attempting; i will have two others (of a different size). The old window bottom sash is about 24" high (longest side). The old spiral balance mounting brackets were in the 5/16" wide channel in the sash, and there was 22" between brackets. The only 'external to the channel' part of the mounting was a bracket that extended about 1" above the channel/lower sash, where a screw secured it to the jamb just above the lower sash when the window was closed. This bracket can be seen in the second photo; i bent everything quite a bit when trying to remove it (not knowing exactly how to do that. The sash weighs about 9 lbs (without the old balances). Can you please advise replacement spiral balances and the hardware i will need to complete a replacement project?

Thanks very much! Al 

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Emily from SWISCO responded:

Hi, Al!

We don't carry your exact hardware but you can use our Series 500 and 17-012 bracket, which is sold separately. We've been using this combination as a solution for wood windows like yours for years and years and we find that it works great. See what you think!

A home owner from Hackensack, MN says:
Thanks, Emily!
That looks promising. So, if i plan on purchasing two of the Series 500 balances and two of the 17-012 brackets, as this is my first balance replacement project, what else do i need? It seems like there should be two more brackets (or something) needed, and i would get the mounting screws from you as well. Can you advise on a 'complete package' of all parts? That would be fabulous...

Thanks!!
Al.
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Emily from SWISCO responded:

I recommend our 75-005 charging tool, 33-017 to mount the balance and 33-090  for the bracket. We also have a blog article here  that will walk you through the replacement process for this type of balance. 

How to adjust a spiral balance on a non-tilt window
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