Old Window Spiral Balance

A home owner from 06067 says:
September 5, 2019
We have a summer cottage and one of the windows is very difficult to open and close - seems like there is too much tension on the spiral balance. I have no idea what kind these are and would appreciate ant help in identifying them so I can try and adjust the tension to see if that solves our problem.

A replacement is another option, but I would need to complete measurements, it looks to be 1/2 inch diameter and about 20.5 inch tube/spiral.

Any help would be greatly appreciated.

Thanks
John
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Tom from SWISCO responded:
September 11, 2019

It definitely sounds like you need a new balance. They're probably rusted from age, which would account for why they're hard to operate. The issue is, you have very, very old balances that aren't made anymore.

The good news is that I believe you can use our S500-21 as a replacement, along with a bracket like our 17-012. Look these parts over and let me know if you agree. You'll also find a charging tool like our 75-005 to be very helpful.
21" Series 500 Spiral Balance
21" Series 500 Spiral Balance
S500-21
$8.39
Bracket, #32
Bracket, #32
17-012
$1.20
Spiral Balance Charging Tool for Non-tilt Windows
Spiral Balance Charging Tool for Non-tilt Windows
75-005
$12.10
#8 x 1" SS Philips Pan Head Screw
#8 x 1" SS Philips Pan Head Screw
33-017
$0.21
#8 x 3/4" Philips Pan Head SS Screw
#8 x 3/4" Philips Pan Head SS Screw
33-090
$0.27
How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
VIDEO
WATCH >
How to choose the proper spiral balance tip color
How to choose the proper spiral balance tip color
GUIDE
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How to adjust a spiral balance on a non-tilt window
How to adjust a spiral balance on a non-tilt window
GUIDE
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