Broken coil balances

A quick learner from Port Jefferson Sta. NY says:
August 5, 2014
I have a single hung tilt sash window with double coil balances on either side. The coils are 1/2 inches wide. The outboard coils are marked 540 and are okay. The inboard coils are marked 640 and are both broken. The sash measures 41 x 23 and the window brand is unknown. The pivot shoe closely resembles your 15-046 as far as dimensions go. The bushings and coil cover show some wear, but appear to be in good condition. The coil cover screw centers are 1-1/4 inches. I would like to replace all four of the coil balances, if you can help me.
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Tom from SWISCO responded:
August 5, 2014
The 15-046 isn't used with coil balances, typically. Can you take a few pictures of your pivot shoe so we can find a good match? Once we've identified your pivot shoe, we can use that as a jumping-off point to find the appropriate coil balance Series. Thanks!
A quick learner from Port Jefferson Sta. NY says:
August 7, 2014
here are some photos
User submitted photos of a pivot shoe.
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Tom from SWISCO responded:
August 7, 2014
Great, thank you. This looks like our 15-180, but make sure the dimensions match. If so, I also recommend our Series 190 coil spring.
Pivot Shoe, 1/2" Thick
Pivot Shoe, 1/2" Thick
15-046
$2.15
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
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Swisco's 15-046 Pivot Lock Shoe
Swisco's 15-046 Pivot Lock Shoe
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How to remove window pivot shoes
How to remove window pivot shoes
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Anatomy of a tilt window
Anatomy of a tilt window
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