Replacement Sash Support Coil Balance

A quick learner from swedesboro, nj says:
March 9, 2016
The coil has broken on my vinyl window. There are not any markings to indicate the manufacturer or weight. The sash is 28 X 30. Double pane.
User submitted a photo of a pivot shoe.
A quick learner from swedesboro, nj says:
March 9, 2016
Additional picture added.
User submitted photos of a pivot shoe.
Profile picture of Paul
Paul from SWISCO responded:
March 10, 2016
This looks somewhat like our 15-177 pivot shoe, which also works with the Series 152 coil spring. See what you think.
A quick learner from swedesboro, nj says:
March 10, 2016
Concerned about the end of coil. Mine is bent and fits in that groove. There is no hole on either end of the coil. Also I have no idea what weight the coil needs to be. I notice a "F" on the coil.
A quick learner from swedesboro, nj says:
March 10, 2016
It does look like the 15-177. How does the coil secure in the shoe? If you can recommend what weight the coil should be I would be glad to make the investment in 2 complete new pivot shoes with coils.
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Paul from SWISCO responded:
March 11, 2016
Our Series 152 screws to the shoe. You have an older version that is no longer available. I can't tell if your shoe has accessible screw holes or not, so you should check to make sure. The 15-177 has a screw hole on either side.

As for the stamp, can you tell me how much your sash weighs? Can you also confirm how many springs are used on each side of the window?
A quick learner from swedesboro, nj says:
March 14, 2016
i have weighed my sash. It weighs 18 lbs. I have one on each side. Would that then be two 9 lbs? I guess i will need two 15-177's also.
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Paul from SWISCO responded:
March 15, 2016
Yep, with one spring on each side of an 18 pound sash, I would go with the S152-9.
Coil Balance Shoe, Slate Blue
Coil Balance Shoe, Slate Blue
15-177
$3.47
9 lb Series 152 Coil Balance
9 lb Series 152 Coil Balance
S152-9
$5.15
#6 x 3/8 SS Pan Head Screw
#6 x 3/8 SS Pan Head Screw
33-071
$0.21
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