Coil Balance Spring #5

A quick learner from Simpsonville, SC says:

March 10, 2019

I'm looking to replace some coil balance springs for a sash that is about 19 lbs. The spring was marked with a 5 on it. It is just a single spring on each side.

I tried using the S190-540 coil balance springs, but they didn't hold the weight. I also tried the S190-640 coil balance springs, which held it up, but it was difficult to put the window up and down. I actually ordered these for a double coil setup but had to replace a single coil setup first and thought these might have worked. They did work great for the double coil setup though, so thanks for the recommendation.

Bob from SWISCO responded:

March 11, 2019

Thanks for posting. Does this window use the 15-180 Pivot Shoe? If so, then yes, you'll need Series 190 Coil Springs. I can't explain the stamps on your old single coil setup, but for a window sash with a weight of 19 lbs, I advise you switch to a double coil setup. You will need (4) of the S190-540, with 2 installed on either side of the window sash.

Coil Balance Shoe

15-180

$3.97

540 S190 Coil Balance Spring

S190-540

$9.74

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