A customer of mine has a broken string on their window balance from a Syron window (out of business). Rather than trying to re-string it, as I'm not sure how long it should be, how much tension, etc, I'm looking for a replacement.
They are tilting sashes, with the "plain" style balance channel. Stamped on the metal balance is "PC BSI" and "24B". The dimensions of the balance are 24" long, 9/16" wide, and 1/2" deep. The balance attaches to the window via one screw at the top (photo Balance1). The spring inside is attached at the top to a pin/rivet in the 2nd hole down on the balance (photo Balance2). The bottom of the spring is attached to a gray plastic piece with 2 pulley wheels on the back side (also photo Balance 2). The string is tied to there and goes down to the black plastic pulley at the bottom (photo Balance3), back up and down a few times, then exits the bottom where it attaches to a metal clip (photos Shoe1 and Shoe2), which inserts into the pivot shoe.
The pivot shoe itself appears to be your Part #
15-135. One of these are broken as well, so I'll be ordering a few of those. I'm just concerned with selecting the right balance, with the right clip to attach to the shoe. The sash weight (according to her old bathroom scale) is ~23lbs; it's a rather wide double hung.
Thoughts, please? :)
Thank you!
Bryan