extended spiral balance - old non-tilt aluminum windows

Question

I think I have extended spiral balances.
One window has metal rods which are approx. 28.5" and the spiral rod is 30.75".
The other window has a metal rod approx. 16.5" and its rod is 18.75". They are 3/8" in diameter and the holes in the spiral rod at the bottom are 1/2" apart. Do you sell these?

Also, I understand the metal clips are obsolete. Are they necessary for the operation of the window? Is there an alternative?

Paul · Accepted Answer

Many thanks for writing in. You are correct about the metal fork; it hasn't been available since the 1970's. The function of the forks are to hold the nylon shoe in place so to make it easier to install the sash. It doesn't have any function on the sash performance. As for the 3/8" balance tubes with extra long spirals, they are our Series 300 balances.

Now, we need to find out what nylon shoe is that you need to attach to the spiral. Since they are missing on your old balances, please show us the top and nylon fittings on the side of the sashes. They might help us to determine what nylon shoe you need on the spirals. Many thanks.