Spiral balances for tilt windows

Question

I need to replace 46 (23 windows) spiral balances.
As pictures the old spiral balances have blue tips and white plastic tube covers. Most of the plastic tubes are cracked and falling off.

The tube size is 28 1/2 long and 3/8 inches in diameter.

These are original windows and I can find no brand names or numbers on the windows or on the balances.

The windows have fixed upper window and tilt out lower. I have not been able to remove the lower windows as shown in your Youtube demos.
Hope you can help. I can't afford to replace my windows.

User submitted photos of a window balance.

Paul · Accepted Answer

Thanks for contacting us. Can you confirm the diameter of your outer tube? Looking at your balance, I think it should be more like 5/8" or 9/16". If so, I would recommend our Series 600 spiral balance. Can you also confirm the length of the outer tube? I know it's broken in your pictures, but if you have an undamaged version elsewhere in the house you could use that. Alternatively, you can measure from the end of the balance (where the screw hole is) to just up to the bottom of the blue bearing. That will give you the length as it is determined in the industry.