Double Coil Balance

Thank you for your picture submission.

It looks to me like your pivot shoe is similar to our 15-177. 

Can you possibly send us a picture of the coil removed from the shoe? There are a few different coil series that this pivot shoe is compatible with.

Thank you for the additional pictures.

Do you have any of just the coil springs? This will help us determine the proper series you need.

Once again, thank you for the additional pictures.

It looks to me like you have our Series 152 coil balances and based on the information you provided, you will need both 5 and 6 lb coils.

If there is anything further I can do for you, please let me know.

The only way to know that for sure will be to remove your window and physically weigh it.

Each coil can only hold so much weight so in order to know what that number is, you need the weight of your window divided by 2, and in your case divided by 2 again since there is more than one coil on each side.

If you can get this done, we will be able to lock down the coil options for you.

If your window weighs exactly 20 pounds, you will need to order two 5lb coils for each side of the window in order to properly stabilize the window. 

I believe that your current balances were holding too much tension and that is why they broke the way they did.