looking for the right part

Quick Learner from Anchorage AK

Aug 1, 2024 1:52 pm

I need to replace the balances for a sash window - see photos. I think I need: 21" Series 385 Channel Balance, Product Code: S385-21, but I'm not sure about what weight I should get. When I place a scale between the sash and bottom without the balances in place I get reading between 15lb and 25lb, depending on whether I push down and let go or just lower gently. Does this mean I distribute the weight over both balances (I.e. get the 8 - 12 lb ones) or do I get the next size up? Thanks, Chris

2 user uploaded images

6 Replies

Casey from SWISCO

Aug 2, 2024 12:00 pm

Hello,

We'd be happy to look into this for you but we'll need a bit more information to narrow down your options. If you could show us the connecting point between the spring and pulley inside the metal channel, That will help us confirm if our stock balances could work for your repair or if they would need to be special ordered. Thank you!

Quick Learner from Anchorage AK

Aug 2, 2024 12:24 pm

Here are some photos of the inside of the balance.

4 user uploaded images

Casey from SWISCO

Aug 2, 2024 12:56 pm

Thanks for getting back to us. Based on your photos, you could have either the S380-21 or S385-21 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

Your stamp code would generally correspond to 2030 strength options for your replacements but they would be calibrated to support a sash between 12-15 lb. Note that both balances need to be calibrated to support the full weight of the sash. There is a chart on the product page that explains how to choose your option. Just let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.

Quick Learner from Anchorage AK

Aug 2, 2024 1:35 pm

Great - thanks Casey. I measured the bottom and it is 1 - 2/32", so I had the right model. With your help, now I have the right weight. I just ordered 2.

Chris

Casey from SWISCO

Aug 2, 2024 2:56 pm

That's great! We appreciate your business and we'll be here if you need anything else.