Duel spring operators on both sides of lower window frames

Home Owner from Vermont

Jun 10, 2020 11:05 am

I have a number of windows in our home that are now 20 years old and were made by a Canadian company that has long gone out of business. Each double hung window has double spring balances on each side. I have one window that has a broken spring that I have removed and photographed for you. I also have a smaller bathroom window that has single spring balances on both sides that have both broken and I am presently using a prop stick to hold it open. If you are able to help me with the big window i will take pictures of the smaller window and parts and we can work on that one next.

Thank You

Steven

4 user uploaded images

10 Replies

Tom from SWISCO

Jun 12, 2020 2:07 pm

Hi, Steven. I recommend our 15-191 pivot shoe and 1/2" thick Series 160 coil balance. I believe these are the parts you need to repair your window but look them over and let met know if you have any questions.

Home Owner from Vermont

Jun 12, 2020 5:38 pm

In reply to Tom's suggested replacement parts. Being a dual (2) spring arrangement, I was only able to identify a number 7 stamped on one of the two springs. Should I order (2) 7.5 pound springs and also using your website "tip" replace the ones on the other side of the frame with the same (2) 7.5# springs? I thought I would go with the heavy duty saddle shoes also. What do you suggest?

Home Owner from Vermont

Jun 14, 2020 8:21 am

Tom on closer examination under better light I was able to read the following on the coil spring that I could not find anything on before. It read as follows.
.5-31
PAT 52320
Hope this helps with my previous inquiry.
Steven

Home Owner from Vermont

Jun 14, 2020 12:07 pm

Tom this is a second window that I will need new parts for. This is a much smaller window than my first project the sash weighs 12.6 Lbs. I need to replace the 1/2 inch wide 6 lb. coil balance spring on each side. I can probably reuse the pivot shoes and saddles.
Steven

2 user uploaded images

Tom from SWISCO

Jun 15, 2020 11:14 am

Concerning the spring stamped with "5-31," that sounds like a 5 pound spring. The Series 160 springs all have strengths in pound-and-a-half increments. For examples, our S160-5 carries 5.5 pounds.

You may want to weigh that sash to be sure. Four S160-5 springs can carry 22 pounds. If that matches your sash weight then that's what you want.

Concerning the smaller balance, we will employ the same kind of math. Two 6.5 pound springs carry 13 pounds. That's a little strong compared to your 12.6 pound sash but I think it'll be fine. You probably won't notice the .4 pound difference.

Home Owner from Vermont

Jun 15, 2020 12:19 pm

Tom thank you for the quick reply. I weighed the large sash and it came in at 27.8 lbs. So I think we probably would want two 7.5 lb. springs on each side for a supporting weight of 30 lbs. Unless you think otherwise. Once I have this coil spring stuff straightened out I will place my full order with Swisco.

Tom from SWISCO

Jun 15, 2020 2:46 pm

That might be a little too strong. Instead, you may want to consider using one 6.5 and one 7.5 spring on each side. That adds up to 28 pounds of support which should be perfect.

Please let me know if you had any other questions, I'm happy to help as best as I can.

Home Owner from Vermont

Jun 15, 2020 5:11 pm

Tom thank you for all your help. That is neat that you can mix the coil weights to come up with the sash weight.
I am placing my order now.
Steven

Tom from SWISCO

Jun 16, 2020 8:28 am

I think it's neat, too! It's one of the reasons I like coil balances; they're very flexible.

Thanks for your order and please let me know if we can be of any help in the future.