Window channel balance spring

Handy Person from Florida

Jan 16, 2017 7:01 pm

The numbers on the spring is 29 s lv cmc 7
I don't see any other numbers
I need a set of two. One for each side of window
I have other windows that have issues, but have not taken them apart.
When I figure out the part number thing, I'll work on those.
Thanks for your help
Chuck

User submitted photos of a window balance.

5 Replies

Handy Person from Florida

Jan 16, 2017 7:33 pm

Upon further reading I need a S351-29?
The weight of the window, how close do you need to be?
Can you tell anything about the weight from the stamped numbers?
Which are; 29 S LV CMC 7

Thanks

Paul from SWISCO

Jan 19, 2017 2:45 pm

Thanks for po sting, Chuck. Check out our Series 395 channel balance, I think this may be what you want. I recommend weighing your sash on a scale to determine the best spring strength option.

Quick Learner from Florida

Jan 21, 2017 9:43 am

What length do I need? 29 or 30
The metal portion measures 30", but the stamped number is 29 S LV CMC 7

Tom from SWISCO

Jan 24, 2017 11:50 am

If your stamp starts with 29, then the length should be 30". That is normal. The stamp is not a direct representation of any physical dimension, it just indicates what the strength rating of the spring is. In regards to your stamp, it looks like it reads "29 6," not "29 S." We have a chart on the S395-30 store page that shows you how much weight each stamp option of ours can support. You may want to weigh your sash on a scale to confirm the best match.