Spiral Balance

A from Oregon/Alaska says:

Can you recommend a replacement balance for my windows please.



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Paul from SWISCO responded:

As a matter of fact, we can! I would look at our 5/8" diameter Series 500 spiral balance. You will also want a bottom bracket like our 17-012. It looks like you will also need to open the closed end of the sash as the window will ride along the tube. 

The only thing left to figure out is the size and strength of your Series 500 balance. If you can, please give me the height of the visible glass for the sash and the overall height of the wood sash. Please also tell me the exact weight of the sash. Finally, let me know if this is for the top or bottom sash.

A professional from Portland Oregon says:
This is for a bottom sash (but truth be told, I would like to do the top one as well). The visible glass measures 15" high (two 7 1/5" panes), the overall sash height is 19 3/4" and the sash weighs 12 Pounds.

Thanks so much.

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Paul from SWISCO responded:

So roughly your glass height is 16", therefore the top sash you would add 1" to make the balance S500-17 and the bottom sash you add 3" to make it S500-19. For 12 lbs sashes use the red tip for the spring weight . Below is a generic direction for installations.

To install these balances, you would drop them from the top on the side of the sash. Use the 33-017 screw to attach the balance tubes at the top. Now, raise the sash and have someone hold it up while you attach the bottom bracket ,17-012 with the 33-090 screw while the U-shape opening corrals the spiral. With your finger bring up the spiral to the bracket and attach the 75-005 tool and turn the spiral clockwise three turns and hook it to the fork of the bracket. Repeat the other side and try the sash. If sash creeps down, raise and hold up the sash and give the balances another turn or two.

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