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Tom from SWISCO responded:
February 12, 2019
Thanks for posting! Your pivot shoe looks like our 15-045. Your spiral balance, meanwhile, should be either our Series 900 (3/8" diameter tube) or Series 600 (5/8" diameter tube). I'm afraid I can't make out what your tube diameter is on your photo, but it will only be one of these two options. |
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Tom from SWISCO responded:
February 12, 2019
Hello! Happy to help. There are no left and right pivot shoes, so the 15-045 will work fine regardless of which side it's on. As for the spiral balance, you should be okay rounding up. 34" should be a good replacement option. |
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Tom from SWISCO responded:
February 12, 2019
It was my pleasure! Let us know how it works out. |
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Tom from SWISCO responded:
February 21, 2019
Sorry to hear you're having trouble. That shouldn't be happening. I note that you ordered the White Tip color option, which is our lightest option. Can you confirm the exact weight of your sash for me? I think the spring calibration might be the culprit, but if not, then knowing your sash weight will at least eliminate that as an option. Just to be safe, I'd also like to know the length of the inner spiral rod for your old balance. |
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Tom from SWISCO responded:
February 25, 2019
A White Tip color option for a balance in this size should still support 21 pounds. So it's definitely not a matter of spring calibration. The only other thing I can think is that the inner spiral rods might be too short. Without the old balances to use as a reference, it's impossible to confirm if this is an issue. Would you happen to have an identical window in the house that still has its old balances? You could measure those. If not, then all we can do is guess. Assuming that inner spiral rod length is the issue, then the solution at least is easy. You'd simply redrill a new mounting hole a little under the original (maybe 1"). I think what might be happening is that when you close the sash, the spiral rod is being extended past where it was designed to be and straining the spring. My hope is that if you lower the balance as a whole, this will alleviate the strain and the balances will work properly. This is just an educated guess, though. I'm sorry we cannot give a more confident suggestion. |
