Tom from SWISCO responded:
March 30, 2017
Thanks for posting. This could be either the Series 380 or Series 385 balance depending on the depth of the shoe. It looks like you just gave us the wing width, but the depth is what's different between them. This is the heel-to-toe measurement. For the top sash guide, see our 18-161.
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Tom from SWISCO responded:
March 31, 2017
The stamps have no bearing on the Series. I'm not sure why you would order the Series 385 for one and the Series 380 for the other, unless the nylon attachments are different between each one.
If both shoes are 7/8", I think the Series 380 may be what you want. The shoe that comes with this is 1" deep. I suspect yours was originally 1" deep, and simply wore down with time. We have detailed pictures and dimensions for both of the balances we mentioned. I highly recommend looking through our information to make sure you have the right thing. |
Tom from SWISCO responded:
April 5, 2017
Well, let's see. Going back to your first post, you have a 30" long balance for a 30 pound sash, and a 37" long balance for a 23 pound sash. For the 30" balance, I'd recommend the 2950 option, which can carry a sash weight of 28 through 32 pounds, according to the chart on the S380-30 store page. For the 37" long balance, I'd recommend the 3640 option, which can carry 23 through 30 pounds, based on the S380-37 chart.
Stamps like the 2950 and represent heavy duty springs, which is why they cost a bit more. Once upon a time we had to have these custom made, since they were extra strength, but we have since made them more convenient to purchase. |