Paul from SWISCO responded:
June 15, 2016
Hello! There should have been an outer tube over this balance. There may be part of it still attached at the top. Manufacturers use the diameter of this outer tube to determine the size. If it's 5/8" or 9/16", then I recommend our Series 600 spiral balance. If it's 3/8", we recommend the Series 900 instead. As for determining the correct weight rating, you will need to weigh your sash on a scale.
I'm not sure what your jamb issues may be. Could you show me a picture? That would help clear things up. |
Paul from SWISCO responded:
June 23, 2016
Our balances look like that on the inside, too. The only difference is that our outer tubes are metal, not plastic. You will need to try your best to measure the size of your outer tube to find the best match.
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Paul from SWISCO responded:
June 27, 2016
Hey, Steve. It sounds like you're measuring the circumference of the tube. The important measurement is its diameter.
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Paul from SWISCO responded:
July 26, 2016
Thanks! If the outer tube's diameter is 9/16", then I recommend our Series 600 spiral balance.
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