Bob from SWISCO responded:
June 19, 2019
Thanks for posting. This looks our 15-192. This pivot shoe is compatible with our Series 170 and Series 171 Coil Springs. If you have more than one spring on each side of the sash, the Series 171 sits on top of the Series 170, with a longer tongue to reach around to connect to the shoe. If your springs don't have stamps, give us the exact weight of your window sash, and we'll be able to calculate what you need. |
Bob from SWISCO responded:
June 20, 2019
Thanks for getting back to me. We don't have any spring for the Series 170 that hold 10 lbs individually; but it's not uncommon to end up using more coil springs than you did before, depending on the age of the original springs, so that's not an issue. I would advise that you try to get the exact weight of the window sash before we go any further, however. There might be a margin of + or - 1 lb to play with, but it's really too risky to guess this otherwise, as then the coil balances may fail to support your window. If you can provide the exact window sash weight, we can go from there. Many thanks! |
Bob from SWISCO responded:
June 21, 2019
OK, thanks for confirming the exact weight for me. Just best to be safe! In this case, I would use (2) of the S170-405 5 lb Spring Weights on both sides of the window sash. This would equal 10 lbs of support on both sides of the sash, for a total of 20 lbs of support overall. Let me know if you have any other questions. |
Bob from SWISCO responded:
June 24, 2019
Ahh, let me clarify. First of all, I was wrong in my previous post. You will have (1) of the S170-405 and (1) of the S171-405 on each side of the sash. You use the Series 171 for the 'second' coil spring on each side of the sash since it has a longer tongue to reach past the Series 170 to attach to the pivot shoe. Apologies for the oversight on my part. At any rate, the coil springs would be stacked one atop the other, and would then wind or unwind as needed with the travel of the sash itself. Let me know if this makes sense. |
Bob from SWISCO responded:
June 24, 2019
In the case of these types of coil springs, you can use the 15-156 and 15-157 to house both coils individually. These will work for both the Series 170 and Series 171. |
Bob from SWISCO responded:
June 24, 2019
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