Need new balances

A handy person from Seattle Washington says:

I have 3 different sized windows all needing new balances whiar in some way are different. 1 by one the springs are snapping.

1st one is a 25" long metal piece 1/2 inch wide 2430F BSI stamped on the balance. The top plastic piece in photo has a small tab in the middle and no groove on the inside of it. I need 8 of these because I am gong to just replace all of them now even though some still work.

The next one is 19 inches long with 1830T BSI stamped on it.

The top end plastic piece does not have a tab in the center and has a small groove on the plastic facing inside the metal groove. I need 4 of these. I have another one but it is so different will send it in a separate contact letter. Thanks Linda

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Paul from SWISCO responded:

Hi- thanks so much for posting! 

From your photos, it looks like you have Series 385 side load balances with our 19-005 top and our 15-004 (1-3/32" depth) bottom balance fittings attached. Please compare our measurements and information to yours to be sure though.

If everything matches up, you would order S385-25 balance with a spring weight (2430) and S385-19 balance with a spring weight (1830).


A handy person from Seattle Washington says:
Thank you for the earlier letter. I will order 8 of both sizes. This is the third one we have but it has a different type of clip and top plastic piece. I will need 8 of these as well. The metal piece is 10-5/8 inches long with numbers 10 1 and letters B.S.I. PA stamped onto the metal. The channel is 1/2 inches wide. The bottom piece is identical to the other ones. As soon as I hear back, I will order all of them at once. Thank you
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Tom from SWISCO responded:

Great, I'm happy to help! We can replace this new one, too, though it will have to be a special order. I'll email you an order ink for 8 of them. You can use this order link to add the special balance to your cart along with the other balances, that way you can order them all at the same time.

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