I am ready to order a 29 inch spiral tip window balance.
Part S600-29.
My current windows have a black plastic part at the top of the balance.
the balance is inserted into this black part and all held together with one screw.
I dont see this part on your website.
I have attached pictures. One is a picture from a window with no issues.
The other two pictures are of the part. Mine is cracked.
Do you have this part? Is it needed?
Spiral Tip Window Balance

Home Owner from Illinois, USA
Aug 16, 2022 6:05 pm
3 user uploaded images
4 Replies

Tom from SWISCO
Aug 18, 2022 11:03 am


Hello! This looks like the old Acorn stop. See our 55-063. I believe this is just the part you were looking for, but let me know if you had any questions.

Tom from SWISCO
Aug 18, 2022 12:21 pm


The Series 600 is compatible with many, many different pivot shoes. The 15-118 is one of them, but there are others.
Like you said, though, you want something that's the same size as the original. You also have to make sure that the center cam takes the same size/style of pivot bar.
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