20 4 and 20 3 Balance replacements : SWISCO.com

Quick Learner from WA

May 25, 2021 6:52 pm

trying to purchase two sets of replacement channels

Numbers printer are 20 4 and 20 3

I am replacing

5 user uploaded images

8 Replies

Emily from SWISCO

May 28, 2021 10:00 am

Hi there!

Could you show us your top nylon attachments?

Thank you!

Quick Learner from WA

May 28, 2021 11:06 am

is this helpful? thank you!

2 user uploaded images

Emily from SWISCO

Jun 1, 2021 8:37 am

Hi there!

For one of your balances, it looks like you have an S350 channel balance.

As for the other balance, you could have either an S380 or S385 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

For the metal channel stamped with "20 4" you will need a spring strength option of 2040.

For the metal channel stamped with "20 3" you will need a spring strength option of 2030.

If you have any other questions please let us know.

Comparison of the S378, S380 and S385 balance shoes.

Quick Learner from WA

Jun 1, 2021 3:22 pm

thank you! So two questions.

1. these pieces are from two different identical windows and I was told I should purchase both sides of the new channels (so a total of 4 channels) and I expected they all should be identical since they're the same windows, am I wrong?

2. is this 1 inch or 1 3/32 inch (question)

1 user uploaded image

Emily from SWISCO

Jun 2, 2021 9:53 am

Taking another look at your pictures, the top fitting on one of your balances looks to be damaged. Did the wings on your top fitting break off? If so, you'll need either the S380 or S385 for both balances.

It looks to be on the 1/16" mark but the tape measurer might not be evenly lined up, could you double check that measurement for us?

Quick Learner from WA

Jun 2, 2021 11:37 am

Yes, I do believe pieces most likely broke off. They are the same window. Here are a couple more pictures with the tape measure hooked & flush at the end of the one end.

3 user uploaded images

Emily from SWISCO

Jun 3, 2021 9:28 am

Your bottom attachment looks to be 1-3/32" so you would need the S385.