Identifying Replacement Channel

Question

Hi there,

I would like some help in identifying the appropriate replacement channels for my sliding window.

The stamp is for KP Caldwell 1940 so I'm pretty confident that this would be the 1940 option.

Looking at others posts, I've found the following two likely items:

The 1940 option is the one I would be getting but the part I'm having the most difficulty with is measuring whether I need the 1" or 1 3/32" for the balance shoe diameter.

I'm likely going to have to purchase both but any help from the experts would be appreciated. Thanks.

Jasmine · Accepted Answer

Hello,

Thanks for writing in! Your channel balances could possibly be the S380-20 or the S385-20, as you've mention but there is also another option. To determine which replacement is the best fit for your window, I'll need to see a photo of the pulley system in the center of the balance, where the spring and the string meet.

In regard to measuring the shoe depth, if the shoe is over 1" you can eliminate that as an option. Take a look at the diagram below for reference.

Comparison of the S380 and S385 balance shoes.