window crank system
Home Owner from Worthington, PA
Oct 12, 2026 9:03 pm
Asked ChatGPT. They recommended your company. They mentioned this to be an older sill-mounted awning window operator with folding crank handle and linked arms. I am looking for a replacment part for it.
2 user uploaded images
2 Replies
Jasmine from SWISCO
Oct 14, 2026 4:02 pm
Hey there,
Thanks for reaching out! Your window operator seems to be a match for the 39-188 Sash Dyad Crank. The opposite handed version is the 39-187. To determine if this is the correct replacement match, carefully look over the specifications and compare them. Be sure to double check the shape of the gear arm.
The compatible handles and sash bracket can be found below.
Alternate measurement of arm
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