Broken worm gear

A home owner from 01238 says:
May 27, 2021

Hi, the worm gear on the right window is stripped. Probably something I did. The pictures are of the left window as it is easier to get to. I believe the part I need is the mechanism to which the crank is attached. Here's hoping you can help me out.

I think you will be able to read some of the part numbers if you enlarge the attached photos. If there is any more data I can supply just let me know.

Steve

Thumbnail of the uploaded file named window 1.jpeg
Thumbnail of the uploaded file named window 2.jpeg
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Tom from SWISCO responded:
June 2, 2021

Hello, Steve! It sounds like you need a new casement window operator. We should definitely be able to help, I'm just not sure about what size you need. We have a couple different products in this style, but they vary in size.

Start by looking at our 39-155 and 39-156. These are the same part, just designed for opposing sides. Review our dimensions and let me know if they match up, or if they differ in any way.

Dimensions for 39-155
Dimensions for 39-155
A home owner from 01238 says:
June 2, 2021
I'm excited! I will do the measurements and let you know.

Steve
A home owner from 01238 says:
June 3, 2021
Hi Tom, I have some results.

The existing unit looks similar to the one in your photo but there are differences. First there is the photo named short arm.jpeg. This seems considerably shorter than the one in your photo. The photo named long arm is the bottom view of the longer arm shown in your dimensioned photo. This picture is included because it has a part number stamped on it. Hope that helps.

The other difference I see is that the pivot point of the long arm is pretty much right behind the centerline of the worm gear and not offset as in your diagram. See photo long arm pivot and worm.jpeg

The length of the long arm to it's pivot point is about 9". see photo long arm length.jpeg

Let me know what else you need. We'll get there.
Steve
Thumbnail of the uploaded file named short arm.jpeg
Thumbnail of the uploaded file named long arm.jpeg
Thumbnail of the uploaded file named long arm pivot and worm.jpeg
Thumbnail of the uploaded file named long arm length.jpeg
Profile picture of Tom
Tom from SWISCO responded:
June 3, 2021

Thank you! Since your link arm is a little under 3", I would change my recommendation to the 39-333 and 39-334. I think you'll find these match up much more closely.

As for the pivot point, don't worry about that. Its exact position will actually change as you crank the operator.

DImensions for 39-334
DImensions for 39-334
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-155
$29.85
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-156
$29.85
Egress Operator, Extra Short Link Arm
Egress Operator, Extra Short Link Arm
39-333
$37.10
Egress Operator, Extra Short Link Arm
Egress Operator, Extra Short Link Arm
39-334
$37.10
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