Help identifing type of casement crank replacement

A quick learner from Rockford, MI says:
July 11, 2023
Hello! I have some bad window cranks I would like to replace but can not find part number or make anywhere on them. Can you help me identify them please?

Chris
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Jasmine from SWISCO responded:
July 12, 2023

Thanks for writing in. Your casement operator appears to be the 39-091 ROTO Casement Operator. To determine if this is the correct replacement, look over the dimensions from the diagram below and compare them to your existing operator to determine if this is the correct replacement. The opposite handed version is part 39-092.

Dimensions for 39-091
Dimensions for 39-091

You should be aware that the arm connected to the bottom of the swinging window has been discontinued and is no longer made. You'll need to reuse that arm when installing the operator base.

The compatible crank handle is part 39-230 and you may also need to replace the spacer, part 39-557.

Alternate image for 39-557
Alternate image for 39-557
A quick learner from Rockford, MI says:
July 12, 2023

Thank you for your assistance! Have a great rest of your day!!

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Jasmine from SWISCO responded:
July 13, 2023

I'm happy to help! Please feel free to reach out with any other hardware repair questions you may have.

Have a great day.
ROTO Casement Operator
ROTO Casement Operator
39-092
$67.93
ROTO Casement Operator
ROTO Casement Operator
39-091
$67.93
Roto Spacer
Roto Spacer
39-557
$7.95
White Handle w/ Set Screw, 5/16" Hex
White Handle w/ Set Screw, 5/16" Hex
39-230
$16.45
Anatomy of a casement window
Anatomy of a casement window
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How to identify casement and awning operators
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