Rear Mount casement operator

A home owner says:
Not sure of length needed or if they come in different lengths. From the interior looking out the operator is on the left side. The hinge is a Anderberg, but not sure what the operator is. Thanks for any help you can offer.
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Jasmine from SWISCO responded:

Thanks for reaching out! Your casement operator appears to be the 39-022 rear mount operator. The opposite version is part 39-023 and it is available in white. Carefully review and compare the dimensions to your existing operator to determine if this is the right replacement. You'll also want to confirm that the wheel on the same is the same. The compatible crank handle would be part 39-114L.

Dimensions for 39-022
Dimensions for 39-022

Detail view of 39-022
Detail view of 39-022

A home owner says:
Would like to check the arm thickness and the roller diameter on the 39-022. The one I have shows both the arm and roller are 9/16 inches. The roller is also made of stainless steel. Thank you
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Jasmine from SWISCO responded:

The roller measures 17/32" in diameter and the arm thickness measures 5/8. Also, the roller is stainless steel.

I would recommend double checking the measurement of your roller. If you are still getting a measurement of 9/16", you might need to consider changing the track on the roller connects to. The two compatible tracks would be 39-504 and 39-520

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