Coradco casement window cranks

A home owner from Louisville KY says:
Are the cranks for these window interchangeable, both for left and right opening windows?
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Tom from SWISCO responded:
Thanks for posting. The 39-156 cannot work on both sides. The opposite side is our 39-155 casement operator.
A home owner from Carmichael, ca says:
Are the cranks the same for coradco Windows regardless the size of the window ? And I need one that opens to the left and one which pushes out straight on double arms
Thanks
Andrew
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Tom from SWISCO responded:
Not necessarily, no. It's always important to compare physical details such as design and measurements to ensure that you get the right part. That's the only way to be sure.
A quick learner from washington says:
are CORADCO CRANKS interchangable with any other brand ?
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Tom from SWISCO responded:

Not in my experience, no. You don't want to try to substitute your operators with something else. Unless you have an old part that's simply not made anymore, you want to use exactly what you have now with no alterations.

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