Steel casement window crank

A contractor from Cypress says:
I am looking for Extra Heavy Duty Crank and Rail to replace the existing crank for steel window which is very old and very stuck.
We replaced the original cranks with the ones you see in the photos, however most of them were broken because it is not strong to open heavy window especially when start to open. We replaced over 150 cranks and most of them did not last more than an year. Could you recommend something more strong made of steel or stainless steel rather than aluminum? As this facility is detention facility, we do not need handle. Instead, we need separate opener with long handle.
Thanks,
Steel casement window crank
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. I'm not sure if we have hardware that will replace this old operator. I've made a list of potential replacement parts on the right side of this page, but these are all just educated guesses. You will need to carefully go over our dimensions, pictures, and information to confirm which, if any, will work.
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