Casement window crank

A home owner from Miami Florida says:

I am looking to replace 3 casement window cranks. They all open from left side.

User submitted photos of a window operator.

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Tom from SWISCO responded:

I'm pretty sure we can replace this. However, there are a couple different possibilities. Before we recommend anything, can you show me a picture of the end of the arm? There should be a bearing or wheel at the end. It could be a few different styles, so seeing it will confirm for me what you need. Can you also tell me roughly how long the arm is? Thank you!

A quick learner from Miami, FL says:
Lets try..
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Tom from SWISCO responded:

I'm sorry, I don't understand. Were you able to get me those photos? Once you've taken them, you can upload them right here for us to see.

A quick learner says:
lets see if this helps . see attached
Thumbnail of the uploaded file named window operator arm measure
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Tom from SWISCO responded:

Perfect! See our 39-139 operator, this looks like a good match. The only difference is that you have reverse  mounted installation screws. With that in mind, you will also need our 33-205 threaded nut to reverse install the installation screws. I've installed these with the help of a bench vise; you  just press them into the holes at the front of the operator base.

A quick learner says:

Excellent. Thank you so much. I will order 3 sets. What's your return policy? (In case it doesn't fit) 

Also, do I need new screws or use the ones I already have?

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Tom from SWISCO responded:

Awesome, thank you! We appreciate your business. You can see our return policy here.

You should be able to reuse your old screws with no problem.

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