Casement handle troubles

Question

I recently bought a new home that has several casement windows. The crank handles are missing, so I cannot open the window and don't know what brand they are. We've tried several crank handles and none are the right size. I see that you have three spline sizes, maybe more. 11/32, 5/16 and 3/8. Are there any other sizes? Is there a way to determine, or at least narrow down the spline without the crank handles?

Thanks.

Tom · Accepted Answer

Thanks for contacting us! There may be other spline sizes, but if there are then they would be so uncommon that we can safely ignore them. There is a very good chance you have one of the three sizes you named.

Do you know the name of the manufacturer who made your windows? That would offer a clue. Check the operator arms and base for any branding, as well.

Finally, whether or not you can find any names, I recommend that you show us a photo of the operator. Seeing a clear picture of the complete mechanism, including the base and arms, would give us a pretty good idea of what you're working with and what we can use to replace your handles.