I have Weatheseal windows and need replacement cranks

Hello,

I would recommend starting by comparing the specifications of the 39-171 and 39-172 to your casement window operator. 

As for your awning window, your photo reminds me of the 39-348, which is used with the 36-078 shoe studs that are sold separately. Take a look and compare the specifications below to your original hardware and let us know if you have any other questions. Thank you! 

Dimensions for 39-172

detail of 39-348

Dimensions for 36-078

Dimensions for 36-078

Thanks for getting back to us. If you think that the 36-078 shoe stud may differ from yours, we'd be happy to look into this further but we would need to see detailed photos of your original stud detached from the track. Please also write out any dimensions that differ from the ones shown above. Though I still believe that the 36-078 looks like the part in your photos, seeing additional images would help us confirm if a better match is available.

Thank you for clarifying, Unfortunately, the spline shown in your photo that attaches the handle to the operator base is not designed to be replaced. Once this part breaks, the entire operator would need to be swapped out. 

Unfortunately, the 36-078 shoe studs do not come preattached to the 39-348 operator. You may be able to reuse your original shoes and, if not, they would need to be purchased in addition to the operator. 

The 39-171 does not use an attachment. The link arm connects to the bracket attached to your sash as shown in your first photo. If you're referring to the brackets, past customers have used the 39-545 and 39-546 with this assembly but you should be able to reuse the originals if they are still in good condition.