Replacement Part for Folding Casement Window Crank

Home Owner from Macungie, PA Near Allentown

Nov 20, 2016 11:33 am

I'm looking to replace a folding window crank, which has problems with the tension pin coming out of the crank. It's white and has a 2108 model number. Based on my research, it appears to be a 5/16". I've included several pictures that will hopefully elucidate which replacement part is required. Please get back to me at your earliest convenience.

Thanks,
Jeff

User submitted image of their window hardware.

5 Replies

Paul from SWISCO

Nov 21, 2016 1:19 pm

Can you confirm the diameter of the spline? I think it might be more like 11/32", rather than 5/16". If so, I recommend our 39-205.

Home Owner from Macungie, Pa

Nov 21, 2016 3:10 pm

Paul, thanks for the reply. As far as I can tell, the diameter is exactly 5/16" from the outer edge of one tooth to the outer edge of the tooth on the opposite side. Plus, I found the following figure online, which appears to show the same type of spline, which is also 5/16". Does the tooth configuration have anything to do with the physical size.
Thanks, Jeff

Home Owner from Macungie, PA

Nov 21, 2016 4:01 pm

I opened the window, and the operator is a Truth, but I can't tell the model no.

Paul from SWISCO

Nov 22, 2016 12:09 pm

The tooth configuration doesn't really have any bearing on the size, no. All of our 5/16" spline we have that isn't hex-style is our 39-274, but this is specifically meant to work on only one kind of operator, which is not what you have. Truth has only ever used 11/32" sized splines in my experience.