SWISCO - The Replacement Hardware Authority

Casement window crank

A quick learner from California says:
Original crank removed from a mountain cabin built in 1930. Stamped on base of crank ""J S Thorn Co, Philadelphia".

I see one Thorn crank on your website; it is different than the this one. My crank is as follows:

1. Has 3 mounting screws, two on outside (two on the left side for the left-hand crank; two on the right side of the right-hand crank). The crank casting is threaded (no nuts) and the screws enter from the exterior side of the window.

2. For left-hand crank, the two screws on left side are separated by 7/8"; the distance between the two OUTSIDE screws is 4 3/8",

3. The crank casting is semi-circular (no flat edge on either side). IT is DIFFERENT in this respect to the 39-004 Thorn shown on your website).

4. The Thorn 39-004 has an arm measurement of 8 1/4". The measurement for my crank (from pivot point/axle) is 10 1/2"; however, my crank has a slightly different style of the end of the arm than the 39-004.

I need both a left-hand and right--hand crank.

Thank you!
Randy
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Tom from SWISCO responded:
Thanks for posting, Randy. At this point, I think it'd be best if we saw a few pictures of your operator. We would especially need to see a few pictures of the housing and the tip of the arm, to see how it's different. Let me know!
A quick learner from California says:
Hi, Tom:
I don't have pictures, but I've just traced the crank onto a piece of 8 1/2 x 11 paper. The end of arm is slightly difficult to represent, but my drawing is very close.
I hope this helps.
Randy.
User submitted a diagram of a window operator.
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Tom from SWISCO responded:
Ah, I recognize this operator. Unfortunately, it is no longer made. The closest matches we have are our 39-003 & 39-004. You will just have to swap out the track to our 39-504. Check out this older discussion for more information.
A quick learner from California says:
Thanks, Tom, for your excellent help! I've ordered a left and right crank along with two of the tracks. Best regards!

Randy.
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Tom from SWISCO responded:
No problem, Randy! Let me know if you need anything else, we'd be happy to help.
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