Casement Window operator replacement

Question

I'm looking to replace casement window operators for casement windows installed in late 50's. They are operated with square key stock bent into a crank. with a rotating metal spinner for fingers to rotate the crank. The operator has an arm about 12" long that slips into the track mounted horizontally across the sash near the bottom, on the inside of the window. There is a half round cut-out to connect the operator arm to the track on the window. The operator body is mounted to the window sill with two vertical wood screws on each end. The operator gear box are are 2" long (not including the mounting tabs)by 1& 1/4"wide", thickness does not matter. I don't find any markings on existing units.
The units are flat sides, top and bottom with tabs extending on each end with two screw holes each for mounting.

I need thirteen Operators

Charles E

Dave Sr. · Accepted Answer

Charles, this is just a shot in the dark, but take a look at the 39-268 operator. This operator was used on early wood casement windows. See if this is the part you are looking for, and let us know.