Crank handle dimensions

A handy person from Grand Rapids, MI says:
June 3, 2009
Dear Sirs; The measurement of the spline on our operator is 5/16" or 10mm across. Is this going to accomodate your 3/8" rear bore or am I looking at the wrong item (39-104). There are 12 teeth on the spline. The other dimensions are close enough
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Paul from SWISCO responded:
June 4, 2009
If the spline of your window operator measures 5/16" it will not fit this crank handle. The only 5/16" crank handle available is the 39-218 t-handle, but it is for a hex shaped spline. Take a look at the included picture in this post for a much more detailed image of the 39-104 gear hole.
Close up of the gear hole of the 39-104 window operator crank handle.
Close up of the gear hole of the 39-104 window operator crank handle.
A handy person from Woodinville, WA USA says:
June 3, 2010
Our operator handle has 12 splines, and a 3/8" bore I.D. However, where your illustration shows 3-3/8" from center of bore to outer edge of handle rotator our handle measures 3-3/8", and where your illustration shows 2-5/8" overall length from bottom of hub to tip of rotator our operator measures 3-5/8". Any chance there was a mixup on your drawing? I would like to install something similar in proportion to what we are replacing.
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Dave Sr. from SWISCO responded:
June 3, 2010
Good call on that correction. We just fixed the part measurements.
Handle with a 3/8" Gear Bore
Handle with a 3/8" Gear Bore
39-104
$4.90
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