there is the shaft before splines and treads


JEAN PRUDHOMME

Hi Jean,

Looking at the “flange” end of your shaft, it might be nice to taper the splines similar to a Hirth coupling, since you will be maintaining a ‘pressure fit’ of the flange in place with your large screw-on nut. With tapered splines, there would be NO slop or backlash in that connection. Of course, it would be a lot more expensive to make! Maybe you or another person smarter than I can educate me if this concept is not what I think it to be.

Gene Kahn


The prop flange is from Durango front wheel bearing hub which I removed the trust roller bearing and the cage, this hub have already is own spline but a taper of 30 degrees as been done by the factory, with the high tensile  strength screw from truck stub and appropriate torque wrench, the shaft will be very tight to the flange and no tendency of any play between the splines but it is very important the splines have to be tight machined and the shaft heat treated at 60 Rockwell hardness.
After the first set up I will look to have the shaft made in one piece from real wheel axle company which I guess it will be over $600.00 plus, but with inside drilling it will be lighter and stronger



JEAN PRUDHOMME

Gene he might try a few set screws as Paul has illustrated if there is any doubt.

Milo


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