Here is the latest iteration on the hollow 4130 steel hydroformed output

shaft.

The low stress prop flange and prop pilot are aluminum and slip over the

steel prop

drive pins.

Paul Lamar

Paul, while I agree with the technical merits of your shaft design, we
simply disagree on the cost and manufacturability of it for the low volumes
involved.   I'd love to be wrong so if anyone wants to build a lower cost
drive using this shaft, they have my blessing.

Tracy Crook

OK what is your target price for the shaft and I will see what I can do?
Send it to me private email. I will look down the road for the
long term cost as the demand is ever expanding.

Before you commit yourself to the concept lets wait until Dan runs
the FEA. I will also spend some more time on the engineering vis
a vis the proper needle bearings to select. I will run some life calcs.

We will do an NC lathe prototype on the shaft. There are a zillion NC shops here
in the LA area.

Paul Lamar
 
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