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Really, anyone who works in metal eventually needs a lathe. But they cost money.
I will try to build this one with very little money.
Using the drill press to turn the chuck and shaft so i can cut the end of the shaft down to 1/2 inch, to mount sprockets on with stock bushings.
The light is making the shaft look tapered, but it's not.
Here's the standard 1/2 inch id axle collar on it.
I had cut a shoulder into the collar, which was ~1 inch od, to seat and center the ~0.9 inch id of the sprocket.
Here's the same hub, with a 36 tooth bike sprocket welded onto it. The set screw in the hub fits into a divot on the axle, in a way the hub is pulled onto the axle. This also holds the rear bearing in place. I may add a smaller 2nd sprocket.
Here's two pics of the sprocket on the axle, with the chuck at the opposite end.
And here's two pics of the chuck/axle assembly visegripped in some resemblance of where they may go on the finished frame. The frame is 1ft by 2ft. You can see the electric scooter motor i'll use to turn the chuck. The big hoop in the background is one of the big boat ribs in a turning jig.
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