Thanks Bill. The next piece was the crankshaft. The elderberry design calls for a one piece crank while Elmer uses a 2 piece design. Going into this build I was one in four for the single piece cranks. I decided to try again figuring I could convert to to a 2 piece Elmer style crankshaft if I screwed it up. I faced the end of the supplied bar and then center drilled it.
Then turning between the chuck and the tailstock center, I thinned down the shaft.
With bated breath I parted off the piece. And no "tink" or bending.
Then I turned it over and cleaned up the back side.
Then it was over to the mill to drill and tap the hole for the crank pin.
The last thing I did is to mill a flat onto the shaft. Looking at the pic I had the part out way to far and I could have bent it during this operation. I won't do that agin.
The next piece I worked on was the eccentric strap. This is the most advanced thing I have done on my rotary table so far. I started by laying out the part
Then I took a piece of sacrificial scrap and drilled and tapped it for 10-32 hold downs.
Then using my laser I picked up the center of the large hole. That would be the datum for this piece.
The hole was then drilled.
And then bored to size.
The other 2 holes were then drilled.
Then I turned 2 bushings. One for the large hole and one for the center.
Then the eccentric strap was mounted to the scrap.
Then I mounted the scrap onto my rotary table tooling plate. I realized that the tooling plate had a 10-32 hole in the center so I replaced the screw in the large bushing with a stud and nut. That made aligning everything easy.
Then I milled out the shape followed by some cleanup on the die filer.
The last piece for this weekend was the flywheel. I decided to go with an Elmer style flywheel. I started by facing both sides of the blank and then marking out where the rebate would go.
Then using my round profiling tool I cut the rebates.
Then the center was drilled and reamed.
Then it was over to the mill to drill and tap for the set screw.
Then the flywheel was mounted on a mandril and placed in the collet chuck. The outer edge was trued up and turned to final diameter.
I'll end this weekend's post with a family shot
Tony