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Elmer's Fancy

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EricB:
I had so much fun making Tiny that I decided to do Fancy as well.

Day one was cutting stock for the column and cylinder, and I made the drilling jig for the steam ports. After that I turned the column to shape. I don't work with steel enough to get a good finish all the time. The tapered section turned out very coarse. Just need more practice.

Eric

EricB:
Day two, on to the mill.

The column has flats for the cylinder and crank on one side, and to clear the flywheel on the other. The flywheel side was first.

After that I started drilling some holes. The crank hole is 5/16." Now I have a drill and a 3/8" chuck, but I didn't have enough Z travel for it to fit. I figured that out after I got started of course. I went ahead and drilled the cylinder mounting hole and its counter bore, then came back and bored the crank hole to size. Then I made the crank locating pin for drilling the steam ports.

The drilling jig is made of some kind of brass that I thought was free machining. It isn't. I tryed to cut it to size with a slitting saw and it was un cooperative. It cuts OK with an end mill though.

EricB:
Day three, steam ports.

I used the same mill setup for as many operations as I could. When I made the Tiny I held all these bits in place by hand and marked the positions then drilled. This time was much easier. I had to go back and mill an extra bit of clearance for the jig. My attempt to save a few turns of the hand wheels did not work out.

The steam input is taped 3/16" MTP.

EricB:
Day four. I didn't make much, but I took all day doing it.

The crank bearing is suppose to be a press fit into the column. Well I got it snug but removeable for now. It will be held with locktite later and an oil hole drilled once I'm happy with all the fits. I reamed the bearing to size. I tried to just drill it when I made Tiny, and ended up making a reamer and another bearing. Just made the one bearing this time.

The column was cutoff after the the bearing was fit. The top of the column has an odd pattern from a slight misalignment of the cuttoff blade. We'll just call that a decorative feature for now.

The last part for today was the column foot. I don't have any steel in the size needed so it's made of aluminum. Doesn't look right but it will have to do for now. A few hours of work went into that washer.

MJM460:
Nice going, Eric.  It looks like a fun little engine to build.

MJM460

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