I know that it has been a while since I've posted but life has been bound and determined to interfere with my shop time lately. The good news is that I have made some pretty good progress. There's enough that I think I will split this into 2 posts. Let's get to it. The next part I made was the cylinder head. I turned down some hex bar.
Next I used a round over bit as a form tool to shape the dome on top
Then I superglued the head onto the cylinder and then centered it up in the mill using my coaxial indicator.
Then I used my DRO's bolt circle function to drill the mounting holes to depth. This is the first time I've used it and it worked like a charm.
After separating the pieces I drilled out the holes in the head to clearance size.
Then the cylinder holes were tapped.
That completes those pieces. On to the piston. The original design has you peen the rod onto the piston. I'm not a fan of peening so I decided that I would go with a threaded piston. I turned the piston almost to size and drilled and tapped the center.
Next I made the piston rod. A piece of drill rod was turned down and threaded to fit the piston.
The part was flipped over and drilled and reamed to take the set screw that joins it to the big end.
Next it screwed the rod into the piston and used it as a mandril to take the piston to size.
It was time to make the big end. In this design,it's made from brass hex and screwed to the piston rod. I started by drilling and reaming the bore.
After parting the piece off and cleaning it up it was over to the mill where I drilled the hole for the piston rod.
Then it was tapped to match the piston rod.
That's it for this post. My next post will cover making the whistle and the start of my flywheel adventure. That should get me caught up.
Tony