- Mar 16, 2018
- Reaction score
- Central Florida, USA
Thank you John,great design and well done
I made a few more pieces this week. The first crankshaft flywheel was made to print (1.375") and thought it looked out of scale, so made a larger 1.750" diameter one. One can also see the clutch engagement lever enhancements on the far side.
Also made the round more typical crosshead cylinder that other builders have made on this site. Thought it may be interesting to see the setup on drilling the bolt circle and how it was held to mill the slots. I could have set up the rotary table, but I used a square collet block instead. I have some fat parallels that are snug fit into the table slots and I use them for indexing squarely when a part is too tall in the vice.
After that, I drilled and tapped the 4-40 oil hole on a snug 5/8 fit arbor. Then I shortened the arbor to fit inside the bore so I wouldn't distort the crosshead cylinder when milling the mounting feature. Used a bit of lead so the brass wouldn't mar.
I was still able to hold the entire tractor in my vice to register and drill the mounting bolt for the crosshead cylinder. After attaching it to the horn plate, I made up a support similar to images that I found online. I will hold off drilling into the "boiler" shell until I make the connecting rod and crosshead. Made the crosshead cylinder support longer so it can hold the maintenance platform and future steps. Its hot and humid here in central Florida, so I'm starting to get a nice patina of rust on the tractor should add texture to the paint