Pushing forward .........
![ThumbsUp :ThumbsUp:](https://www.modelenginemaker.com/Smileys/default/ThumbsUp.gif)
A couple of more notes on the cylinders. The 1/4-20 mounting holes on each end of the cylinder need to be inline with each other. A simple fixture made from a squared up piece of aluminum with the
bolt pattern to match the cylinder and orientated to the fixture edge.
![](https://i.postimg.cc/Prb3bhfF/IMG-1138.jpg)
Cylinder head in place.
![](https://i.postimg.cc/NjpdV4H6/IMG-1133.jpg)
Next up are the pistons. Made from 303 stainless steel and will have a fit to the cylinder bores with .0005" per side clearance. The pistons are 2.000" in diameter and 2" long.
After rough turning the O.D. the counterbore in the end of the cylinder was cut to depth followed buy a rough drilling to depth for the rod end slot.
![](https://i.postimg.cc/Y0X25Q2v/IMG-1140.jpg)
A final finish cut to size on the O.D.
![](https://i.postimg.cc/rp6y2VTN/IMG-1141.jpg)
Set up at the mill in my mounted 4 jaw chuck with brass shim protecting the piston diameter. Center of the piston dialed in.
![](https://i.postimg.cc/zBFGk99S/IMG-1142.jpg)
Using a 5/8" end mill to cut the slot for the connecting rod.
![](https://i.postimg.cc/Kjcvp0bX/IMG-1144.jpg)
Checking for width with adjustable parallel . Final width will be .750".
![](https://i.postimg.cc/TY4YQjHS/IMG-1145.jpg)
Indicating the finished slot for drill and reaming for the wrist pin. The wrist pin will be a 5/16" dowel pin.
![](https://i.postimg.cc/vZx8K1Jm/IMG-1147.jpg)
Drill and ream for the wrist pin.
![](https://i.postimg.cc/Gh2mkgzG/IMG-1148.jpg)
Set up to add two 8-32 taped holes for set screws to hold the wrist pin.
![](https://i.postimg.cc/66zQ4xVB/IMG-1149.jpg)
Drilling and tapping.
![](https://i.postimg.cc/s2pjVkDd/IMG-1150.jpg)
That's it for now.
![Cheers :cheers:](https://www.modelenginemaker.com/Smileys/default/BeerChug.gif)
Headed to N.A.M.E.S. this weekend. Hope to have fun displaying some of my other builds.
![Cartwheel :cartwheel:](https://www.modelenginemaker.com/Smileys/default/happy-132.gif)