- Joined
- Oct 4, 2011
- Messages
- 727
I finally took some shop time this weekend and made my first steam/air engine. I chose a double acting single cylinder wobblier.
Started with a 1.5" * 1.25" block for the cylinder.
Drilled and tapped 6-32 screws for the end caps.
Got to use a new set of center screws to mark the locations.
Caps made over size and milled down.
4 jaw chuck and starting to boring the cylinder out.
End cap back on and drilled for end bushing. To make sure it was centered with the cylinder.
Then things went to heck. I didn't have a ream the size I needed so I tried to use an adjustable ream. If anyone has notes on how to use these things I would love to know how they are supposed to be used. I fought with this evil thing for 3 hours and the hole just got worse. Ended up just re chucking it and using a boring bar. Got ok results. Next time will use a HSS cutter in a boring bar and should get better sides.
Here is final cylinder and piston. The side stub is to set tension with the backing plate.
Backing plate with holes drills and bushings in. This is before surface grinding.
Here is the final assembly.
http://www.flickr.com/photos/24370911@N08/7672863690/in/photostream
This should be a video of it running.
Have about 12 hours in this one. 3 of that was fighting with the ream. My next one should be a lot faster to make. Runs good but leaks air all over. I made this without drawings so my design may be a little off. I watched the series buy tubalcain and based mine off his notes. I could stop some of the air leaks with liquid gasket but I want be able to take it apart easily. I need to start with larger stock for the cylinder and do more bolts which will help with the leaks. Next one I will grind the piston to size and ream the cylinder.
Any hints and comments would be great.
Jeff
Started with a 1.5" * 1.25" block for the cylinder.
Drilled and tapped 6-32 screws for the end caps.
Got to use a new set of center screws to mark the locations.
Caps made over size and milled down.
4 jaw chuck and starting to boring the cylinder out.
End cap back on and drilled for end bushing. To make sure it was centered with the cylinder.
Then things went to heck. I didn't have a ream the size I needed so I tried to use an adjustable ream. If anyone has notes on how to use these things I would love to know how they are supposed to be used. I fought with this evil thing for 3 hours and the hole just got worse. Ended up just re chucking it and using a boring bar. Got ok results. Next time will use a HSS cutter in a boring bar and should get better sides.
Here is final cylinder and piston. The side stub is to set tension with the backing plate.
Backing plate with holes drills and bushings in. This is before surface grinding.
Here is the final assembly.
http://www.flickr.com/photos/24370911@N08/7672863690/in/photostream
This should be a video of it running.
Have about 12 hours in this one. 3 of that was fighting with the ream. My next one should be a lot faster to make. Runs good but leaks air all over. I made this without drawings so my design may be a little off. I watched the series buy tubalcain and based mine off his notes. I could stop some of the air leaks with liquid gasket but I want be able to take it apart easily. I need to start with larger stock for the cylinder and do more bolts which will help with the leaks. Next one I will grind the piston to size and ream the cylinder.
Any hints and comments would be great.
Jeff