Dura Bar is really good stuff; it is made specifically for machining. When I was an engineer for an amateur telescope company they used it to make small weights used to balance a scope depending on different attachments like focusers and cameras, etc. They had to machine a keyhole slot in the bar and it machined very easily.
I also seem to recall one set of fabricated cylinders that had O-ring recesses between the valve and cylinder blocks; once bolted together, the Viton O-rings would last forever.
I also wonder if one of the modern Rapid prototype/ metal sintering companies could make the parts? They might need a piston liner and a valve wear plate...
Fabricated Cylinders
Moderator: Harold_V
-
- Posts: 809
- Joined: Wed May 31, 2006 2:13 pm
- Location: Laguna Niguel CA
- ironhorseriley
- Posts: 193
- Joined: Fri Apr 05, 2013 12:02 pm
- Location: Rogers, AR
Re: Fabricated Cylinders
On the DLS for sale page, a narrow gauge Porter project has been listed for sale.
http://www.discoverlivesteam.com/discov ... /index.htm
I looks like the Valve chest has been fabricated out of steel square tubing??
http://www.discoverlivesteam.com/discov ... /index.htm
I looks like the Valve chest has been fabricated out of steel square tubing??
Jim, Former railroader, fascinated by wood working & “all things engineered”.
Re: Fabricated Cylinders
There is a 4-4-0 with slide valves that I've see a few times that has cylinders made from hydraulic bottle jack bodies which were turned horizontal and had the valve seats welded to the tops. LOL. If it works.......
Ken-
Ken-
- ironhorseriley
- Posts: 193
- Joined: Fri Apr 05, 2013 12:02 pm
- Location: Rogers, AR
Re: Fabricated Cylinders
I wonder how the cylinder ends were fabricated and attached..surly threaded like a pipe fitting would not be acceptable?
Jim, Former railroader, fascinated by wood working & “all things engineered”.
Re: Fabricated Cylinders
If the wall thickness will allow, the ends would probably be attached exactly like any other locomotive cylinder. A bolt circle with studs or screws. Why would you think "pipe fitting" to close a cylinder end?ironhorseriley wrote:I wonder how the cylinder ends were fabricated and attached..surly threaded like a pipe fitting would not be acceptable?
David
- ironhorseriley
- Posts: 193
- Joined: Fri Apr 05, 2013 12:02 pm
- Location: Rogers, AR
Re: Fabricated Cylinders
It has been a while since I have seen a bottle jack disassembled, I did not know how thick the walls were. I was not sure if there was thickness to allow for studs. Many years ago, my grandfather repaired them as a retirement job.
Jim, Former railroader, fascinated by wood working & “all things engineered”.