Hi,
This is part of my latest home designed project.  I hope the final assembly works as designed.

Machined from Aluminium in my Syil X3 Mill using Mach3, then faced off from the reverse side to final thickness in my manual mill.
 
Regards

Chrisjh

Excellent. 

What is the project that you are building Chris ??

Tweakie.

Top Secret

Here is another clue.

Below is the Solidworks Simulation Video.

I've described most of the details in the text associated with the video.

Today I made the bearing caps to go with the conrods.

I will have to make the eccentric bearing cap again because of a design flaw.  I drilled 4mm holes through 5mm thick material.  I have now changed the bearing cap design to use M3 instead of M4 fasteners.

http://www.youtube.com/watch?v=AZz3DWLOitE

More Progress.

Just completed the Cylinder Block. 

Made in 2 halves, bolted together, bored to suit 50.8 (2") Stainless Steel Tube, unbolted, insert stainless steel liner,  bolt back together and complete steam porting and cylinder head screw holes.

Next to make the Slide Valve and Valve Plate.

Regards

Chrisjh

Starting to get there now.

Found a few errors in my design that need correcting.

1.   The reciprocating crosshead bar fouls the rocker, someting I missed in the Solidworks model, during my design effort.  The solution is to add a heavy 5 x 45 degree chamfer to one corner to give clearance.

2.  I drilled and tapped the steam input port on the steam chest on the wrong side.  I've added a plug to correct my error.

Yet to make is the aluminium piston, Ertalyte (PET) piston rings, Crankshaft Bearing housing, the PTFE stuffing glands, some stiffening plates and spreader bars for the base, and some bracing for the steam inlet and drain cock plumbing.

I found a temporary flywheel I need to add to the crankshaft to test all works before making the final designed flywheel.

Regards and happy Xmas.

Chrisjh

More Progress. 

Completed the chromate conversion of all the aluminium parts, made the piston and rings, fitted everything together in a mock up to make sure I haven't stuffed up.

I painted the base cottage green & the steel components Ford Satin Black.  The brass and stainless components will remain natural.

Xmas is now taking priority so it will be some time before I can make more progress.

Below is some progress photos.  Enjoy and have a Happy Xmas and a Great 2013!!

Regards

Chrisjh

Finally got it functioning!!

Still some work to do but at least it works.

The parts that were CNC machined using Mach3 were:

Both Conrods

Lower Cylinder Head incorporating the Piston Rod Gland Stuffing Box.

All the other parts I machined manually.

http://www.youtube.com/watch?v=Xo2soYAUao4&list=UUH2jXGbTHQPG5XGYQ9FYxDA&index=1

Regards

Chrisjh

Nice work Chris 

I love steam engines.

Tweakie.

Very slick, Chris, I always enjoy watching your projects-

Thanks for sharing-
Dave