Building a 31/2" Gauge Locomotive Engine

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Bernd:
Nice save Stew. Your showing some good use of a faceplate and angle plate to machine stuff.

I'm interested in what's going to go inside that steam chest.

Keep up the good work. :thumbup:

Bernd

sbwhart:
Hi Bernd/Darren/Eric

Thanks for your support, I'm just finishing off the cylinder covers then I need to drill the cylinder block to take these, the next job after this will be the slide valves that go in the steam chest. I'm not quite sure when I when get onto these we're in the porcess of changing our computer system going over to a Apple Mac with a change of service providor and a home hub, so I can see myselve spending a bit of time on this, not being a computer buff I think it will be a bit of a pain :hammer: :hammer: :hammer:

I'll keep in touch through work whilst were getting new system running :coffee:

Have Fun

:wave:

Stew

John-Som:
Stew

I am finding the blow by blow account of your machining operations absolutely fascinating. I must confess that so far I have not attempted to use the face plate and angle plate method of work holding and I suspect I may be missing out.

I had come to the conclusion that when boring out cylinders it is easier to set up the block in the machine vice and bore out on the mill ? This way I can, without disturbing the position of the block use DRO co-ordinates to position and drill fixing holes. I also felt that it was easier to obtain a rigid set up on the mill than it is in the lathe. Maybe I am following the wrong route.

I would be interested in your thoughts on this.

John S

sbwhart:
Hi John

I'm pleased that you'r finding my effort of interest.

Ther's more than one way to bore cylinders, the important thing is to drop on a method that gets the best result out of the equipment you have at hand. The main advantage in using the lathe is that you can use a good stiff boring bar and take advantage of the lathe's automatic feed, boring heads don't tend to be as stiff and small mills don't always have automatic feed.

But all this is relative depending on the size of bore etc, in fact I sucessfully bored out some cylinders for small traction engines (1" to 12" scale) using a boring head, in this case I held the cylinder in the verticle slide and the boring head in the lathe spindle,

Knowing what the best method to adopt, will come with experience, and knowledge, read all you can, ask as many questions as you can, and enjoy what you do. I've been involved with machine work all my working live, but I'm always learning I supose that's what makes this game so obsorbing.

Have Fun
:scratch:

Stew

kellswaterri:
Hello all, I am inclined to agree on the lathe aspect for boring cylinders...mainly the fine feed fuction giving more control over the finish and also the rigidity of the boring cutter...I did all my cylinders on the face plate and as long as the set up is well balanced good results should be expected.
All the best for now,
John.

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