Elmer's horizontal mill engine.

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Manxmodder:

--- Quote from: vtsteam on May 31, 2015, 09:19:58 PM ---Looks Great!!!! :clap: :clap: :beer:

ps. I had a tough piece of cast iron I couldn't drill. I stuck it in the orange embers in my woodstove for a bit and cooled it slowly in a bucket of wood ashes to see if I could anneal it, and sure enough, it softened right up and was a pleasure to work on the lathe with HSS tools. Haven't tried it on anything else since, but it did work that time.

--- End quote ---

I am currently building a Bengs Nick flame licker engine and when trying to drill the flywheel bosses I find they have been allowed to cool to quickly and as a consequence both have hard spots in the bosses.

I am going to heat them up to bright red and wrap them in glass wool insulation to anneal them to a machinable state.....OZ.

vtsteam:
Oz, would the glass wool melt?

Manxmodder:
I'm only using it wrap them in after the torch has been switched off,but I think I'll just try it with a sample of scrap steel first to be sure.......OZ.

modeldozer:
For the arm of the eccentric strap a piece of 3mm flat was machined flat on the one side and then the other side was set up with a shim on the left edge to machine it aper.

The wide end was machined square, using some aluminium wire to hold the part centered.

A hole was drilled in the other end.

The pieces were set up and silver soldered.

The joint was cleaned with a file and sand paper and the narrow end was rounded with a file.

All done.

And installed on the engine.

For the cylinder a piece of cast iron was faced on both ends.

The cut line was marked all round with a slitting saw.

The cut was completed with a hack saw and face milled. It was rotated 90deg. And the operation repeated.

The mounting holes and exhaust passage was drilled in one face.

The valve passages and mounting holes was drilled, milled and taped in the other face.

It was reset on end, making sure it was square in all directions, and the end machined to size. The centre of the cylinder was located and centre drilled, and the two cylinder head holes that are in line were drilled.

The same was done on the other end. Then it was set at an angle and the steam passage to the end of the cylinder was drilled.

And the other side.

To bore the cylinder I opted for doing it on the milling machine as it is more ridged than my lathe. Started by step drilling to 20mm and the switched to the boring head.

Only needs one finishing cut and the on to the lathe to turn the ends.

Cheers
Abraham

vtsteam:
Some really helpful fabrication demos there. I particularly like the slitting saw grooving out the rough piece to be hacksawed. I definitely will find a use for that in the future. :thumbup: :clap: :beer:

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