Elmer's horizontal mill engine.

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millwright:
Its coming together well and looking very good Abraham :clap: :clap: :clap:

John

modeldozer:
Hi all,

John, thank you for the encouragement.

Two pieces of brass plate was machined square and flat.

Steam ports were drilled in one plate.

And mounting holes drilled in both to make the valve plate and cover.

The steam chest was set up, mounting holes drilled and the pocket carefully milled out.

The steam chest parts.

After machining a small piece of brass square and to size, a pocket was milled in the one face.

It was flipped over and slots for the valve rod and nut was milled.

And after a cleanup with some emery tape.

Thanks for looking.

Cheers.
Abraham

modeldozer:
Hi everybody,

Done some of the smaller but time consuming bits.
For the valve nut a piece of flat stock was milled and lapped for a tight siding fit in the valve.

Then the ends were milled.

A broken 6mm end mill was used to locate the centre.

and the hole drilled and taped.

Test fitting the valve components.

The valve rod was set up to mill flats on the end and cut the slot for the eccentric strap. I do not have a long enough end mill for this so I used a slitting saw.

Then end was located,

and the connecting pin hole drilled.

The connecting pin was set up as best I could and the split pin hole drilled.

The assembled valve.

Next I will need to make a centering arbor and some attachments for the rotary table so the flywheel and some other parts can be finished.

Cheers :beer:
Abraham

modeldozer:
To make the arbor a piece of material was faced and centre drilled.

A MT2 dead centre was placed between this and the tailstock to set the angle for the compound.

A taper was turned on a length of rod. Here using the tailstock arbor to test the taper.

The end was turned down to 12mm and cut off.

A couple of collars were made for a tight fit on the end and a retaining washer made for the bottom end.
One collar is for locating a chuck and the other for the eccentric strap.

Mounted in the rotary table.

With the eccentric strap mounted.

And with the flywheel.

Cheers
Abraham

modeldozer:
Did not get a lot done.

The flywheel was set up on the rotab and centered.

Holes were drilled at all the comers of the cutouts.

The outer slots were milled.

I did not realize how hard (abrasive) the cast iron was and destroyed and broken a few HSS end mills. Had to finish the operation wit a carbide end mill actually meant for aluminium, this also did not survive. :bang:

To do the straight sections, I first gang drilled them and broke out the waist material.

Then started to machine the sides.

Still have to do 8 of 12 sides.

Cheers.
Abraham

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