Heinrici type stirling

Gallery, Projects and General > Project Logs

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MikeA:
Hello Dean,

Just found this thread and am enjoying your very nice craftsmanship - amazing stuff. Went through your website and got a number of ideas - I have an Atlas 618 and now have a Maximat V10P but can't bring myself to give up the little 618 - have to find a place to set up more equipment!

Best,
Mike

Brass_Machine:
Wow Dean those parts look great! :bow:

Even your swarf is neat! I mean look at how clean that is!

--- Quote from: Dean W on May 15, 2010, 01:28:07 AM ---

--- End quote ---

Eric

Rob.Wilson:
:lol: :lol: :lol: :lol: :lol: :lol: yep my thoughts :lol: :lol: :lol: :lol:

--- Quote from: Brass_Machine on May 15, 2010, 05:08:08 PM ---Wow Dean those parts look great! :bow:

Even your swarf is neat! I mean look at how clean that is!

--- Quote from: Dean W on May 15, 2010, 01:28:07 AM ---

--- End quote ---

Eric

Cheers Rob

--- End quote ---

Dean W:
That's a bit of swarf porn fellows. Best I can manage, anyway.

Thanks again for such nice remarks!

Dean

Dean W:
A few more shots today, good people.

Turning/boring the cylinder liner. It's about two inches long, and I did the boring first, then went to work on the
OD. I put a piece of very wet paper towel in the finished bore to stop it from singing. That drives me crazy.

That's it, done. I made it for a .0005" interference, put the liner in the freezer and the cylinder in the toaster oven
at 300° f for 10 minutes, then pushed them together. About halfway into the cylinder the brass started warming
up fast, and I had to use a little arbor press for the last bit. Wasn't sure I was going to get it in.

But I got it run home with a bit of grunt on the press handle.

The piston is made of graphite, and I didn't have a collet to fit, so made a quick split collet from aluminum. The position
was marked in the chuck so I could get it back in the same place, then it was taken to the mill and slit.

Then I could hold the piece of graphite firmly without worrying about crushing it. After it was bored
and turned to a snug fit in the liner, I finished it off with a piece of index card.
I kept the shop vac nozzle over the tool post while cutting this piece. Helped quite a bit, but still
had a light coat of black dust everywhere.

That'll be it for today. Here's the cylinder with its liner, the piston, and the split collet used to hold it.

Thanks for checking in!

Dean

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