A Wallaby of my own.

[Mosey]

Nice going. Do you prefer the knee to the spindle for boring?

When I went to buy my Clausing, at the end of a 100 mile drive for a machine that was "perfect", the guy had an old junk vice clamped to the table. I asked to remove the vice and guess what? There was a helicopter landing pad right in the middle of the table. Not too deep. So I brought it home anyway. Doesn't affect the work, just hurts when I see it. I have never kissed a mill table. Not even a scratch. Keep up the good work.

M.

[steamer]

The quil has 3" of travel...I need 3 5/16"......

So I'll raise the knee.

[Don1966]

Looking good from here Dave, and I perfer using the knee to using the quill. Fact is my DRO is on the knee anyway.

[steamer]

Thanks Don! ....While I wait for the JB to harden up...I'll scroung around for a block of aluminum for the head and maybe square it up

Dave

[steamer]

Squared up a block for the head.....ill spare you the picture...
Im laying out the head in cad tomorrow to plot the cuts for the cooling jackets.
dave

[arnoldb]

Looking good there Dave 

  Seems the Droid wants to highlight the mechanical properties; maybe it's jealous.

Kind regards, Arnold

[steamer]

Well...here's what the process will be...starting with a squared block












These next two will be used to make a fixture to radius bore the ports with a ball mill




Thats the plan!

Dave

[Tennessee Whiskey]

Well, them is some real purty piccys, now how bout some parts? . Even Jo can "draw up some parts in them there fancy draw'n programs. . Boy, I'm full of it tonight. Video Please!

Yo Redneck,
Eric

[Captain Jerry]

Hey Dave!

Radius bore with a ball mill!  What you talkin' 'bout?


Jerry

[steamer]

Hey Dave!

Radius bore with a ball mill!  What you talkin' 'bout?


Jerry

Ahhh...perhaps he's on to my cunning plan!....you can't bore a curved hole he says!.....are ya sure?

All will be revealed!...

Dave

[Captain Jerry]

Yeah!  That's what I thought you meant.  Watching closely.  I understand the process but the setup will worth seeing.

Jerry

[steamer]

I will be mounting the head to a fixture plate that puts the center of the arc of the passage at the center of a rotary table.  I will then modify a ball endmill by grinding back the shank leaving the hemispherical end on a long skinny shank...I'll drill through undersize...to give some chip clearance...and then mill the passage on the rotary table....that's the plan at least....

Eric....with parts like this...I like having a process sheet planned out...in this case, I did that by adding features to a squared up block...so I'm modeling the same way I'm making it...lets me plan things out for different set ups....in a 100 years or so, with some practice... I'll be like George and make it all look so easy

Dave

[steamer]

And technically...I need to put the valve cages in before I cut the intake and exhaust passages.

The intake is siamesed to a common 1/2-40 threaded port....in the middle of the head...

Finicky part!....I'm looking forward to the crank!

Dave

[swilliams]

Looking good Dave. What CAD program are you using?

Steve

[steamer]

This one is Solidworks....lunchtime engineering project....

Dave