Hey does anyone know what the correct name for this 4 axis set up is
called and possibly who makes it?
It looks to me like a combination of a milling attachment for a
lathe (the vertical part replaces the compound), and a 2-axis X-Y table
missing the table top.
Is it sure that the same company made both parts? The bottom
(X-Y) part looks like something which Sears sold way back when.
Note that the handwheel on the vertical leadscrew is different
from those on the X and Y axes.
On Sunday, January 13, 2019 at 11:01:39 PM UTC-5, Clare wrote:
Rube would have fun with that thing. <g> There is no way that combination of slides and clamps could stand up to a cut made with any kind of metalworking machine. It has looseness, flexing and backlash written all over it.
The top part looks like a larger version of the milling attachment on my South Bend 10L lathe, which is original equipment. In terms of relative sizes, though, the X-Y base is much larger that on the assembly in the photo.
It does look very South Bend-ish but the only details that match my
Heavy 10 milling attachment are visible end of the upright slide base
and the vise opening with square head clamping screws. The vise on
mine is part of the slide casting and the tilting joint is on the back
of the slide base.
The vertical leadscrew on mine ends in a round shaft above the same
bushing. The unbalanced removeable handle crank engages a protruding
dowel pin at about the height of the socket head screw on the right.
On Monday, January 14, 2019 at 7:45:09 AM UTC-5, Jim Wilkins wrote:
Yeah, that's the way mine works, too. It was part of the kit that came with the lathe: War Board, built for the Navy in 1945, and all surfaces on the milling attachment are machined.
But, if my failing memory serves, the milling attachments for larger SB lathes were more like the one in the photo.
Those are Atlases.
They use the same castings and dovetail sizes on several different
Someone frankensteined a 10" lathe milling attachment to the top of an X-Y
table that they removed the table from. They might have had to add a cross
slide from the 10" into the mix. I don't remember if the X-Y table had a
Paul K. Dickman
A torus is 4 dimension so you need more axis than 3.
Many shapes - saddles are multiple dimensions. Saddles are not just for
horses but holds pipe and rods. All sorts of shapes require more than
an old fashioned 3.
Try to mill a Propeller with a 3 axis - have the 3 blades cut in their
On 1/13/2019 7:25 AM, JimmyMcGill wrote:
On Tuesday, January 22, 2019 at 7:30:09 PM UTC-5, Martin Eastburn wrote:
It's not "4 dimension," but you need an additional half-axis (a rotary inde
xed"flip" to machine the back side of the donut) to machine it with a conve
ntional machine tool. It could be machined, theoretically, with a 3-axis CN
C EDM and a disk-shaped electrode, depending on the relative diameter of th
e hole in the torus. Actually, with a weirdly shaped electrode, you could d
o it regardless of hole size.
Saddles (hyperbolic paraboloids) are widely used for roofs in architecture.
The shape can be milled with a conventional 3-axis mill with continuous-co
ntouring capability and somebody who can program in something more than ord
inary shop math.
A really interesting thing about saddles is that they can be *lapped* by ha
nd. In fact, they sometimes are, when someone tries to do the three-flat la
pping trick to make flat surfaces, and they screw up the rotation sequence.
Surprise! You made a hyperbolic paraboloid without even trying! <g>
Again 3 axis and a 180-degree rotary flip of the fixture. That may not be a
n efficient way to do it, but it can be done.
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