Aircraft Machine tools Armor Horizontal Milling Machine

I am really happy with this milling machine!

Armor horizontal milling machine
click thumbnails for larger versions

It was manufactured by the Aircraft Machinery Corporation in Burbank California, probably sometime in the late '40s early '50s.

The tooling is quite nice, including:

  • A shop made vertical head that mounts on the overarm and has its own motor that mounts on the opposite end.
  • A selection of end mills for the Vertical head (which only accepts 3/8" shank tools).
  • A 7/8" horizontal arbor, and an overam support (which is missing the cotter that locks it to the over arm, so there is a project right there).
  • A 7/8 inch stub arbor that screws onto the spindle.
  • A bunch of cutters of various sizes and shapes.
  • A really nice shop made boring head that threads directly onto the horizontal spindle.
  • A nice swiveling vice.
  • A home made power feed for the x-axis. This one is a great bit of rube-goldberg engineering, and I am curious to see if it works.

From what I can tell the spindle has a #2 Morse Taper internally, and what looks like 1 1/2" x 8 TPI threads externally.
 The long MT2 arbor for the horizontal has a threaded draw bar, but the other end of it is just a straight shaft. The overarm support has a bronze bushing that it fits in, but there is a lot of play. The previous owner (or a previous owner) made a little pointy stub that forms a dead center to rest against the arbor, but I would be concerned that it does not provide enough support against side forces during cutting. Obviously I have some work to do.

There is a lot to learn about using it, but I have already made some new T-nuts for the Jet lathe cross slide just using the stub arbor with a plain milling cutter in it.