I've moved a Bridgeport and a ~1 ton lathe down a flight of steps into
my basement,
http://www.toad.net/~menkejg/
I used a forklift for the Bridgeport and by hand with levers and
chainhoists for the ATW lathe. Much, much easier with the forklift.
The forklift rental cost me about $350, the rental place delivered it
and picked it up. If you run into a situation like I did where you
discover the turret has to come off, then the forklift will make all the
difference in the world. Its nice to not spend the money on an
equipment rental, but doing so will save you a lot of time and wear and
tear on yourself.
The 1 HP J head weighs something close to 150 lbs, so its not hard to
handle it with one of those "2 ton" shop cranes. Also, watch out for
the weight of the table, its unexpectedly heavy. I used the trashcan
method- have a sturdy trashcan upside down with some plywood on the top
beside the table with the knee adjusted so the trash can takes the
weight of the table as it slides off the knee. Remove the gib strip
first, much easier to move the table with it out.
If you want to use the 2 ton shop crane to actually lift & move the
Bridgeport, you should first upgrade the hook and chain to something
lift-rated- mcmaster carr is your friend. DO NOT use a regular eyebolt
in the threaded hole on the top of the ram, spend the money on a lift
rated, swiveling hoisting ring.
Avoid use of pressure treated lumber for anything which needs to slide
or have stuff slid on it- PT lumber presents a lot of friction even if
you lube the surface. I imagine you could slather enough grease to make
things slide, but all that grease will also end up on you & the floor,
etc...
Don't bother with the wood rollers, get some lengths of iron pipe from
Home Despot/BLowes- get at least 5 or 6, 3/4" is OK- at least 32" long,
nothing wrong with longer except they get a little clumsy, might be a
good idea to get some 2' ones for when the long ones won't fit. As you
haul the machine around the pipes will often try to group, move around,
skew their way out the side, etc.. its helpful to have enough that you
can keep feeding in fresh ones without having to pry them out past the
back edge.
There is nothing like messing about with this kind of stuff as therapy
for being in the office all day!
Gregm
RoyJ writes:
No such luck, doorway is at the top of the 3 steps. It has to go through
and down in one motion. I'd plan to timber and plank the steps to make a
solid ramp. I have help but they are not savy about levers and
weight. I'd like to set it up so it could be done alone, then ask for
some assistance for the expected. I'll leave it on a skid.
Why wooden rollers rather than pipe? I do have a dozen or so birch
rolling pin blanks, they would roll as easy as could be, jsut would get
chewed up on the concrete.
Thanks for the offer to help but I doubt if you want to drive 1500 miles. 
rigger wrote:
First make sure you have to take the table off. Can you run the table
out to the end of the knee and work it around the corner first and then
go forward with the mill? If not then your table removal scheme sounds
correct. Perhaps add some timber (cribbing) to the floor at the bottom
of the steps so you only go down 1 or 2 (or less?) steps and onto
rollers (wooden rollers are best here) and then down to the floor in
several stages from there, removing cribbing as you go forward. If you
can get a good holdback on it to control the forward movement and one
or two husky helpers you can do it easily without the skid.
I would suggest not bothering to take off the head or overarm unless
you're without help. If you're anywhere in my neck of the woods I'd be
happy to lend a hand (100 mi. N of Sac.)
I hope this helps.
Dennis in nca