Walter, known as Starlight Tools, wrote up how he setup his Goshen 1440 lathe with casters that lock down to the floor. I do not know if that topic survived the hacking incident or not.
I have a set of vehicle dollies that work for moving my smaller lathe around. At work, I use a pallet jack to move stuff around. If the machine is already setup for the pallet jack, great, if not, then a lot of work using toe jacks is called for at times.
Another option, if you have a smooth floor is just a nice lever works very well.
Pierre
I use the Footmaster Castors under most of my machinery and other shop items.
http://www.footmastercasters.com/
My 14x40 Lathe, as Pierre mentioned was set up with them.
http://www.hobby-machinist.com/showthread.php/844-Gosan-1440V-Metal-Lathe?highlight=footmaster It came stock with six cast iron pucks, about the size of hockey pucks, and 1/2-12 Wh levelling bolts. I used the GD-100S castors which have a M16 female thread for mounting, and took some M16 All Thread and drilled and tapped them 1/2-12 and threaded these into the castors. Then I could use the stock bolts to bolt the castors to the bottom of the lathe. Since it had six spots, I used the six castors.
I can roll the lathe around easily and once it is place, I can use the built in levelling feet to adjust the lathe so that it is 0 0 with my Starrett 98 level.
The lathe has been very stable on these castors, both when rolling and when "placed"
One added benefit was that with the lathe as it came, I had to bend over to operate it, as it was too short IMHO. Added the Footmaster castors, lifted the lathe just over 4-3/4" which put the centre height of the lathe at a much more convenient height for me.
I have also used these castors under many of my roll cab tool boxes, this way, I can level the drawers and they have a much better lock than conventional locking castors.
If the floor is really sloped, as where my 50 Ton H Frame press sits, I added a hockey puck under the levelling pad which extends the levelling range of the castor.
If I was to redo the lathe or if I was to do another lathe, I would probably go with the GD-120S castors as the internal levelling screw is much heavier than the one in the GD-100 and smaller.
Walter