On 14-Oct-2005, "bremen68" wrote:

Two thoughts.....If you have four casters (and I could be out in left
field here) that are rated for 150 # each and move the machine
laterally and hit a crack in the floor or something that stops the
wheels you have now transferred the load onto two of the four wheels,

If the floor isn't flat, the load can shift to two of the wheels. If you
move the tool fast enough, you could get it up on one wheel on an uneven
floor, but that's pretty extreme.

I wouldn't go with anything less than 300lb capacity. If the machine is
not nice and symmetric, the load will be to one side and the capacity
would need to higher than 300lb.

You'll also have to add the weight of what's on the machine if it is
used with casters in place.

Mike