I disassembled the column and its base. The screw is fine. The part
the screw screws into (the raising nut) is fine, also.
The column base, which holds and tracks the column, is painted on its
inside. I would have thought this inside would be clean, bare metal,
machined smooth like the column. This base may be bent or warped,
somehow, or, more likely....
The column is bent or out-of-round. It's surface is smooth with no
rust, but I sanded it, anyway, with 600 and 1000 sand paper, then
greased it and it still won't slide back into the base easily.
Pounding on it, to get it back in, is of little effect. The top half
of the column seems ok.... it slides into the base easily, so I'm
thinking the base is not the problem. It's the lower part of the
column that is tight and jamming for some reason.
I'll call Delta to see if there's any warranty remaining. I'll see if
a friend can check the roundness of the column, also.
No scratches on any of the paint, anywhere. Seems this saw hasn't
been used much. Other costs to add to it's total, so for: I put 4
locking wheels on it.... $16? An electrical outlet, wall box and
breaker... $25? Two days labor, which includes going get it in
Mobile, AL ($100 fuel?).