Interesting choice of units

I calculate 1 kgf inch = 0.25 Nm or thereabouts.

4kgf at 2 inches = 8kgf inches = 2Nm
1kgf at 6 inches = 6kgf inches = 1.5Nm

Table's kind of stiff if that's at no load.

You can get more Nm out of a motor with a belt reduction but that doesn't do your top speed any favours.

Q1: Can you free the table up?
Q2: Does it matter if it's kind of slow?
Q3: Could your budget stretch to servo motors?

best

Robin