Vertical lathe machine adjustment method of the clearance of the horizontally moving screw nut of the vertical tool post is as follows:
Pull out the vertical lathe machine claw of the lock washer "B" and rotate the nut "A" to make the nut "C" move axially. The vertical lathe machine nut "D" does not move. Because the vertical lathe machine axial positions of the two nuts move relative to each other, the threaded joint gap can be adjusted.
After adjusting the gap, buckle the claw of the lock washer in the groove of the nut "A" to avoid loosening.