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Backlash is the amount of play found in a lead screw. It can be found by turning the cross slide handwheel in one direction, then turning the handwheel the other direction. When the cross slide begins to move, the backlash has been taken up.

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Backlash is adjusted by tightening or loosening the screw shown in =`^li\+*.

1 of 3 Cross Slide Gib

Adjustment Points

Cross Slide

Backlash

Adjustment

Cap Screw

=`^li\+*%Cross slide adjustment.

This screw draws a wedge-type nut against the lead screw and main nut. If it is too tight, loosen the screw a few turns and tap the cross slide a few times with a rub- ber or wooden mallet. Then turn the handle slowly back and forth until the handle turns freely. To readjust the backlash, rock the handle back and forth and tighten the screw slowly until the backlash is at between 0.001" to 0.002" as indicated on the handwheel.

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When adjusting gibs (=`^li\j++Xe[+,), the goal is to remove sloppiness in the ways without causing the slides or half nut to bind. Loose gibs will cause a poor finish on the workpiece and wear the slide. Tight gibs will damage the slide, lead screw, and half-nut. The cross slide gib is a tapered piece of iron. When the opposing front and rear gib adjustment screws are turned in opposing directions, the screws force the tapered gibs to fill the void in the way, thus tightening the play in the cross slide. If more play is needed turn the screws the other direction.

For the three saddle gibs (=`^li\++), loosen the jam nuts and turn the three set screws until slight tension is felt and the gib plates are slightly pre-loaded against the underside of the flat-way. Tighten the jam nuts when fin- ished.

3 Compound Rest Gib

Adjustment Points

=`^li\++%Gib adjustment points.
Half Nut Gib
Adjustments
Points
(Thread Dial
Removed)
3 Saddle Gib	J<IM@:<
Adjustment Points

=`^li\+,%Half-nut saddle gib locations.

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