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Adjusting Gibs
Gibs are tapered lengths of metal that are sand-
wiched between two moving surfaces. Gibs con-
trol the gap between these surfaces and how they
slide past one another. Correctly adjusting the
gibs is critical to producing good milling results.
Tight gibs make table movement more accurate
but stiff. Loose gibs make moving the table sloppy
but easier to do. The goal of gib adjustment is to
remove unnecessary sloppiness without causing
the ways to bind.
Gibs are adjusted with a screw on each end of
the gib, that move the tapered gib back-and-forth
to increase or decrease the friction pressure
between the sliding surfaces. The process of
properly adjusting the gibs requires trial-and-error
and patience.
Refer to Figures 70–72 to identify the locations of
the table, saddle, and knee gibs, and one of the
two adjustment screws for each.
Note: It will be necessary to remove small parts,
such as way wipers and covers, to access the gib
adjustment screws.
Tool Needed
Screwdriver Flat Head #2 .................................. 1
To adjust gibs:
1.
DISCONNECT MACHINE FROM POWER!
2.
Make sure all table/knee locks are loose.
3.
Loosen one gib adjustment screw, then tight-
en the other the same amount to move the
gib.
4.
Use handwheels/knee crank to move table/
knee until you feel a slight drag in the path of
movement. Repeat Steps 3–4 as necessary.
Model G0801/G0802 (Mfd. Since 09/15)
Table Gib
Adjustment Screw
Figure 70. Table gib adjustment screw (1 of 2).
Saddle Gib
Adjustment Screw
Figure 71. Saddle gib adjustment screw (1 of 2).
Qty
Adjustment Screw
Figure 72. Knee gib adjustment screw (1 of 2).
Knee Gib
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