Adjusting Gibs - Grizzly G0828 Owner's Manual

Adjusting Gibs

There are two copper gibs on each end of the
upper blade base (see Figure 38). They are made
of copper so the plates wear instead of the upper
blade base. Each copper gib screws into a steel
plate and is adjusted with four set screws and hex
nuts. The set screws maintain pressure between
the copper gibs and upper blade base to keep the
movement tight and precise.
Copper
Gibs
Steel
Plates
Figure 38. Gib operation.
If the gibs are too loose, the quality of the cuts will
suffer because the movement will be sloppy when
the cutting lever is pulled down. If the gibs are too
tight, it will be difficult to lower the upper blade,
and the cutting edges of the blades may become
damaged.
The goal of adjusting the gibs is to keep the front-
to-back movement of the sliding shafts snug with-
out interfering with the sliding action.
Tools Needed
Open-End Wrench 14mm .................................. 1
Hex Wrench 4mm .............................................. 1
To adjust gibs:
1. Remove blade guard.
Model G0828/G0829 (Mfd. Since 02/17)
2.
3.
Upper Blade
Frame
(Lowered)
Qty
4.
5.
6.
7.
On each side of shear, loosen hex nuts on gib
set screws (see Figure 39).
Note: On front, two gib set screws are above
bed and two gib set screws are beneath bed.
Gib Set
Screws,
Hex Nuts
(rear)
Figure 39. Gib set screws and hex nuts.
Using wrench to keep hex nut slack, use hex
wrench to tighten all gib set screws in even
increments until gibs are snug against upper
blade base (see Figure 40). Back off each
set screw ⁄ turn and hold in place while tight-
1
8
ening hex nut.
Figure 40. Tightening gib set screw.
Make a test cut to check sliding action of
knives. If necessary, rotate set screws clock-
wise to tighten gib or counterclockwise to
loosen, then repeat test cut and adjust until
you are satisfied with gib adjustment and
shearing action.
Hold set screws with hex wrench and re-
tighten hex nuts (see Figure 40).
Check and adjust blade gap (see Page 24).
Re-install blade guard.
x 4
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