G1021 15" Planer -19-
Knife Setting
4. If the knife bottoms out on the gauge block,
repeat steps 1, 2 and 3, but start on the oppo-
site side of the cutterhead.
5. The variation between one side and the other
should not be greater than 0.004". Repeat
steps 1 through 4 on the other two knives.
Again, the variation between all three knives
should not be greater than 0.004"
Once you have completed inspection on all three
knives, you will able to determine whether or not
there is a need to adjust the knives in the cutter-
head. The next set of instructions will address the
process of setting the knives.
Figure 14. Adjusting knife height.
Figure 15. Proper knife setting jig placement.
The process of setting the knives in the cutter-
head will come into play whenever you sharpen
or replace, or after determining that setting is
necessary during the initial setup.
The knives are locked into the cutterhead with
wedge type gibs. Springs under each knife pro-
vide an upward pressure to help ease the setting
process.
TO SET THE KNIVES:
1. Remove the upper cover to expose the cut-
terhead.
2. Loosen the gib bolts securing the first knife
just enough until the knife pushes upward.
3. Place the knife setting jig over the knife on
the cutterhead as shown in Figure 15. The
knife setting jig will push the knife into posi-
tion in the cutterhead.
When making adjustments, all three knives
must be adjusted the same. Do not adjust
one knife without adjusting the others as
well. Improper knife height adjustment can
result in damage to knives, poor planer per-
formance and possible operator injury.
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