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G1021Z 15" Planer -19-
Figure 17. Side view with jack screws.
Knife Setting
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.
The knives are locked into the cutterhead with
wedge-type gibs and gib bolts. Jack screws under
the knives allow fine tuning to help in the setting
process.
To set the knives:
1. UNPLUG THE PLANER!
2. Remove the upper cover to expose the cut-
terhead.
3. Loosen the gib bolts until the knife is loose
in the slot. The gib bolts turn clockwise to
loosen and counterclockwise to tighten
(when facing the head of the bolt). See
Figure 17.
ADJUSTMENTS USING JACK
SCREWS
Figure 18. Tightening knives in cutterhead.
5. Adjust the screws below each end of the
knife until both feet of the gauge rest even-
ly on the cutterhead and the knife is just
touching the bottom of the middle foot of
the gauge. The gauge will set the knives at
a uniform protrusion of approximately .070"
above the cutterhead. The knife height
should vary no more than .002"-.003"
across the length of the cutterhead.
6. Maintain a constant pressure on the gauge
while re-tightening the gib bolts.
7. Repeat the same procedure on the remain-
ing knives. As mentioned before, the stan-
dard knife setting gauge is satisfactory for
reasonably accurate knife setting tasks.
4. Place the knife setting jig over the knife on
the cutterhead as shown in Figure 18. The
feet should be securely planted on the cut-
terhead. Make sure the gauge extension
rod is parallel to the cutterhead to maintain
accuracy.
Planer knives are dangerously sharp. Use
extreme caution when inspecting, remov-
ing, sharpening, or replacing knives into the
cutterhead. Substantial risk of injury!