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G0550/G0551 15" Planer -33-
Figure 34. Tightening gib bolts in cutterhead.
5. While holding the position of the knife setting
jig, adjust the jack screws, located on each
end of the knife, until they make contact with
the bottom of the knife.
6. While holding the position of the knife setting
jig, tighten the gib bolts down again in the
cutterhead (Figure 34). Tighten the bolts
evenly from the middle, working toward the
ends.
7. Repeat these steps for the other two knives.
The chip breaker is located on the top side of the
planer and extends down around the front of the
cutterhead. Its function is to prevent tear-out or
deep, unregulated gouging as the knives remove
material. The chip breaker works by breaking the
woodchips as they are being cut by the cutter-
head. The chip breaker also deflects and expels
the woodchips away from the surface of the
board and out of the planer.
To check the chipbreaker:
1. Disconnect the machine from the power
source!
2. Ensure that the knives are properly adjusted.
3. Place the gauge block on the table directly
under the cutterhead.
4. Using a 1mm feeler gauge between the
gauge block and the cutterhead, raise the
table until one of the knives just touches the
feeler gauge. Rotate the cutterhead by turn-
ing the V-belts to be sure the knife is at bot-
tom dead center.
5. Lock the table by tightening the table lock
knobs.
6. Remove the feeler gauge and slide the
gauge block under the chip breaker. See
Figure 35. The chip breaker should just
touch the top of the gauge block. Slide the
gauge block to the opposite end of the chip
breaker and check it in the same manner.
Figure 33. Proper knife setting jig placement.
4. Place the knife setting jig over the knife on
the cutterhead as shown in Figure 33. The
knife setting jig will push the knife into posi-
tion in the cutterhead.
Chip Breaker