-30-
Model G0939/G0940 (Mfd. Since 12/20)
Figure 26. Insert rotating sequence.
The helical cutterhead is equipped with indexable
carbide inserts that can be rotated to reveal any
one of their four cutting edges. If one edge of the
insert becomes dull or damaged, simply rotate it
90° to reveal a fresh cutting edge, as shown in
Figure 26.
Items Needed
Qty
Torque Wrench .................................................. 1
T-Handle Torx Wrench T-20 .............................. 1
Heavy Leather Gloves ................................1 Pair
Light Machine Oil............................... As Needed
To rotate or replace a helical cutterhead insert:
1. DISCONNECT MACHINE FROM POWER!
2. Remove dust chute and dust shroud (see
Figure 27).
The carbide inserts are very sharp and
can quickly cut your hands. ALWAYS use
caution and heavy leather gloves when
handling these parts to reduce the risk of
personal injury.
4. Remove any sawdust or debris from head of
insert, Torx screw, and surrounding area.
5. Remove Torx screw and insert, then clean all
dust and debris from both parts and pocket
they were removed from.
Note: Proper cleaning of insert, Torx screw,
and cutterhead pocket is critical to achieving
a smooth finish. Dirt or dust trapped between
insert and cutterhead will raise insert, and
make marks on your workpiece when planing.
Tip: Use low-pressure compressed air or
a vacuum nozzle to clean out cutterhead
pocket.
6. Rotate insert 90° and install so that a fresh
cutting edge faces outward (see
Figure 26).
— When all four insert cutting edges have
been used, replace insert with a new one.
Always position insert reference dot in
same position when installing a new insert
to aid in rotational sequencing.
7. Lubricate Torx screw threads with a very
small amount of light machine oil, wipe
excess off, and torque screw to 50–55 inch/
pounds.
Note: If too much oil is applied to the threads,
excess oil will attempt to squeeze out of the
threaded hole and raise insert during installa-
tion, bringing it out of height alignment.
8. When finished, re-install dust shroud and
dust hood.
Dust Shroud
Dust Chute
Figure 27. Components to be removed to
access helical cutterhead.
3. Put on heavy leather gloves to protect your
fingers and hands.
Rotating/Replacing
Cutterhead Inserts
(G0940)
