18
Figure 19. Typical SHOP FOX® cutterhead.
Knife Replacement(W1723)
The Model W1723 Planer is equipped with both
springs and jack screws for knife adjustment.
Springs allow adjustments to be made quickly,
while jack screws are more accurate. Both
methods are covered below. The W1724 does
not use adjustable knives.
JACK SCREWS support the knives from
underneath. By threading the jack screws in or
out, you can precisely control the knife height.
See Figure 19 for identification.
To replace and adjust the knives using the
jack screws, do these steps:
1. UNPLUG THE PLANER!
2. Loosen the gib bolts and remove the gib
and old knives. Remove all of the springs
and place them in a plastic bag and save
them.
3. Place the new knives, gibs, and gib bolts
back in the cutterhead as they were before
removal. Make sure the knives are resting
on the jack screws when you install them.
4. Place the knife setting jig on the
cutterhead so both feet sit solidly on the
body of the cutterhead.
If the knife does not allow the jig to sit on
the cutterhead evenly, raise or lower the
knife with the jack screws to adjust as
needed.
5. Snug gib bolts 5 and 4 shown in Figure 20
to hold the knife in position.
6. Tighten the knives by following the
“tightening” instructions on Page 19.
SPRINGS exert upward pressure under the
knives while wedge-type gibs and gib bolts lock
the knives in place. See Figure 19 for
cutterhead assembly identification.
To replace and adjust the knives using the
springs, do these steps:
1. UNPLUG THE PLANER!
2. Lower the jack screws completely to get
them out of the way.
3. Remove the gib bolts, gibs, and the old
knives and install new knives.
4. Loosely install the gibs and gib bolts so the
knife will move upward from the pressure
of the springs.
5. Place the knife setting jig on the
cutterhead so both feet sit solidly on the
cutterhead and so that the center of the
jig pushes down on the knife (similar to
Figure 18).
6. Place equal pressure on both ends of the
jig so the jig is parallel with the cutterhead
and the knife is set.
7. Snug gib bolts 5 and 4 shown in Figure 20
to hold the knife in position.
8. Tighten the knives by following the
“tightening” instructions on Page 19.
WEAR thick gloves when
working near planer
knives. Otherwise you can
be severely cut!
ADJUSTMENTS