Jet Tools JJ-8CS - Manual (Page 18)

18
Sharpening the Knives

WARNING
Blades are extremely sharp! Use caution
when handling. Failure to comply may
cause serious injury!
1. Disconnect the machine from the power
source.
2. Remove the fence, blade guard and belt cover.
3. To protect the infeed table from scratches, par-
tially cover the sharpening stone with paper.
(Fig. 30)
4. Lay the stone on the infeed table.
5. Lower the infeed table and turn the cutterhead
by turning the cutterhead pulley. The infeed
table height is set properly when the stone’s
surface is flush with the knife bevel.
6. Keep the cutterhead from rotating by grasping
the cutterhead pulley while sliding the stone
back and forth across the table.
7. Take the same amount of passes for all three
blades.
When the blades have been sharpened and still are
not cutting efficiently, trying to touch up the blades
further will only cause the formation of a second
beveled edge. When this starts to happen, it is time
to replace blades with another set.
It is recommended to keep a second set of blades
on hand so that they may be installed while the first
set is being professionally sharpened.
Cutterhead Removal

WARNING
Blades in the cutterhead are sharp! Use
extreme caution when handling the removal
of the cutterhead. Failure to comply may
cause serious injury!
The entire cutterhead assembly may be removed
for cleaning or for bearing and blade replacement.
Some woodworkers keep a spare cutterhead with
replacement blades should the original cutterhead
have to be repaired.
Fig. 30
To remove the cutterhead (including bearings, studs,
and housing) from the base casting:
1. Disconnect the machine from the power
source.
2. Remove the fence assembly, cutterhead guard, and
belt guard.
3. Remove the v-belt from the cutterhead pulley.
4. Loosen set screw (A, Fig. 31) using a hex wrench
and remove the cutterhead pulley (B, Fig. 31) and
key (C, Fig. 31).
5. Remove nuts (D, Fig. 31) and lock washers (E,
Fig. 31).
6. Lift assembly straight up. Studs (F, Fig. 31) will
still be attached to the bearing housings.
7. Before replacing the cutterhead back into the cast-
ing, thoroughly clean the “saddle” and the bearing
housings of saw dust and grease so that they seat
properly.
8. To re-install the cutterhead, reverse the above steps.
Fig. 31