Adjustments; Cutterhead Knife Adjustment - Jet JJP-8BT Operating Instructions And Parts Manual

1. Loosen lock handle (J).
2. Tilt the fence (B ) back to the desired angle up
2
to 135 degrees (G). Or you can place your
beveled reference piece on the table and
against the fence, adjusting the fence until the
angle of the fence matches the bevel of your
gauge piece.
3. Tighten the lock handle (J).

11.0 Adjustments

11.1 Cutterhead Knife Adjustment

Cutterhead
dangerously sharp! Use extreme caution when
inspecting, removing, sharpening or replacing
knives into the cutterhead. Failure to comply
may cause serious injury!
Determining if adjustment is necessary:
1. Disconnect machine from the power source.
2. Remove the cutterhead guard.
Refer to Figures 16 and 17:
Note: To rotate the cutterhead the cutterhead
pulley must be turned. This requires removing the
panel on the front of the cabinet for access.
3. Rotate the cutterhead (E) until one knife is in
the 12 o'clock position. The 12 o'clock position
is the highest point a blade will reach in the
cutting arc (C, Figure 17).
4. Place the knife setting gauge (J) on the
outfeed table (F). One end of the gauge should
be positioned over the cutting knife (C)
towards the near the end of the blade (G).
Use care when handling the
knife setting gauge near the blades to prevent
damage.
Note the position of the knife blade with respect to
the gauge, then move the gauge to the other side
of the table towards the fence (H) and again note
the position of the knife blade with respect to the
gauge.
The blade must be at the same height at each end
and must also be at the same height as the
outfeed table (bottom of gauge). If this is not the
case, adjustment is required as follows:
Adjustment procedure
5. Slightly loosen six gib lock screws (A) by
turning into the lock bar (B), clockwise as
viewed from the infeed table (K).
6. Adjust the blade height by turning jack screws
(D) upon which the blade rests. To lower the
blade, turn the screw clockwise. To raise, turn
the screw counter-clockwise.
7. When the blade is at the proper height,
Repeat steps 3 – 7 to adjust the remaining blade.
Note: The most common cause for unsatisfactory
cutting performance is improperly set knives. Many
aftermarket devices are avaialable to further assist
in the accurate setting of knives.
knives are
13
alternately tighten the six gib lock screws (A).
Figure 16
C
D
E
Figure 17
B
A