Replacing Or Rotating Knife Inserts (Helical Cutterhead Only); Jointer Table Lock Handle Adjustment - Jet JPJ-12B Operating Instructions And Parts Manual

7. Insert the lock bar (G) and tighten just enough
to hold it in place.
Repeat steps 3 - 7 for the other two knives.
The knives must now be adjusted as described in
sect. 10.4, Setting Knives at Correct Height and
Parallel to Outfeed Table.
10.6 Replacing or Rotating Knife
Inserts (Helical Cutterhead Only)
Refer to Figure 18:
Disconnect machine from
power source before
adjustments. Failure to comply may cause
serious injury.
Cutterhead
dangerously sharp. Use extreme caution
when inspecting, removing, sharpening, or
replacing knives into the cutterhead. Failure
to comply may cause serious injury.
The knife inserts on the model JPJ-12BHH are
four-sided. When dull, simply remove each insert,
rotate it 90° for a fresh edge, and re-install it.
Use the provided star point screwdriver to remove
the knife insert screw. See Figure 18. It is
advisable to rotate all inserts at the same time to
maintain consistent cutting. However, if one or
more knife inserts develops a nick, rotate only
those inserts affected.
Each knife insert has an etched reference mark
to keep track of the rotations.
An extra set of ten knife inserts and knife insert
screws are included with your JPJ-12BHH.
Figure 18 – Helical Cutterhead
(Model JPJ-12BHH Only)
making any
knives are
16
Important: When removing or rotating inserts,
clean saw dust from the screw, the insert, and the
cutterhead platform. Dust accumulation between
these elements can prevent the insert from
seating properly, and may affect the quality of the
cut.
Before installing each screw, lightly coat the
screw threads with machine oil and wipe off any
excess.
Securely tighten each screw which holds the knife
inserts before operating the planer. Knife inserts
should be torqued to approximately 50 to 55
pound-inches.
Make sure all knife insert
screws are tightened securely. Loose inserts
can be propelled at high speed from a rotating
cutterhead, causing injury.
10.7 Jointer Table Lock Handle
Adjustment
Refer to Figure 19:
For best performance, the jointer table lock
handles (C) should be approximately in the fully
down position when in the locked position. If
adjustment is required:
Disconnect machine from
power source before
adjustments. Failure to comply may cause
serious injury.
1. Disconnect machine from power source.
2. Unlock the lock handles (C) and raise the
table to the upright position.
3. Loosen locking nut (B) with a 19mm open
wrench.
4. Adjust the table locking shaft (A) in
increments of 1/4 turns or less. Turn
clockwise to tighten
performance and counterclockwise to loosen.
5. Tighten the locking nut (B).
6. Test locking function and repeat if necessary.
making any
the lock handle