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Replacing or Rotating Knife Inserts
(Helical Cutterhead Only)
Knife inserts are sharp; use
caution when working with or around them.
The knife inserts on the model PJ-882HH 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 37a. It
is advisable to rotate all inserts at the same time
to maintain consistent cutting. However, if one
or more knife inserts develop a nick, rotate only
those inserts that are affected.
Each knife insert has an etched reference mark
so you can keep track of the rotations.
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!
Make sure all knife insert
screws are tightened securely. Loose inserts
can be propelled at high speed from a
rotating cutterhead, causing injury.
Make sure the outfeed table is set level with the
knife inserts (follow steps 1 through 5 on page
19).
Eliminating “Play” in Tables
There are four set screws at the front of the
jointer – two on the outfeed table and two on the
infeed table – that will allow you to prevent
“play” in the tables. (Figure 38 shows one of the
set screws for the outfeed table.)
After a period of use, the copper tip (see item
#27, page 41) which is attached to the end of
the set screw (A, Figure 38) may become loose.
Resolve this as follows.
1. Loosen the hex nut (B, Figure 38) with a
14mm wrench.
2. Tighten the set screw (A, Figure 38) with a
5mm hex wrench. Do not overtighten the set
screw, as it may prevent the table from
being raised and lowered easily.
Figure 37a
(helical cutterhead only)
Figure 38