Powermatic 60HH - Manual (Page 16)

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10. The tightening process should continue at
least two more times, each time tightening
the screws more on all three knives. On the
third time, they should all be firmly
tightened.
Before starting the jointer,
make sure all gib screws are firmly
tightened. A loose knife thrown from the
cutterhead can cause severe or fatal injury.
11. After replacing knives, the outfeed table
must be checked and adjusted so that it is
level with the high point of the knives. See
“Setting Outfeed Table” on pages 18-19.
Replacing and Rotating Knife Inserts
(Helical Cutterhead Only)
Knife inserts are extremely
sharp; use caution when working with or
around them. Disconnect power.
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.
Two star-point screwdrivers are provided. Insert
one screwdriver into a screw to hold the
cutterhead stationary, while using the other to
loosen and remove a knife insert screw. See
Figure 19. 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 that are affected.
Each knife insert has an etched reference mark
so that you can keep track of 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
may be propelled at high speed from a
rotating cutterhead, causing injury.
Make sure the outfeed table is set level with the
knife inserts See “Setting Outfeed Table” on
page 18-19.
Figure 19
(helical cutterhead only)