Jet 54A Operating Instructions Manual page 5

Fig 9
Support long workpieces with helping
roller stands or table extension.
Operating notes:
Always use sharp cutter knives!
Check workpiece for foreign objects
(nails, screws) and for loose knots.
Feed with thicker workpiece end at the
front, hollow side downward.
Plane the stock with the grain, if
possible.
You get a better surface when planing
several passes with less chip removal.
Switch machine off if no further
planing is to be done immediately
afterwards. Cover the cutter block with
the cutter block guard.
Workpieces shorter than 200mm may
not be processed.
For the authorized use of the
machine observe the appendix A
"safe operation"
(on the last pages of this operating
manual)
A1: Planing, stock thickness below
75mm
A2: Edge jointing
A3: Planing of narrow gibs
A4: Planing of short stock with push
wood.
7. Changing cutter knives
The cutter knives may only be
changed when the mains plug is
pulled!
Risk of personal injury by cuts from
the cutter knives. Wear suitable
gloves when changing cutter knives.
Move cutter block cover to front and
fence to back.
Turn the four square-hear bolts of the
cutter knife lock bar all the way in
(wear gloves!).
At first remove cutter knife, then cutter
knife lock bar from the cutter block.
Clean all surfaces of cutter block and
cutter knife lock bar with a suitable
solvent (do not use cleaning agents
that could corrode the light metal
components).
Use only suitable cutter knives
conforming the technical specification
and EN 847-1
Unsuitable, incorrectly mounted, dull,
cracked of bent cutter knives can work
loose or increase the risk of kickback
considerably.
Always replace all three cutter knives
at once.
The cutter knife lock bars are
balanced to each other and thus can
randomly be placed.
Only cutter knives marked "HSS" or
"HS" can be resharpened!
When resharpening, remove the same
amount of material from all three
cutter knives, otherwise a balancing
error may cause damage to the
bearings.
Cutter knives can only be resharpened
down to a minimum width of 12 mm.
Use genuine Jet replacement parts
only.
Place the cutter knife lock bar in the
cutterblock´s groove. Turn the four
square-head bolts so far that the
cutter knife will just slide in.
Insert a sharp cutter knife and adjust
position with the cutter knife lock bar,
so that neither protrudes over the
edge of the cutter block.
Fig 10
7
Adjust the knives according to the
knife setting gauge (B, Fig 10) resting
on the outfeed table.
When turning the cutter block, the
adjustment gauge must move with the
cutter block knife to the second arrow.
To turn the cutter block use the pin (D,
Fig 10) supplied with the machine.
Fig 11
Micro adjust the jack screws with a
3mm alan key (C, Fig11).
To tighten the cutter knife, start
tightening with the two outer bolts. Do
not extend the tool (A, Fig11) when
tightening the bolts, do not tighten
bolts by striking the wrench.
Reset fence and cutter block guard
8. Maintenance and inspection
General notes:
Read these notes before you start any
maintenance or inspection work.
Carry out maintenance, cleaning and
repair work only when the motor is
switched off and machine has come to
a full stop. Pull the mains plug!
Clean the machine regularly
Inspect the proper function of the dust
extraction daily.
Defective safety devices must be
replaced immediately.