Makita N1923B, Instruction Manual

7

18.

Always use the correct dust mask/respirator for
the material and application you are working
with. 

SAVE THESE INSTRUCTIONS.

WARNING:
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product.

MISUSE or failure to follow the safety rules stated in
this instruction manual may cause serious personal
injury.

FUNCTIONAL DESCRIPTION

CAUTION:

• Always be sure that the tool is switched off and

unplugged before adjusting or checking function on the
tool.

Adjusting the depth of cut (Fig. 1) 

Depth of cut may be adjusted by simply turning the knob
on the front of the tool. 

Switch action (Fig. 2)

CAUTION:

• Before plugging in the tool, always check to see that

the switch trigger actuates properly and returns to the
“OFF” position when released. 

For tool with lock button 

To start the tool, simply pull the switch trigger. Release
the switch trigger to stop. 
For continuous operation, pull the switch trigger and then
push in the lock button. 
To stop the tool from the locked position, pull the switch
trigger fully, then release it. 

For tool with lock-off button

To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided. 
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop. 

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Removing or installing planer blades

CAUTION:

• Tighten the blade installation bolts carefully when

attaching the blades to the tool. A loose installation bolt
can be dangerous. Always check to see they are tight-
ened securely.

• Handle the blades very carefully. Use gloves or rags to

protect your fingers or hands when removing or install-
ing the blades.

• Use only the Makita wrench provided to remove or

install the blades. Failure to do so may result in over-
tightening or insufficient tightening of the installation
bolts. This could cause an injury.

For tool with standard planer blades
(Fig. 3, 4 & 5) 

To remove the blades on the drum, unscrew the installa-
tion bolts with the socket wrench. The drum plate comes
off together with the blades.

To install the blades, first clean out all chips or foreign
matter adhering to the drum or blades. Use blades of the
same dimensions and weight, or drum oscillation/vibra-
tion will result, causing poor planing action and, eventu-
ally, tool breakdown. 

Place the blade on the gauge base so that the blade
edge is perfectly flush with the inside edge of the gauge
plate. Place the adjusting plate on the blade, then simply
press in the heel of the adjusting plate flush with the back
side of the gauge base and tighten two screws on the
adjusting plate. Now slip the heel of the adjusting plate
into the drum groove, then fit the drum plate on it. Tighten
all the installation bolts evenly and alternately with the
socket wrench. 

For tool with mini planer blades (Fig. 6, 7 & 8) 

1.

Remove the existing blade, if the tool has been in
use, carefully clean the drum surfaces and the drum
plate. To remove the blades on the drum, unscrew
the three installation bolts with the socket wrench.
The drum plate comes off together with the blades.

2.

To install the blades, loosely attach the adjusting
plate to the set plate with the pan head screws and
set the mini planer blade on the gauge base so that
the cutting edge of the blade is perfectly flush with
the inside flank of the gauge plate. 

3.

Set the adjusting plate/set plate on the gauge base
so that the planer blade locating lugs on the set plate
rest in the mini planer blade groove, then press in
the heel of the adjusting plate flush with the back
side of the gauge base and tighten the pan head
screws. 

4.

It is important that the blade sits flush with the inside
flank of the gauge plate, the planer blade locating
lugs sit in the blade groove and the heel of the
adjusting plate is flush with the back side of the
gauge base. Check this alignment carefully to
ensure uniform cutting. 

5.

Slip the heel of the adjusting plate into the groove of
the drum. 

6.

Set the drum plate over the adjusting plate/set plate
and screw in the three hex flange head bolts so that
a gap exists between the drum and the set plate to
slide the mini planer blade into position. The blade
will be positioned by the planer blade locating lugs
on the set plate.

7.

The blade’s lengthwise adjustment will need to be
manually positioned so that the blade ends are clear
and equidistant from the housing on one side and
the metal bracket on the other. 

8.

Tighten the three hex flange head bolts (with the
socket wrench provided) and rotate the drum to
check clearances between the blade ends and the
tool body. 

9.

Check the three hex flange head bolts for final tight-
ness. 

10. Repeat procedures 1 – 9 for other blade.