Makita 1912B User manual

110 mm (4-3/8”) MODEL 1912B
Planing depthPlaning width
INSTRUCTION MANUAL
-
No load speed Overall length Net weight
(RPMI
DOUBLE
IN SU LATlO N
110 mm (4-318“)
SPEC IF I CAT1 0 N S
2 mm (1/16”) 16,000 355 mm (14”) 4.2 kg (9.3 lbsl

IMPORTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING: WHEN USINGELECTRICTOOLS, BASICSAFETY
PRECAUTIONSSHOULDALWAYS BE FOLLOWEDTO REDUCE
THE RISK OF FIRE, ELECTRIC SHOCK, AND PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
1. KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
2. CONSIDER WORK AREA ENVIRONMENT. Don't use power tools in damp
or wet locations. Keep work area well
lit. Don't expose powertools torain.
Don't use tool
in presence of flammable liquids or gases.
3. KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact tool or extension cord.
4. STORE IDLETOOLS. When not in use, toolsshouldbestored in dry, andhigh
or locked-up place
- out of reach of children.
5. DON'T FORCETOOL. It willdothejob betterand safer atthe ratefor which
it was intended.
6. USE RIGHT TOOL. Don't force small tool or attachment to do the job of a
heavy-dutytool. Don't usetoolfor purposenotintended; for example, don't
use circular saw for cutting tree limbs or logs.
7. DRESS PROPERLY. Don't wear looseclothingorjewelry. Theycanbecaught
in moving parts. Rubber gloves and nonskid footwear are recommended
when working outdoors.Wear protective hair coveringtocontainlong hair.
8. USE SAFETY GLASSES. Also use face or dust mask if cutting operation is
dusty.
9. DON'T ABUSE CORD. Never carrytoolby cordor yank it todisconnectfrom
receptacle. Keep cord from heat, oil, and sharp edges.
IO. SECURE WORK. Use clamps or a vise to hold work. It's safer than using
your hand and
it frees both hands to operate tool.
11. DON'T OVERREACH. Keep proper footing and balance at all times.
12. MAINTAINTOOLS WITH CARE. Keep tools sharp and cleanfor better and
safer performance. Followinstructionsfor lubricating and changingacces-
sories. Inspecttoolcords periodicallyand
if damaged, haverepairedbyautho-
rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.
13. DISCONNECTTOOLS. When not in use, beforeservicing, and when chang-
ing accessories, such as blades, bits, cutters.

14. REMOVEADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keys andadjustingwrenches are removed from tool beforeturning
it on.
15. AVOID UNINTENTIONALSTARTING. Don't carry toolwithfinger onswitch.
Be sure switch is OFF when plugging
in.
16. EXTENSION CORDS. Make sure your extension cord is in good condition.
When using an extension cord, be sure to use one heavy enough to carry
the current your product will draw. An undersized cord will cause a drop
inline voltage resulting
in loss of power and overheating. Table 1 showsthe
correct size to use depending oncord lengthand nameplateampere rating.
If in doubt, use the next heavier gage. The smaller the gage number, the
heavier the cord.
TABLE 1 MINIMUM GAGE FOR CORD SETS
0- 6
6
- 10
10 - 12
12
- 16
I
Total Length of Cord in Feet
18 16 16 14
18 16
16 16 14
14 12
Not Recommended
l4 I ;;
I 0 - 25 I 26 - 50 I 51 - 100 I 101 - 150
Ampere Rating
More Not More
Than Than AWG
17. OUTDOOR USE EXTENSIONCORDS. Whentoolisusedoutdoors, use only
extension cords intended for use outdoors and
so marked.
1%. STAY ALERT. Watch what youare doing, use commonsense. Don't operate
tool when you are tired.
19. CHECK DAMAGED PARTS. Before further use of the tool, a guard or other
part that
is damaged should be carefully checked to determine that it will
operate properly and perform itsintendedfunction. Check for alignment of
movingparts, bindingof moving parts, breakageof parts, mounting, andany
other conditions that may affect its operation. A guard or other part that
is damaged should be properly repaired or replaced by an authorized serv-
ice center unlessotherwise indicatedelsewhere inthis instruction manual.
Have defective switches replaced by authorized service center. Don't use
tool
if switch does not turn it on and off.
20. GUARDAGAINST ELECTRIC SHOCK. Prevent body contact with grounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.
21. REPLACEMENT PARTS. When servicing, useonly identicalreplacement parts.
22. POLARIZEDPLUGS. To reduce the risk of electric shock, this equipment has
a polarized plug (one blade is wider than the other). This plug will fit in a
polarized outlet only one way. If the plug does not fit fully
in the outlet,
reversethe plug.
If it stilldoes notfit, contact aqualifiedelectriciantoinstall
the proper outlet. Do not change the plug in any way.
3

VOLTAGE WARNING: Beforeconnecting the tool toa power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplateof the tool. A power source
with voltage greater than that specified
for the tool can result
in SERIOUS INJURYtothe user - as well as damage to
the tool.
If in doubt, DO NOT PLUG IN THE TOOL. Using a power source with
voltage less than the nameplate rating is harmful to the motor.
ADDITIONAL SAFETY RULES
1. Rags, cloth, cord, string and the like should never be left around the work
2. Avoid cuttingnails. Inspect for and remove allnailsfromthe workpiece before
3. Handle the blades very carefully.
4. Be sure the blade installation bolts are securelytightened before operation.
5. Hold the tool firmly with both hands.
6. Keep hands away from rotating parts.
7. Before using the tool on an actual workpiece, let it run for a while. Watch
for vibration or wobbling that could indicate poor installation or a poorly
balanced blade.
8. Make sure the blade is not contacting the workpiece before the switch is
turned on.
9. Wait until the blade attains full speed before cutting.
area.
operation.
IO. Keep at least 200 mm (8") away from the tool at all times.
11. Always switch off andwait for the bladestocome toacomplete stopbefore
12. Neverstickyour finger intothe *tp chute. Chutemayjam whencuttingdamp
13. Do not leave the tool running. Operate the tool only when hand-held.
14. When leaving the planer, switchoff and set it with the front base up on a
15. Always change both blades or covers on the drum, otherwise the resulting
any adjusting.
wood. Clean out chips with a stick.
wooden block,
so that the blades do not contact anything.
imbalance will cause vibration and shorten tool life.
SAVE THESE INSTRUCTIONS.
4

Removing or installingplaner blades
CAUTION
:
Always be sure that the tool is switched off and unplugged before removing or installing
the blade.
The blade
is secured with four bolts. Re-
move the inner two bolts entirely with
the socket wrench and loosen the outer
two bolts two turns each.
When
you install new or sharpened 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/vibrarion will result, caus-
ing poor planing action and, eventually,
tool breakdown.
Screw the blade onto the adjust plate,
slip
it into the groove on the drum, then fit the
drum cover on over
it. Fasten with hex
flange hd. bolt. See Fig.
When properly installed, the side of the
blade should be flush with the outside edge
of the rear base.
Hex. flange hd. bolt I
Plat
Adjust plate
CAUTION :
Tighten carefully the planer blade installation bolts when attaching planer blades to the
planer.
A loose installation bolt can be dangerous.Always check to see they are tightened
securely.
5

Using blade gauge for even blade setting
Although the blade protrusion for desired cutting depth
is easily obtained by turning the
front knob, the setting of the blade itself in relationto the work may require adjustment.
This
is done conveniently with the blade gauge provided.
First, remove the blade from the tool by unscrewingthe hex bolts. Now
set the blade on
the gauge base
so that the cutting edge of the blade is perfectly flush with the inside flank
of the gauge plate. Loosen the screws on the adjust plate, then simply press in the heel of
the adjust plate flysh with the back side of the gauge base and tighten the two screws on
top. This insures that your blade tip will be
set properly when remounted inthe tool so as
1) Set blade tip flush with inside flank of
2) Press in heel of adjust plate flush with
3) Tighten two screws on the adjust plate
gauge base.
back side
of gauge base.
to hold blade in place.
Adjust plate
Planer blade
Inside flank
of gauge base
Gauge base
I
For the correctplaner blade setting
Your planing surface will end up rough and uneven, unless the blade is set properly and
securely. The blade must be mounted
so that'the cutting edge is absolutely level, that is,
parallel to the surface of the rear base. Below are some examples of proper and improper
settings.
(A) Front base (Movable shoe)
(B) Rear base (Stationary shoe)
Correct
setting
Nicks in
surface
Gouging
at start
Gouging
at end
6
Although this side view cannot show
it, the edges of the blades runperfectly
parallel
to the rear base surface.
Cause
: One or bothblades fails to have
edge parallel to rear base line.
Cause: One or both blade edges fails
to protrude enough in relation
to rear base line.
Cause: One or both blade edges pro-
trudes
too far in relation to
rear base
line.

Adjusting depth of cut
Depth of cut may be adjusted by simply
turning the knob on the front of the tool.
Switchaction
To start the tool, simply pull the trigger.
Release the trigger to stop. For continuous
operation, pull the trigger and then push in
the lock button.
To stop the tool from the
locked position, pull the trigger fully, then
release
it.
CAUTION :
Before plugging in the tool, always check to see that the trigger switch actuates properly
and returns tothe
"OFF" positionwhen released.
Planingoperation
First, rest the tool front base flat uponthe
workpiece surface without the blades mak-
ing any contact. Switch on and wait until
the blades attain full speed. Then move the
tool gently forward. Apply pressureon the
front of tool
at the start of planing, and at
the back at the end of planing. Planingwill
be easier if you incline the workpiece in
stationary fashion,
so that you can plane
somewhat downhill. The speed and depth
of cut determine the kind of finish. The power planer keeps cutting
at a speed that will
notresult injamming by chips. For rough cutting, the depth of cut can be increased, while
for
a good finish you should reduce the depth of cut and advance the tool more slowly.
7

Chamfering
To make a cut as shown at the right, align the "V" groove in the
front base with the edge of the workpiece and plane
it as shown
inthe figure (A).
Sharpening planer blades
Always keep your bladessharp for the best
performance possible.
Use the sharpening
holder to remove nicks and produce
a fine
edge.
First, loosen the two wing nuts on the
holder and insert the blades (A) and
(B)
so that they contact the sides (C) and (D).
Then tighten the wing nuts.
l\\\\\\\\\il
I theedge of theworkpiece.
L
8

Immerse the dressing stone in water for 2
or 3 minutes before sharpening. Hold the
holder
so that the blades both contact the
dressing stone for simultaneous sharpening
at the same angle.
MAINTENANCE
CAUTION :
Always be sure that the tool is switched off and unplugged before attempting to perform
inspection or maintenance.
To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspection and
replacement, any other maintenance or adjustment should be performed by hRakita
Authorized or Factory Service Centers, always using Makita replacement parts.
9

ACCESSORIES
CAUTION :
These accessories or attachments are recommended for use with your Makita tool specified in this
manual. The use
of any other accessories or attachments might present a risk of injury to persons.
The accessories or attachmentsshould be used only in the proper and intended manner.
0Planer blade
Width : 110mm (4-3/8")
Part No. 793008-8
0 Dressing stone
Part No. 794061-7
0 Extension guide set
Part No. 191725-8
0 Screwdriver
Part No. 783002-8
0 Blade gauge
Part No. 123062-2
0 Planer blade
(Material : Tungstencarbide)
Width
: 110 mm (4-3/8")
Part No.
793009-6
0 Guide rule
Part No. 164371-0
0 Sharpening holder assembly
Part No. 123055-9
0 Socket wrench
Part No. 782209-3
10

Oct -13-‘94 US
110 mm (4-3/8”)
POWER PLANER
Model 1912B
Note: The switch and other part configurations
may differ from country to country.
11

~
1 1 Cord 27 2
2 1 Switch 28 2
3 1 Handle Cover 29 1
4 3 Pan Head Screw M4x28 !With Washer) 30 1
5 1 Pan Head Screw M4x40 !With Washer!
6 1 Name Plate 31 1
7 4 Rwe10-5 32 1
8 2 Brush Holder 33 1
9 2 Carbon Brush 34 1
10 1 Pan Head
Screw M4x40 lWith Washer) 35 6
11 2
Pan Head Screw M4x14 IWith Washer) 36 1
12 1 Rear Cover
37 1
13 1 Knob 50
38 1
14 1 Flat Washer 10 39 1
15 1 Main Frame
40 1
16 1 Screw M5x10 41 1
17 1 Compression Spring 18 42
1
18 1 Rubber Packing
43 1
19 1 Front Base
44 1
20 6
Pan Head Screw M5x20 lWnh Washer) 45 1
21 1 Rear Base 46
1
22 1 Baffle Plate 47
1
23 1 Rubber Pin 4 48 2
24 1 Ball Bearing 608LLB 49 4
50 2
25 1 Rubber Pin 4
26 1 FIELD ASSEMBLY 51 8
MAKmA LIMITED ONE YEAR WARRANTY
Pan Head Screw M5x65 [With Washer E Bond!
Retainer
lns~lation Washer
ARMATURE ASSEMBLY
IWifh Items 24. 29 & 31 - 331
Fan 68
Dust Seal 10
Ball Bearing 6200LLB
Bracket
Pan Head Screw M4x30 IWith Washer)
V-Pulley 4-24L
Belt Cover
Pan Head Screw M4x14 !With Washer!
VPulley4-38
Ball Bearing 600022
Washer 10
Drum
Washer 12
Ball Bearing 620122
Rubber Pin 6
RubberPin4
Adlusting Plate
Pan Head Screw M4x5
Drum Plate
Hex Flange Head Bolt M6x11
Poly V~Bell4-272
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leaving the factory. It is warranted to
he free of defects from workmanshio and materials for the oeriod ofONEYEAR from the date of
.mglnal purchase. Should my troubk develop during lhs.;nc-yr.ar penod. retum the COMPl LTt
tool. tretght preprd. to one 01 Makira'r l.actoiy or I\uthmircd Scrvrce Ccntrrr If tnrpectmn shows
the truuhlr h zaurrd hy dclr~ttveuorkmanrhip or matcnal. Vakita will repair tor at our option.
replace) uithout rhrrgc
Thir Wiliranty doer nul upply uhere
0 repair- have been made 01 aitrmmcd hy othm
repars arc rcqulrrd kauw of normal wa and tear
The tool has been ahured. mirured or improperly marntmrd.
~lt~rationi haw heen made to thr tool
IN SO EVt.NT SHALL MAKITA HI LIABIL F'OK i\N\ INDIKt('T. IN('IDt\TAL OK ('a\-
StQUIXTIALUAMAGtSfROM TIIISALt OR (1st OI'TIII. PRODICT TlllS DlSCLAlUtR
APPLIES BOTHDURING AND ATTIR THF TIRM 01: THIS WARRAYTY.
MAKITA DISCLAIMS LIABILITY tOK ANY I\II'LIkD WAKKANTlkS, INCIUDINL IMPLltD
AFTIR THL OYL-YEAR TLRMOI
THIS WAKRASTY
This Warranty gwrs you $pcrific legal nghtr. and )ou ma) also haw other nght?which vary from
state to state Some state, do nut allou the C'LCIUIIU~ or limitation of incidental or zunrequentral
damages. so the above lmitatmn "I CXFIUIIO~ may not apply to you
Some (tales do not allow
limitation on how lone an implied uairant) lasls, TU the above limrtation may not apply tu you
WARRANTIFS 01: "LILRCHANTABILITY" AND "IITNISS IOR I\ spI.citic PCRPOSL."
Makita Corporation
3-11 -8, Sumiyoshi-cho,
Anjo, Aichi
446 Japan
883986 - 063 PRINTED IN JAPAN
1994
- 10 - N