Makita 4112H User manual

INSTRUCTION MANUAL
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
Angle Cutter
MODEL 4112H
004012
DOUBLE
INSULATION

2
SPECIFICATIONS
• Manufacturer reserves the right to change specifications without notice.
• Specifications may differ from country to country.
GENERAL SAFETY RULES USA002-2
(For All Tools)
WARNING:
Read and understand all instructions. Failure to follow all
instructions listed below, may result in electric shock, fire and/or
serious personal injury.
SAVE THESE INSTRUCTIONS
Work Area
1. Keep your work area clean and well lit.
Cluttered benches and dark areas invite acci-
dents.
2. Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases, or dust. Power
tools create sparks which may ignite the dust
or fumes.
3. Keep bystanders, children, and visitors
away while operating a power tool. Dis-
tractions can cause you to lose control.
Electrical Safety
4. Double insulated tools are equipped with
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, reverse the plug. If it
still does not fit, contact a qualified elec-
trician to install a polarized outlet. Do not
change the plug in any way. Double insula-
tion eliminates the need for the three wire
grounded power cord and grounded power
supply system.
Model 4112H
Wheel diameter 305 mm (12”)
Max cutting capcity 100 mm (4”)
No load speed (RPM) 5000/min
Overall length 648 mm (25-1/2”)
Net weight 10.2 kg (22.2 lbs)

3
5. Avoid body contact with grounded sur-
faces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of
electric shock if your body is grounded.
6. Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
7. Do not abuse the cord. Never use the cord
to carry the tools or pull the plug from an
outlet. Keep cord away from heat, oil,
sharp edges or moving parts. Replace
damaged cords immediately. Damaged
cords increase the risk of electric shock.
8. When operating a power tool outside, use
an outdoor extension cord marked “W-A”
or “W”. These cords are rated for outdoor
use and reduce the risk of electric shock.
Personal Safety
9. Stay alert, watch what you are doing and
use common sense when operating a
power tool. Do not use tool while tired or
under the influence of drugs, alcohol, or
medication. A moment of inattention while
operating power tools may result in serious
personal injury.
10. Dress properly. Do not wear loose cloth-
ing or jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from
moving parts. Loose clothes, jewelry, or
long hair can be caught in moving parts.
11. Avoid accidental starting. Be sure switch
is off before plugging in. Carrying tools with
your finger on the switch or plugging in tools
that have the switch on invites accidents.
12. Remove adjusting keys or wrenches
before turning the tool on. A wrench or a
key that is left attached to a rotating part of
the tool may result in personal injury.
13. Do not overreach. Keep proper footing
and balance at all times. Proper footing and
balance enables better control of the tool in
unexpected situations.
14. Use safety equipment. Always wear eye
protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must
be used for appropriate conditions. Ordinary
eye or sun glasses are NOT eye protection.
Tool Use and Care
15. Use clamps or other practical way to
secure and support the workpiece to a
stable platform. Holding the work by hand or
against your body is unstable and may lead
to loss of control.
16. Do not force tool. Use the correct tool for
your application. The correct tool will do the
job better and safer at the rate for which it is
designed.
17. Do not use tool if switch does not turn it
on or off. Any tool that cannot be controlled
with the switch is dangerous and must be
repaired.
18. Disconnect the plug from the power
source before making any adjustments,
changing accessories, or storing the tool.
Such preventive safety measures reduce the
risk of starting the tool accidentally.
19. Store idle tools out of reach of children
and other untrained persons. Tools are
dangerous in the hands of untrained users.
20. Maintain tools with care. Keep cutting
tools sharp and clean. Properly maintained
tools with sharp cutting edges are less likely
to bind and are easier to control.
21. Check for misalignment or binding of
moving parts, breakage of parts, and any
other condition that may affect the tools
operation. If damaged, have the tool ser-
viced before using. Many accidents are
caused by poorly maintained tools.
22. Use only accessories that are recom-
mended by the manufacturer for your
model. Accessories that may be suitable for
one tool, may become hazardous when used
on another tool.

4
SERVICE
23. Tool service must be performed only by
qualified repair personnel. Service or main-
tenance performed by unqualified personnel
could result in a risk of injury.
24. When servicing a tool, use only identical
replacement parts. Follow instructions in
the Maintenance section of this manual.
Use of unauthorized parts or failure to follow
Maintenance instructions may create a risk of
electric shock or injury.
USE PROPER EXTENSION CORD: 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 in line voltage resulting in loss of
power and overheating. Table 1 shows the correct size to use depending on cord length and
nameplate ampere rating. If in doubt, use the next heavier gage. The smaller the gage num-
ber, the heavier the cord.
SPECIFIC SAFETY RULES USB080-1
DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to cutter safety rules. If
you use this tool unsafely or incorrectly, you can suffer serious
personal injury.
1. Always use proper guard with wheel. A
guard protects operator from broken wheel
fragments.
2. Accessories must be rated for at least the
speed recommended on the tool warning
label. Wheels and other accessories running
over rated speed can fly apart and cause
injury.
3. Hold tool by insulated gripping surfaces
when performing an operation where the
cutting tool may contact hidden wiring or
its own cord. Contact with a “live”wire will
make exposed metal parts of the tool “live”
and shock the operator.
4. Always use safety glasses or goggles.
Ordinary eye or sun glasses are NOT
safety glasses.
5. Check the wheel carefully for cracks or
damage before operation. Replace
cracked or damaged wheel immediately.
Run the tool (with guard) at no load for
about a minute, holding tool away from
others. If wheel is flawed, it will likely sep-
arate during this test.
Table 1: Minimum gage for cord
Ampere Rating Volts Total length of cord in feet
120 V 25 ft. 50 ft. 100 ft. 150 ft.
More Than Not More Than AWG
0 6 18 16 16 14
6 10 18161412
10 12 16 16 14 12
12 16 14 12 Not Recommended

5
6. Use only flanges specified for this tool.
7. Be careful not to damage the spindle or
the flange (especially the installing sur-
face). Damage to these parts could result
in wheel breakage.
8. NEVER use tool with wood cutting blades
or other sawblades. Such blades when
used on a grinder frequently kick and
cause loss of control leading to personal
injury.
9. Hold the tool firmly.
10. Keep hands away from rotating parts.
11. Make sure cord is clear of wheel. Do not
wrap cord around your arm or wrist. If
control of tool is lost, cord may become
wrapped around you and cause personal
injury.
12. Make sure the wheel is not contacting the
workpiece before the switch is turned on.
13. Before using the tool on an actual work-
piece, let it run for a while. Watch for
vibration or wobbling that could indicate
poor installation or a poorly balanced
wheel.
14. Watch out for flying sparks. Hold the tool
so that sparks fly away from you and
other persons or flammable materials.
15. Do not leave the tool running. Operate the
tool only when hand-held.
16. Do not touch the workpiece immediately
after operation; it may be extremely hot
and could burn your skin.
17. ALWAYS wear proper apparel including
long sleeve shirts, leather gloves and
shop aprons to protect skin from contact
with hot cuttings.
18. Use of this tool to cut some products
could expose user to dust containing haz-
ardous substances. Use appropriate res-
piratory protection.
19. The tool must be used only for dry cut-
ting. DO NOT use water.
SAVE THESE INSTRUCTIONS
WARNING:
MISUSE or failure to follow the safety rules stated in this
instruction manual may cause serious personal injury.

6
SYMBOLS USD291-2
The followings show the symbols used for tool.
V....................... volts
A....................... amperes
.............. alternating or direct current
....................no load speed
....................Class II Construction
.../min................revolutions or reciprocation per
minute
n˚

7
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
Loosen the wing bolt on the depth guide and move the base
up or down. At the desired depth of cut, secure the base by
tightening the wing bolt.
Only case you adjust the cutting depth to the maximum one,
always be sure to do the adjustment after adjustment of the
wheel guard.
Securing wheel guard
CAUTION:
•The wheel guard must be adjusted on the tool so that
the closed side of the guard always points toward the
operator.
The wheel guard can be adjusted about 80 degrees, after
you loosen the clamping nut. Adjust to the desired angle,
then secure the clamping nut.
Switch action
CAUTION:
•Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
position when released.
•Switch can be locked in “ON”position for ease of
operator comfort during extended use. Apply caution
when locking tool in “ON”position and maintain firm
grasp on tool.
To start the tool, simply pull the switch trigger.( A direction )
Release the switch trigger to stop.
For continuous operation, pull the switch trigger ( A direction
) and then push in the lock lever.( B direction )
To stop the tool from the locked position, pull the switch trig-
ger ( A direction ) fully, then release it.
1. Wing bolt
2. Base
3. Cutting depth
1
3
2
004377
1. Clamping nut
2. Wheel guard
1
2
004014
1. Switch trigger
2. Lock lever
1
2
A
B
004015

8
ASSEMBLY CAUTION:
•Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Installing or removing the wheel
To remove the wheel, depress the shaft lock to hold the shaft
stationary, then loosen the hex bolt clockwise with the socket
wrench.
To install a wheel, place flange with its partly elevated side
facing the tool, and then place ring before installing a wheel
onto the spindle (shaft) and another flange with partly ele-
vated side facing outward.
Be sure to fully tighten the hex bolt counterclockwise after
mounting the new wheel, or operation will be dangerous.
CAUTION:
•Use only the Makita wrench to install or remove the
wheel.
Connecting to vacuum cleaner
When you wish to perform cleaner operation, connect a vac-
uum cleaner to your tool. Connect a hose of vacuum cleaner
to the dust nozzle via an elbow joint (accessory).
1. Shaft lock
2. Socket wrench
1. Flange
2. Ring
3. Wheel
4. Flange
5. Hex bolt
12
004016
54
3
2
1
004378
1. Dust nozzle
2. Elbow joint
3. Hose
2
1
3
004379

9
OPERATION CAUTION:
Be sure to pull the tool when cutting a workpiece.
•Use this tool for straight line cutting only. Cutting curves
can cause stress cracks or fragmentation of the diamond
wheel and abrasive cut-off wheel resulting in possible
injury to persons in the vicinity.
•After operation, always switch off the tool and wait until
the wheel has come to a complete stop before putting
the tool down.
•When cutting concrete blocks, tiles or masonry
materials, do not make a cut in depth more than 60 mm
(2-3/8”). When you need to cut a workpiece over 60 mm
(2-3/8”) up to 100 mm (4”), make more than two passes
of cuts. The depth of the most efficient cut is about
40 mm (1-9/16”).
Hold the tool firmly with both hands. First keep the wheel
without making any contact with a workpiece to be cut. Then
turn the tool on and wait until the wheel attains full speed.
The cut is made by pulling the tool toward you (not by push-
ing away from you). Align the notch on the base with your
cutting line when performing a cut.
Switch off the tool on the position posed when finishing a cut.
Raise the tool after the wheel comes to a complete stop.
MAINTENANCE CAUTION:
•Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
Dressing diamond wheel
If the cutting action of the diamond wheel begins to diminish,
use an old discarded coarse grit bench grinder wheel or con-
crete block to dress the diamond wheel. To do this, tightly
secure the bench grinder wheel or concrete block and cut in
it.
1. Notch
2. Cutting line
1
2
004380

10
Replacing carbon brushes
When the resin insulating tip inside the carbon brush is
exposed to contact the commutator, it will automatically shut
off the motor. When this occurs, both carbon brushes should
be replaced. Keep the carbon brushes clean and free to slip
in the holders. Both carbon brushes should be replaced at
the same time. Use only identical carbon brushes.
Pick up an end of the dust cover slightly with hands so that
brush hoder cap appears.
Use a screwdriver to remove the brush holder caps. Take out
the worn carbon brushes, insert the new ones and secure
the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs, any
other maintenance or adjustment should be performed by
Makita Authorized or Factory Service Centers, always using
Makita replacement parts.
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. Only use accessory or
attachment for its stated purpose.
If you need any assistance for more details regarding these
accessories, ask your local Makita service center.
•Abrasive cut-off wheels
•Socket wrench 17
•Safety goggle
•Ring 20
•Elbow joint
1. Commutator
2. Insulating tip
3. Carbon brush
1
2
3
001146
1. Dust cover
2. Screwdriver
3. Brush holder cap
1
2
3
004020

Memo
11

Memo
12

13
Fold
Cut
Stamp
Timbre
Makita Canada Inc.
1950 Forbes Street,
Whitby, Ontario
L1N 7B7

14
Your answers to the following questions are appreciated.
Date Purchased Model No.
Serial No.
Initial Last Name
Street Address
City Province
AGE:
Male Female MarriedSingle
Month Day Year 20
Under 19 20-29 30-39 40-49 Over 50
Paste Paste Paste Paste Paste Paste Paste Paste
Paste Paste Paste Paste Paste Paste
Paste Paste Paste Paste Paste Paste
1. This product was purchased from?
Industrial Supply
Other ( )Tool Distributor
Hardware/lumber Store
2. Use of the product is intended for?
5. Any comments?
Home maintenance
Other ( )Industrial maintenance
Construction trade
3. How did you first learn of Makita Power Tools?
Catalog
Other ( )From dealer
Magazine/Newspaper
Store display
4. Most favored points are?
Makita Brand
PowerFeatures
Design
Other ( )Size
Price
Occupation:
Dealer's Name & Address:
Postal Code
Certificate of Warranty
Mail to Makita

15
Factory Service Centres
For the authorized service centre nearest you please refer to the local yellow pages directory under “tools”or con-
tact our customer service department (Tel) 1-800-263-3734
When you need service...
•Explain the problem in a letter
•Enclose the letter with the tool
•Package carefully and send prepaid
to the nearest Makita factory or
authorized service centre
CUSTOMER RECORD
DATE
PURCHASED:
DEALER’S NAME
& ADDRESS:
MODEL NO.:
SERIAL NO.:
Head Office: 1950 Forbes St., Whitby, Ontario, L1N 7B7
(905) 571 - 2200 1-800-263-3734
Regional Office: 11771 Hammersmith Way, Richmond
(604) 272 - 3104 1-800-663-0909B.C. V7A 5H6
Regional Office: 6389 boul. Couture, St. Leonard, Quebec
(514) 323 - 1223 1-800-361-7049H1P 3J5(Montreal)
Dartmouth: 202 Brownlow Avenue
(902) 468 - 7064 1-888-625-4821Dartmouth, N.S., B3B 1T5
Ville St. Laurent: 1140 Rue Bégin, Ville St. Laurent, Quebec
(514) 745 - 5025 1-888-745-5025H4R 1X1(Montreal)
Les Saules: 1200 St. Jean Baptiste, Unit 106, Les Saules,
(418) 871 - 5720 1-800-663-5757Quebec, G2E 5E8(Quebec)
Nepean: 210 Colonnade Road, Unit 11, Nepean,
(613) 224 - 5022 1-888-560-2214Ontario, K2E 7M1(Ottawa)
London: 317 Adelaide St. S., Unit 117, London,
(519) 686 - 3115 1-800-571-0899Ontario, N5Z 3L3
Whitby: 1950 Forbes St., Whitby, Ontario, L1N 7B7
(905) 571 - 2200 1-800-263-3734
Mississauga: 6350 Tomken Rd., Unit 8, Mississauga,
(905) 670 - 7255 1-888-221-9811Ontario, L5T 1Y3
Calgary: #8-6115 Fourth St. S.E., Calgary
(403) 243 - 3995 1-800-267-0445Alberta, T2H 2H9
Richmond: 11771 Hammersmith Way, Richmond, B.C.,
(604) 272 - 3104 1-800-663-0909V7A 5H6
Edmonton: 11614-149 Street, Edmonton, Alberta,
(780) 455 - 6644 1-888-455-6644T5M 3R3
Coquitlam: 2131 Hartley Ave., #103
(604) 525 - 7434 1-800-266-7738Coquitlam, B.C. V3K 2Z3
Winnipeg: 1670 St. James Street, Winnipeg, Manitoba,
(204) 694 - 0402 1-800-550-5073R3H 0L3
Saskatoon: 206A-2750 Faithful Avenue Saskatoon,
(306) 931 - 0111 1-888-931-0111Saskatchewan, S7K 6M6

Warranty Policy
Every Makita tool is thoroughly inspected and tested before leaving the factory. It is warranted to be free of defects from
workmanship and materials for the period of ONE YEAR from the date of original purchase. Should any trouble develop during
this one year period, return the COMPLETE tool, freight prepaid, to one of Makita’s Factory or Authorized Service Centres.
If inspection shows the trouble is caused by defective workmanship or material, Makita will repair (or at our option, replace)
without charge.
This Warranty does not apply:
•where normal maintenance is required,
•repairs have been made or attempted by others,
•the tool has been abused, misused or improperly maintained,
•alterations have been made to the tool.
“The Makita Warranty is the only and the entire written warranty given by Makita for the Makita tools. No dealer or his agent
or employee is authorized to extend or enlarge upon this warranty by any verbal or written statement or advertisement.”
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES OF
“MERCHANTABILITY”AND FITNESS FOR A SPECIFIC PURPOSE,”AFTER THE ONE YEAR TERM OF THIS WARRANTY.
“This Warranty gives you specific rights. The provisions contained in this warranty are not intended to limit, modify, take away
from, disclaim or exclude any warranties set forth in any provincial legislation. To the extent required by law, the provisions in
any provincial or federal legislation with respect to warranties take precedence over the provisions in this warranty.”
MAKITA LIMITED ONE YEAR WARRANTY
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES FROM
THE SALE OR USE OF THE PRODUCT. THIS DISCLAIMER APPLIES BOTH DURING AND AFTER THE TERM OF THIS
WARRANTY.
Makita Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan
884493-235