Makita 906H User Manual

Die Grinder

1/4”
MODEL 906H

INSTRUCTION MANUAL

WARNING:

For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.

www.makitatools.com

003485

SPECIFICATIONS

Model 906H

Collet size 1/4”

No load speed (RPM) 30,000/min.

Overall length 355 mm (14”)

Net weight 1.9 kg (4.2 lbs)

• Manufacturer reserves the right to change specifications without notice.

• Specifications may differ from country to country.

GENERAL SAFETY RULES

USA001-2

(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 A re a

1.

Keep your work area clean and well lit.

Cluttered benches and dark areas invite acci­dents.

2.

Do not operate power tools in explosive
atmospheres, such as in the presence of
flammable liquids, gases, or dust. Powe r

tools create sparks which may ignite the dust
or fumes.

3.

Keep bystanders, children, and visitors
away while operating a power tool. Distrac-

tions can cause you to lose control.

Electrical Safety

4.

Grounded tools must be plugged into an
outlet properly installed and grounded in
accordance with all codes and ordi­nances. Never remove the grounding
prong or modify the plug in any way. Do
not use any adaptor plugs. Check with a
qualified electrician if you are in doubt as
to whether the outlet is properly
grounded. If the tools should electrically mal-

function or break down, grounding provides a
low resistance path to carry electricity away
from the user.

2

5.

Avoid body contact with grounded sur­faces 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 cloth­ing 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 ser­viced before using. Many accidents are

caused by poorly maintained tools.

22.

Use only accessories that are recom­mended by the manufacturer for your
model. Accessories that may be suitable for

one tool, may become hazardous when used
on another tool.

3

24.

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.

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: Use only three-wire extension cords that have three­prong grounding-type plugs and three-pole receptacles that accept the tool's plug. Make
sure your extension cord is in good condition. Replace or repair damaged or worn cord
immediately. 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 number, the heavier the cord.

Table 1: Minimum gage for cord

Ampere Rating

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

Volts Total length of cord in feet

120 V 25 ft. 50 ft. 100 ft. 150 ft.

GROUNDING INSTRUCTIONS

This tool should be grounded while in use to protect the operator from electric shock. The
tool is equipped with a three-conductor cord and three-prong grounding type plug to fit the
proper grounding type receptacle. The green (or green and yellow) conductor in the cord is
the grounding wire. Never connect the green (or green and yellow) wire to a live terminal.
Your unit is for use on 120 volts and has a plug that looks like Fig. “A”.

4

An adapter Fig. “B” and “C” is available for connecting Fig. “A” type plugs to two-prong
receptacles. The green-colored rigid ear, lug, etc., extending from the adapter must be con­nected to a permanent ground, such as a properly grounded outlet box.

Adapter

Grounding Means

Grounding

Blade

Cover of Grounded

Outlet Box

Fig. A Fig. B Fig. C

SPECIFIC SAFETY RULES

USB006-2

DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to grinder safety rules. If
you use this tool unsafely or incorrectly, you can suffer serious
personal injury.

1.

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.

2.

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.

3.

Always use safety glasses or goggles.
Ordinary eye or sun glasses are NOT
safety glasses.

4.

Check the wheel carefully for cracks or
damage before operation. Replace

cracked or damaged wheel immediately.
Run the tool at no load for about a minute,
holding tool away from others. If wheel is
flawed, it will likely separate during this
test.

5.

Hold the tool firmly.

6.

Keep hands away from rotating parts.

7.

Make sure the wheel is not contacting the
workpiece before the switch is turned on.

8.

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
wheel.

5

9.

Watch out for flying sparks. Hold the tool
so that sparks fly away from you and other
persons or flammable materials.

10.

Do not leave the tool running. Operate the
tool only when hand-held.

11.

Do not touch the workpiece immediately
after operation; it may be extremely hot
and could burn your skin.

12.

Always be sure you have a firm footing.
Be sure no one is below when using the
tool in high locations.

13.

Do not use water or grinding lubricant.

14.

Do not use this tool as cutter.

15.

ALWAYS wear proper apparel including
long sleeve shirts, leather gloves and
shop aprons to protect skin from contact
with hot grindings.

16.

Use of this tool to grind or sand some
products, paints and wood could expose
user to dust containing hazardous sub­stances. Use appropriate respiratory pro­tection.

SAVE THESE INSTRUCTIONS

WARNING:

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

6

FUNCTIONAL
DESCRIPTION

1. Switch lever

1

CAUTION:

• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.

003487

Switch action

CAUTION:

• Before plugging in the tool, always check to see that the
tool is switched off.

• 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, move the switch lever to the “ON” position.
To stop the tool, move the switch lever to the “OFF” position.

ASSEMBLY

1

1. Wrench 17

2. Wrench 10

3. Collet nut

10 mm (3/8”) Max.

003492

2

3

CAUTION:

• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.

Installing or removing wheel point

Loosen the collet nut and insert the wheel point into the collet
nut. Use the smaller wrench to hold the spindle and the
larger one to tighten the collet nut securely.

003494

The wheel point should not be mounted more than 10 mm (3/
8”) from the collet nut. Exceeding this distance could cause
vibration or a broken shaft.
To remove the wheel point, follow the installation procedure
in reverse.

CAUTION:

• A 1/4” collet cone is provided as standard equipment.
Use an optional collet cone 1/8” to install a 1/8” shank
wheel point.

7

OPERATION

1

1. Dressing stone

003496

Turn the tool on without the wheel point making any contact
with the workpiece and wait until the wheel point attains full
speed. Then apply the wheel point to the workpiece gently.
To obtain a good finish, move the tool in the leftward direction
slowly.

CAUTION:

• Apply light pressure on the tool. Excessive pressure on
the tool will only cause a poor finish and overloading of
the motor.

003498

Dressing wheel point

When the wheel point becomes “loaded” with various bits
and particles, you should dress the wheel point with the
dressing stone.

MAINTENANCE

1

1. Limit mark

8

CAUTION:

• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.

001145

Replacing carbon brushes

Remove and check the carbon brushes regularly. Replace
when they wear down to the limit mark. 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.

1. Brush holder cap

2. Screwdriver

003489

Use a screwdriver to remove the brush holder caps. Take out
the worn carbon brushes, insert the new ones and secure

1

the brush holder caps.

To maintain product SAFETY and RELIABILITY, repairs, any

2

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.

• Wheel points

• Collet cone (1/4", 1/8")

• Wrench 10

• Wrench 17

• Dressing stone

9

Memo

10

Memo

11

Memo

12

Cut

Makita U.S.A., Inc.

14930 Northam Street
La Mirada, CA 90638-5753

Fold

First-Class

Postage

Required

Post Office will

not deliver

without proper

postage.

13

MAIL THIS PORTION

Your answers to the following questions are appreciated.

1. This product was purchased from:

Home Center

Hardware/Lumber Store

Tool Distributor

Industrial Supply

Construction Supply

2. Use of the product is intended for:

Construction Trade

Industrial Maintenance

Home Maintenance

Hobby

Other ( )

5. Any comments:

DATE PURCHASED MODEL NO.

MONTH DAY YEAR

INTL. LAST NAME / COMPANY NAME

Other ( )

3. How did you learn about this product:

4. Most favored points are:

SERIAL NO.

Magazine

From Dealer

Newspaper

Store Display

Catalog

Design

Features

Size

Price

Makita Brand

Radio

Exhibition

From Friend

Previous Usage

Other ( )

Repair Service

Durability

Powe r

Other ( )

STATUS

Married

Single

SEX

MF

STREET ADRESS

CITY

AREA

S TATE

AGE:

BE SURE TO COMPLETE THE CUSTOMER’S PORTION OF THIS FORM AND RETAIN FOR YOUR RECORDS.

Paste Paste Paste Paste Paste Paste

14

Please return this portion by facsimile or mail.

Facsimile No: [phone]

ZIP CODE PHONE

Under 19 20-29 30-39 40-49 50-60 Over 60

CODE

Paste Paste Paste Paste Paste Paste Paste Paste

Paste Paste Paste Paste Paste Paste

FACTORY SERVICE CENTERS

1-800-4-MAKITA

RETAIN THIS PORTION FOR YOUR RECORDS

ARIZONA

3707 E. Broadway Rd., Ste. 6
Phoenix, AZ 85040
[phone]

CALIFORNIA

41850 Christy St.
Fremont, CA 94538-5107
[phone]

14930 Northam St.
La Mirada, CA 90638-5753
[phone]

1970 Fulton Avenue
Sacramento, CA 95825
[phone]

7674 Clairemont Mesa Blvd.
San Diego, CA 92111
[phone]

16735 Saticoy St., Ste. 105
Van Nuys, CA 91406
[phone]

COLORADO

11839 E. 51st Ave.
Denver, CO 80239-2709
[phone]

FLORIDA

750 East Sample Road
Pompano Beach, FL 33064
[phone]

GEORGIA

4680 River Green Parkway NW
Duluth, GA 30096
[phone]

ILLINOIS

1450 Feehanville Dr.
Mt. Prospect, IL 60056-6011
[phone]

MARYLAND

7397 Washington Boulevard,
Suite 104 Elkridge, MD 21075
[phone]

MASSACHUSETTS

232 Providence Hwy.
Westwood, MA 02090
[phone]

MINNESOTA

6427 Penn Ave. South
Richfield, MN 55423
[phone]

MISSOURI

9876 Watson Road
St. Louis, MO 63126-2221
[phone]

NEBRASKA

4129 S. 84th St.
Omaha, NE 68127
[phone]

NEVADA

3375 S. Decatur Blvd.
Suites. 22 - 24
Las Vegas, NV 89102
[phone]

NEW JERSEY

251 Herrod Blvd.
Dayton, NJ 08810-1539
[phone]

NEW YORK

4917 Genessee Street
Cheektowaga, NY 14225
[phone]

OREGON

828 19th Avenue, N.W.
Portland, OR 97209
[phone]

PENNSYLVANIA

1704 Babcock Blvd.
Pittsburgh, PA 15209
[phone]

PUERTO RICO

200 Guayama St.
Hato Rey, PR 00917
[phone]

TENNESSEE

1120 Elm Hill P.
Suile 170 Nashville, TN 372
[phone]

TEXAS

12801 Stemmons Fwy Ste. 809
Farmers Branch, TX 75234
[phone]

12701 Directors Dr.
Stafford, TX 77477-3701
[phone]

3453 IH-35 North, Ste. 101
San Antonio, TX 78219
[phone]

WISCONSIN

Lincoln Plaza Shopping Ctr.
2245 S. 108th St. West Allis, WI
53227
[phone]

CUSTOMER’S RECORD

When you need service: Send
complete tool (prepaid) to one
of the Makita Factory Service
Centers listed, or to an Authorized
Makita Service Center. Be sure
to attach a letter to the outside of
the carton detailing the problem
with your tool.

Date Purchased

Dealer’s Name & Address

Model No.

Serial No.

15

WARNING

Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known to the State of California
to cause cancer, birth defects or other reproductive harm. Some examples
of these chemicals are:

• lead from lead-based paints,

• crystalline silica from bricks and cement and other masonry products, and

• arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this
type of work. To reduce your exposure to these chemicals: work in a well
ventilated area, and work with approved safety equipment, such as those
dust masks that are specially designed to filter out microscopic particles.

MAKITA LIMITED ONE YEAR WARRANTY

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 Centers. 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:

• repairs have been made or attempted by others:

• repairs are required because of normal wear and tear:

• the tool has been abused, misused or improperly maintained:

• alterations have been made to the tool.

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 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 legal rights, and you may also have other rights which vary from state to state.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. Some states do not allow limitation on how long an implied
warranty lasts, so the above limitation may not apply to you.

883498C066

Makita Corporation

3-11-8, Sumiyoshi-cho,

Anjo, Aichi 446-8502 Japan