Makita HR2455, HR2445 User Manual

Rotary Hammer

MODEL HR2445
MODEL HR2455

DOUBLE
INSULATION

INSTRUCTION MANUAL

WARNING:

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

www.makitatools.com

003862

SPECIFICATIONS

Model HR2445 HR2455

Concrete 25 mm (1”)

Capacities

No load speed (RPM) 0 - 1,100/min.

Blows per minute 0 - 4,500

Overall length 416 mm (16-3/8”) 424 mm (16-3/4”)

Net weight 2.7 kg ( 6.0 lbs) 2.8 kg ( 6.2 lbs)

• Manufacturer reserves the right to change specifications without notice.

• Specifications may differ from country to country.

Core bit 54 mm (2-1/8 “)

Steel 13 mm (1/2”)

Wood 32 mm (1-1/4”)

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 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.

2

3. Keep bystanders, children, and visitors

away while operating a power tool. Distrac-

tions 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 elec­trician 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.

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.

3

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.

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 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.

SPECIFIC SAFETY RULES USB010-2

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

1. Hold tools 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.

2. Wear ear protectors when using the tool
for extended periods. Prolonged exposure
to high intensity noise can cause hearing
loss.

4

3. Wear a hard hat (safety helmet), safety
glasses and/or face shield. Ordinary eye
or sun glasses are NOT safety glasses. It
is also highly recommended that you wear
a dust mask and thickly padded gloves.

4. Be sure the bit is secured in place before
operation.

5. Under normal operation, the tool is
designed to produce vibration. The
screws can come loose easily, causing a
breakdown or accident. Check tightness
of screws carefully before operation.

6. In cold weather or when the tool has not
been used for a long time, let the tool
warm up for a while by operating it under
no load. This will loosen up the lubrica­tion. Without proper warm-up, hammering
operation is difficult.

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

8. Hold the tool firmly with both hands.

9. Keep hands away from moving parts.

10. Do not leave the tool running. Operate the

tool only when hand-held.

11. Do not point the tool at any one in the area
when operating. The bit could fly out and
injure someone seriously.

12. Do not touch the bit or parts close to the
bit immediately after operation; they may
be extremely hot and could burn your
skin.

13. Some material contains chemicals which
may be toxic. Take caution to prevent dust
inhalation and skin contact. Follow mate­rial supplier safety data.

SAVE THESE INSTRUCTIONS

WARNING:

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

SYMBOLS USD202-2

The followings show the symbols used for tool.

V .......................volts

A ....................... amperes

Hz .....................hertz

................ alternating current

....................no load speed

n

˚

....................Class II Construction

.../min................revolutions or reciprocation per

minute

................number of blow

5

FUNCTIONAL
DESCRIPTION

003863

CAUTION:

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

Switch action

2

1. Lock button

2. Switch trigger

A

2

B

1. Switch trigger

2. Reversing switch lever

1

1

CAUTION:

• Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
position when released.

To start the tool, simply pull the switch trigger. Tool speed is
increased by increasing pressure on 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.

003864

Reversing switch action

CAUTION:

• Always check the direction of rotation before operation.

• Use the reversing switch only after the tool comes to a

complete stop. Changing the direction of rotation before
the tool stops may damage the tool.

• When you operate the tool in counterclockwise rotation,
the switch trigger is pulled only halfway and the tool runs
at half speed. For counterclockwise rotation, you cannot
push in the lock button.

This tool has a reversing switch to change the direction of
rotation. Move the reversing switch lever to the position
(A side) for clockwise rotation or to the position (B side)
for counterclockwise rotation.

6

1

1. Action mode changing knob

1

2

Selecting action mode

001294

For Model HR2445

This tool employs an action mode changing knob. Select one
of the two modes suitable for your work needs by using this
knob. For rotation only, turn the knob so that the arrow on the
knob points toward the symbol on the tool body. For rota­tion with hammering, turn the knob so that the arrow on the
knob points toward the symbol on the tool body.

CAUTION:

• Always set the knob fully to your desired mode symbol. If
you operate the tool with the knob positioned half-way
between the mode symbols, the tool may be damaged.

For Model HR2455

CAUTION:

• Do not rotate the action mode changing knob when the
tool is running under load. The tool will be damaged.

• To avoid rapid wear on the mode change mechanism, be
sure that the action mode changing knob is always
positively located in one of the three action mode
positions.

003573

Rotation with hammering

For drilling in concrete, masonry, etc., depress the lock but­ton and rotate the action mode changing knob to the
symbol. Use a tungsten-carbide tipped bit.

3

1. Rotation with hammering

2. Lock button

3. Action mode changing knob

1

1. Hammering only

003574

Hammering only

For chipping, scaling or demolition operations, depress the
lock button and rotate the action mode changing knob to the

symbol. Use a bull point, cold chisel, scaling chisel, etc.

7

1

1. Rotation only

003575

Rotation only

For drilling in wood, metal or plastic materials, depress the
lock button and rotate the action mode changing knob to the

symbol. Use a twist drill bit or wood bit.

Torque l imit er

The torque limiter will actuate when a certain torque level is
reached. The motor will disengage from the output shaft.
When this happens, the bit will stop turning.

CAUTION:

• As soon as the torque limiter actuates, switch off the tool
immediately. This will help prevent premature wear of the
tool.

• Hole saws cannot be used with this tool. They tend to
pinch or catch easily in the hole. This will cause the
torque limiter to actuate too frequently.

ASSEMBLY

1

2

36

1. Grip base

2. Side grip

3. Loosen

4. Teeth

5. Protrusion

6. Tighten

8

CAUTION:

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

001295

5

4

Side handle (auxiliary handle)

Always use the side grip to ensure operating safety. Install
the side grip so that the teeth on the grip fit in between the
protrusions on the tool barrel. Then tighten the grip by turn­ing clockwise at the desired position. It may be swung 360°
so as to be secured at any position.

1

1. Bit shank

2. Bit grease

1

1. Bit

2. Chuck cover

Bit grease

Coat the bit shank head beforehand with a small amount of
bit grease (about 0.5 - 1 g).
This chuck lubrication assures smooth action and longer ser­vice life.

001296

Installing or removing the bit

Clean the bit shank and apply bit grease before installing the
bit.

2

001297

Insert the bit into the tool. Turn the bit and push it in until it
engages.
After installing, always make sure that the bit is securely held
in place by trying to pull it out.

2

001298

To remove the bit, pull the chuck cover down all the way and
pull the bit out.

1

1. Bit

2. Chuck cover

2

9

12

1. Lock button

2. Action mode changing knob

1

1. Depth gauge

Bit angle (when chipping, scaling or demolishing)

003576

For Model HR2455 only

The bit can be secured at the desired angle. To change the
bit angle, depress the lock button and rotate the action mode
changing knob to the O symbol. Turn the bit to the desired
angle.

003577

Depress the lock button and rotate the action mode changing
knob to the symbol. Then make sure that the bit is
securely held in place by turning it slightly.

003865

Depth gauge

The depth gauge is convenient for drilling holes of uniform
depth. Loosen the side grip and insert the depth gauge into
the hole in the side grip. Adjust the depth gauge to the
desired depth and tighten the side grip.

NOTE:

• The depth gauge cannot be used at the position where
the depth gauge strikes against the gear housing.

1. Dust cup

10

001300

1

Dust cup

Use the dust cup to prevent dust from falling over the tool
and on yourself when performing overhead drilling opera­tions. Attach the dust cup to the bit as shown in the figure.
The size of bits which the dust cup can be attached to is as
follows.

003578

Dust cup 5
Dust cup 9

Bit diameter

6 mm (1/4”) - 14.5 mm (9/16”)

12 mm (15/32”) - 16 mm (5/8”)

OPERATION

003866

Hammer drilling operation

Set the action mode changing knob to the symbol.

Position the bit at the desired location for the hole, then pull
the switch trigger.

Do not force the tool. Light pressure gives best results. Keep
the tool in position and prevent it from slipping away from the
hole.
Do not apply more pressure when the hole becomes clogged
with chips or particles. Instead, run the tool at an idle, then
remove the bit partially from the hole. By repeating this sev­eral times, the hole will be cleaned out and normal drilling
may be resumed.

CAUTION:

• There is tremendous and sudden twisting force exerted
on the tool/bit at the time of hole break-through, when
the hole becomes clogged with chips and particles, or
when striking reinforcing rods embedded in the concrete.
Always use the side grip (auxiliary handle) and firmly
hold the tool by both side grip and switch handle during
operations. Failure to do so may result in the loss of
control of the tool and potentially severe injury.

001302

Blow-out bulb

Use the blow-out bulb to clean out the hole.

1. Blow-out bulb

1

Chipping/Scaling/Demolition

003867

For Model HR2455 only

Set the action mode changing knob to the symbol.

Hold the tool firmly with both hands. Turn the tool on and
apply slight pressure on the tool so that the tool will not
bounce around, uncontrolled. Pressing very hard on the tool
will not increase the efficiency.

11

1

1. Drill chuck assembly

001303

Drilling in wood or metal

Use the optional drill chuck assembly. When installing it, refer
to “Installing or removing drill bit” described on the previous
page.

Set the action mode changing knob to the symbol. You
can drill up to 13 mm(1/2”) diameter in metal and up to
32 mm(1-1/4”) diameter in wood.

CAUTION:

• Never use “rotation with hammering” when the drill
chuck assembly is installed on the tool. The drill chuck
assembly may be damaged.
Also, the drill chuck will come off when reversing the tool.

• Pressing excessively on the tool will not speed up the
drilling. In fact, this excessive pressure will only serve to
damage the tip of your bit, decrease the tool
performance and shorten the service life of the tool.

• There is a tremendous twisting force exerted on the tool/
bit at the time of hole breakthrough. Hold the tool firmly
and exert care when the bit begins to break through the
workpiece.

• A stuck bit can be removed simply by setting the
reversing switch to reverse rotation in order to back out.
However, the tool may back out abruptly if you do not
hold it firmly.

• Always secure small workpieces in a vise or similar hold­down device.

• When performing diamond core drilling operations,
always set the change lever to the position to use
“rotation only” action. If performing diamond core drilling
operations using “rotation with hammering” action, the
diamond core bit may be damaged.

MAINTENANCE

12

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 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.

• SDS Plus Carbide-tipped bits

• Core bit

• Bull point (For HR2455 only)

• Cold chisel (For HR2455 only)

• Scaling chisel (For HR2455 only)

• Grooving chisel (For HR2455 only)

• Scraper (For HR2455 only)

• Bit grease

• Side grip

• Depth gauge

• Blow-out bulb

• Dust cup

• Dust extractor attachment

• Drill chuck assembly

• Chuck adapter

• Keyless drill chuck

• Drill chuck S13

• Chuck key S13

• Safety goggle

• Plastic carrying case

13

Memo

14

Memo

15

Memo

16

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.

17

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

18

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

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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.

19

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.

884479-974

Makita Corporation

Anjo, Aichi, Japan

Made in China

Nan Zi Road, Kunshan Export Processing Zone Jiangsu, P.R. China