Rotary Hammer
Variable speed / Reversing
25 mm (1”)
MODEL HR2450F
003571
DOUBLE
INSULATION
I N S T R U C T I O N M A N U A L
WARNING:
For your personal safety, READ and UNDERSTAND before using.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
w w w. m a k i t a t o o l s . c o m
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still does not fit, contact a qualified elec-
trician to install a polarized outlet. Do not
change the plug in any way. Double insula-
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.
tion
eliminates the need for the three wire
grounded power cord and grounded power
supply system.
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.
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.
6. Do not expose power tools to rain or wet
conditions. Water entering a power tool will
increase the risk of electric shock.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
12. Remove adjusting keys or wrenches
before turning the tool on. A wrench or a
3
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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.
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.
SERVICE
23. Tool service must be performed only by
qualified repair personnel. Service or main-
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.
Table 1: Minimum gage for cord
Volts
120 V
Total length of cord in feet
Ampere Rating
25 ft.
50 ft.
100 ft.
150 ft.
More Than
Not More Than
AWG
0
6
10
12
6
18
18
16
14
16
16
16
12
16
14
14
14
12
12
10
12
16
Not Recommended
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.
to high intensity noise can cause hearing
loss.
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.
2. Wear ear protectors when using the tool
for extended periods. Prolonged exposure
4
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4. Be sure the bit is secured in place before
8. Hold the tool firmly with both hands.
operation.
9. Keep hands away from moving parts.
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.
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.
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 lubrica-
tion. Without proper warm-up, hammering
operation is difficult.
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 mate-
rial supplier safety data.
7. Always be sure you have a firm footing.
Be sure no one is below when using the
tool in high locations.
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
....................no load speed
n
˚
A .......................amperes
....................Class II Construction
Hz .....................hertz
.../min................revolutions or reciprocation per
minute
................alternating current
................number of blow
5
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FUNCTIONAL
DESCRIPTION
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
001292
Switch action
CAUTION:
•
Before plugging in the tool, always check to see that the
switch trigger actuates properly and returns to the “OFF”
2
1
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.
1. Switch trigger
2. Lock button
003572
Lighting up the lamps
CAUTION:
•
Do not look in the light or see the source of light directly.
To turn on the lamp, pull the trigger. Release the trigger to
turn it off.
1
NOTE:
1. Lamp
•
Use a dry cloth to wipe the dirt off the lens of lamp. Be
careful not to scratch the lens of lamp, or it may lower the
illumination.
001293
Reversing switch action
CAUTION:
A
•
•
Always check the direction of rotation before operation.
1
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.
B
2
1. Switch trigger
•
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.
2. Reversing switch lever
6
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This tool has a reversing switch to change the direction of
rotation. Move the reversing switch lever to the position
position (B side)
(A side) for clockwise rotation or to the
for counterclockwise rotation.
Selecting action mode
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
1
2
For drilling in concrete, masonry, etc., depress the lock but-
ton 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
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.
1
1. Hammering 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.
1
1. Rotation only
7
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Torque limiter
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
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
001295
Side handle (auxiliary handle)
5
1
2
4
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 turn-
ing clockwise at the desired position. It may be swung 360°
so as to be secured at any position.
3
6
1. Grip base
2. Side grip
3. Loosen
4. Teeth
5. Protrusion
6. Tighten
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 ser-
vice life.
8
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001296
001297
001298
Installing or removing the bit
Clean the bit shank and apply bit grease before installing the
bit.
1
2
1. Bit shank
2. Bit grease
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.
1
2
1. Bit
2. Chuck cover
To remove the bit, pull the chuck cover down all the way and
pull the bit out.
1
2
1. Bit
2. Chuck cover
003576
Bit angle (when chipping, scaling or demolishing)
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.
1
2
1. Lock button
2. Action mode changing knob
9
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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.
001299
Depth gauge
1
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. Depth gauge
001300
Dust cup
Use the dust cup to prevent dust from falling over the tool
and on yourself when performing overhead drilling opera-
tions. 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.
1
Bit diameter
6 mm (1/4”) - 14.5 mm (9/16”)
12 mm (15/32”) - 16 mm (5/8”)
1. Dust cup
Dust cup 5
Dust cup 9
OPERATION
003579
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 sev-
eral times, the hole will be cleaned out and normal drilling
may be resumed.
10
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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
1. Blow-out bulb
003580
Chipping/Scaling/Demolition
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.
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.
1
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.
1. Drill chuck assembly
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.
11
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•
•
•
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 hold-
down device.
When perfotming diamond core drilling operations,
always set the chenge lever to the
position to use
“rotation only” action. If performing daimond core driling
operations using “rotation with hammering” action, the
daimond core bit may be damaged.
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, car-
bon brush inspection and replacement, any other mainte-
nance or adjustment should be performed by Makita
Authorized or Factory Service Centers, always using Makita
replacement parts.
12
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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
Cold chisel
Scaling chisel
Grooving chisel
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
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Memo
14
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Memo
15
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Memo
16
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First-Class
Postage
Required
Post Office will
not deliver
without proper
postage.
Makita U.S.A., Inc.
14930 Northam Street
La Mirada, CA 90638-5753
Fold
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MAIL THIS PORTION
Your answers to the following questions are appreciated.
1.This product was purchased from:
3. How did you learn about this product:
Home Center
Other (
)
Magazine
Radio
Hardware/Lumber Store
Tool Distributor
From Dealer
Newspaper
Store Display
Catalog
Exhibition
From Friend
Previous Usage
Other (
Industrial Supply
Construction Supply
)
2. Use of the product is intended for:
4. Most favored points are:
Construction Trade
Industrial Maintenance
Home Maintenance
Hobby
Design
Repair Service
Durability
Power
Features
Size
Price
Other (
)
Other (
)
Makita Brand
5. Any comments:
DATE PURCHASED
MONTH
MODEL NO.
DAY
YEAR
SERIAL NO.
STATUS
SEX
Married Single
M
F
INTL.
LAST NAME / COMPANY NAME
STREET ADRESS
CITY
AREA
CODE
STATE
ZIP CODE
PHONE
40-49
Under 19
20-29
30-39
50-60
Over 60
AGE:
BE SURE TO COMPLETE THE CUSTOMER’S PORTION OF THIS FORM AND RETAIN FOR YOUR RECORDS.
Please return this portion by facsimile or mail.
Facsimile No: (714) 522-8133
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Paste
Paste
Paste
Paste
Paste
Paste
Paste
Paste
FACTORY SERVICE CENTERS
1-800-4-MAKITA
RETAIN THIS PORTION FOR YOUR RECORDS
ARIZONA
FLORIDA
MISSOURI
PENNSYLVANIA
1704 Babcock Blvd.
Pittsburgh, PA 15209
(412) 822-7370
3707 E. Broadway Rd., Ste. 6
Phoenix, AZ 85040
(602) 437-2850
750 East Sample Road
Pompano Beach, FL 33064
(954) 781-6333
9876 Watson Road
St. Louis, MO 63126-2221
(314) 909-9889
CALIFORNIA
GEORGIA
NEBRASKA
PUERTO RICO
41850 Christy St.
Fremont, CA 94538-5107
(510) 657-9881
4680 River Green Parkway NW
Duluth, GA 30096
(770) 476-8911
4129 S. 84th St.
Omaha, NE 68127
(402) 597-2925
200 Guayama St.
Hato Rey, PR 00917
(787) 250-8776
14930 Northam St.
La Mirada, CA 90638-5753
(714) 522-8088
ILLINOIS
NEVADA
3375 S. Decatur Blvd.
Suites. 22 - 24
Las Vegas, NV 89102
(702) 368-4277
TENNESSEE
1120 Elm Hill P.
Suile 170 Nashville, TN 372
(615) 248-3321
1450 Feehanville Dr.
Mt. Prospect, IL 60056-6011
(847) 297-3100
1970 Fulton Avenue
Sacramento, CA 95825
(916) 482-5197
MARYLAND
TEXAS
7674 Clairemont Mesa Blvd.
San Diego, CA 92111
(858) 278-4471
7397 Washington Boulevard,
Suite 104 Elkridge, MD 21075
(410) 796-4401
NEW JERSEY
12801 Stemmons Fwy Ste. 809
Farmers Branch, TX 75234
(972) 243-1150
251 Herrod Blvd.
Dayton, NJ 08810-1539
(609) 655-1212
16735 Saticoy St., Ste. 105
Van Nuys, CA 91406
(818) 782-2440
12701 Directors Dr.
Stafford, TX 77477-3701
(281) 565-8665
MASSACHUSETTS
232 Providence Hwy.
Westwood, MA 02090
(781) 461-9754
NEWYORK
4917 Genessee Street
Cheektowaga, NY 14225
(716) 685-9503
3453 IH-35 North, Ste. 101
San Antonio, TX 78219
(210) 228-0676
COLORADO
11839 E. 51st Ave.
Denver, CO 80239-2709
(303) 371-2850
MINNESOTA
6427 Penn Ave. South
Richfield, MN 55423
(612) 869-5199
OREGON
828 19th Avenue, N.W.
Portland, OR 97209
(503) 222-1823
WISCONSIN
Lincoln Plaza Shopping Ctr.
2245 S. 108th St. West Allis, WI
53227
(414) 541-4776
CUSTOMER’S RECORD
Date Purchased
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.
Dealer’s Name & Address
Model No.
Serial No.
19
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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.
Makita Corporation
Anjo, Aichi, Japan
Made in China
Nan Zi Road, Kunshan Export Processing Zone Jiangsu, P.R. China
884425-903
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