Rotary Hammer
25 mm (1”)
MODEL HR2420
003095
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.
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.
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-
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.
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.
3
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.
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.
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.
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.
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.
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.
4. Be sure the bit is secured in place before
operation.
10. Do not leave the tool running. Operate the
tool only when hand-held.
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.
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.
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.
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.
5
FUNCTIONAL
DESCRIPTION
CAUTION:
•
Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
003108
Switch action
CAUTION:
1
•
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.
1. Switch trigger
003116
Reversing switch action
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 the
counterclockwise rotation.
position (B side) for
A
1
2
B
CAUTION:
•
•
Always check the direction of rotation before operation.
1. Reversing switch lever
2. Switch trigger
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.
003124
Selecting the action mode
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
For rotation with hammering, turn the knob so that the arrow
mark on the tool body.
1
1. Action mode changing knob
on the knob points toward the
mark on the tool body.
CAUTION:
•
Always set the knob fully to your desired mode mark. If
you operate the tool with the knob positioned halfway
between the mode marks, the tool may be damaged.
6
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, core bits, diamond core bits, etc. 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.
003143
Side grip (auxiliary handle)
2
The side grip swings around to either side, allowing easy
handling of the tool in any position. Loosen the side grip by
turning it counterclockwise, swing it to the desired position
and then tighten it by turning clockwise.
1
1. Side grip
2. Clamp screw
Bit grease (optional accessory)
Coat the bit shank head beforehand with a small amount of
bit grease (about 0.5 - 1 g; 0.02 - 0.04 oz.). This chuck lubri-
cation assures smooth action and longer service life.
7
003150
Installing or removing the bit
Clean the bit shank and apply bit grease before installing the
bit.
2
1
1. Bit shank
2. Bit grease
003158
Insert the bit into the tool. Turn the bit and push it in until it
engages.
If the bit cannot be pushed in, remove the bit. Pull the chuck
cover down a couple of times. Then insert the bit again. Turn
the bit and push it in until it engages.
1
2
After installing, always make sure that the bit is securely held
in place by trying to pull it out.
1. Bit
2. Chuck cover
003163
To remove the bit, pull the chuck cover down all the way and
pull the bit out.
1
2
1. Bit
2. Chuck cover
003181
Depth gauge
1
The depth gauge is convenient for drilling holes of uniform
depth. Insert the depth gauge into the hole in the grip base.
Adjust the depth gauge to the desired depth and then tighten
the clamp screw to secure the depth gauge.
2
NOTE:
•
The depth gauge cannot be used at the position where
the depth gauge strikes against the tool body.
1. Clamp screw
2. Depth gauge
8
003186
Dust cup (optional accessory)
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
003187
Bit diameter
Dust cup 5 6 mm (1/4”) - 14.5 mm (9/16”)
Dust cup 9 12 mm (15/32”) - 16 mm (5/8”)
1. Dust cup
Hammer drilling operation
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 slip-
ping 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.
CAUTION:
•
There is a 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.
002449
Blow-out bulb (optional accessory)
After drilling the hole, use the blow-out bulb to clean the dust
out of the hole.
1
1. Blow-out bulb
9
003219
Drilling in wood or metal
Use the optional drill chuck assembly. When installing it, refer
to “Installing or removing the bit” described on the previous
page.
Set the action mode changing knob to “rotation only”.
1
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.
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.
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.
10
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
Drill chuck assembly
Drill chuck S13
Chuck adapter
Chuck key S13
Bit grease
Grip assembly
Depth gauge
Blow-out bulb
Dust cup
Dust extractor attachment
Safety goggles
Plastic carrying case
11
Memo
12
Stamp
Timbre
Makita Canada Inc.
1950 Forbes Street,
Whitby, Ontario
L1N 7B7
Fold
Your answers to the following questions are appreciated.
1.This product was purchased from?
3. How did you first learn of Makita Power Tools?
Hardware/lumber Store
Tool Distributor
Industrial Supply
Other (
Magazine/Newspaper
From dealer
Catalog
Other (
)
)
Store display
2. Use of the product is intended for?
4. Most favored points are?
Construction trade
Home maintenance
Other (
Design
Makita Brand
Power
Industrial maintenance
)
Features
Size
Other (
)
Price
5. Any comments?
Certificate of Warranty
Mail to Makita
Date Purchased
Model No.
Serial No.
Month
Day
Year 20
Male Female
Single
Married
Initial Last Name
Street Address
City
Province
Postal Code
Under 19
20-29
30-39
40-49
Over 50
AGE:
Occupation:
Dealer's Name & Address:
Paste
Paste
Paste
Paste
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Paste
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Factory Service Centres
Head Office:
1950 Forbes St., Whitby, Ontario, L1N 7B7
(905) 571 - 2200 1-800-263-3734
Regional Office:
11771 Hammersmith Way, Richmond
B.C. V7A 5H6
(604) 272 - 3104 1-800-663-0909
Regional Office:
6389 boul. Couture, St. Leonard, Quebec
(Montreal)
H1P 3J5
(514) 323 - 1223 1-800-361-7049
(902) 468 - 7064 1-888-625-4821
Dartmouth:
202 Brownlow Avenue
Dartmouth, N.S., B3B 1T5
Ville St. Laurent:
(Montreal)
1140 Rue Bégin, Ville St. Laurent, Quebec
H4R 1X1
(514) 745 - 5025 1-888-745-5025
Les Saules:
(Quebec)
1200 St. Jean Baptiste, Unit 106, Les Saules,
Quebec, G2E 5E8
(418) 871 - 5720 1-800-663-5757
Nepean:
(Ottawa)
210 Colonnade Road, Unit 11, Nepean,
Ontario, K2E 7M1
(613) 224 - 5022 1-888-560-2214
Whitby:
1950 Forbes St., Whitby, Ontario, L1N 7B7
(905) 571 - 2200 1-800-263-3734
London:
317 Adelaide St. S., Unit 117, London,
Ontario, N5Z 3L3
(519) 686 - 3115 1-800-571-0899
Mississauga:
Calgary:
6350 Tomken Rd., Unit 8, Mississauga,
Ontario, L5T 1Y3
(905) 670 - 7255 1-888-221-9811
#8-6115 Fourth St. S.E., Calgary
Alberta, T2H 2H9
(403) 243 - 3995 1-800-267-0445
Edmonton:
Richmond:
Coquitlam:
Winnipeg:
Saskatoon:
11614-149 Street, Edmonton, Alberta,
T5M 3R3
(780) 455 - 6644 1-888-455-6644
11771 Hammersmith Way, Richmond, B.C.,
V7A 5H6
(604) 272 - 3104 1-800-663-0909
2131 Hartley Ave., #103
Coquitlam, B.C. V3K 2Z3
(604) 525 - 7434 1-800-266-7738
1670 St. James Street, Winnipeg, Manitoba,
R3H 0L3
(204) 694 - 0402 1-800-550-5073
206A-2750 Faithful Avenue Saskatoon,
Saskatchewan, S7K 6M6
(306) 931 - 0111 1-888-931-0111
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
CUSTOMER RECORD
When you need service...
DATE
• Explain the problem in a letter
PURCHASED:
• Enclose the letter with the tool
DEALER’S NAME
• Package carefully and send prepaid
& ADDRESS:
to the nearest Makita factory or
authorized service centre
MODEL NO.:
SERIAL NO.:
15
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 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.
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.
“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 Corporation
3-11-8, Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan
884089-232
|