Makita 2-SPEED HAMMER 8401 User manual

2-Speed Hammer Drill
No load speed
(RPMI
Capacities
Steel Wood Concrete
Speed
13 mm (112”) MODEL 8401
Variable Speed I Reversing
Blows Overall
per minute length
INSTRUCTION MANUAL
High
Low
DOUBLE
INS U L AT ION
:.;$,: :&:: 0 - 2,800 0 ~ 30,800
13
mm 30 mm 13 mm (12-7/32”)
310 mm
(,/2”) ,l-l/8r,) (1/2“] 0 ~ 1,100 0 ~ 12,100
SPEC IF I CAT I 0 N S
Net
weight
2.2
kg
(4.5 Ibsl
* Manufacturer reserves the right to change specifications without notice.
* Note: Specifications may differ from country to country.

IMPORTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING: WHENUSINGELECTRICTOOLS, BASICSAFETY
PRECAUTIONSSHOULDALWAYS BE FOLLOWEDTO REDUCE
THE RISK OF FIRE, ELECTRIC SHOCK, AND PERSONAL
INJURY, INCLUDINGTHE FOLLOWING:
READ ALL INSTRUCTIONS.
1.
2.
3.
4.
5.
6.
7.
8.
9.
IO.
11.
12.
13.
2
KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
CONSIDER WORK AREA ENVIRONMENT. Don't use power tools
in damp
or wet locations. Keep work area well lit. Don't expose power tools to rain.
Don't use tool
in presence of flammable liquids or gases.
KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact tool or extension cord.
STORE IDLETOOLS. When not
in use, tools should bestored in dry, andhigh
or locked-up place
- out of reach of children.
DON'T FORCETOOL.
It will dothejob better andsafer at the ratefor which
it was intended.
USE RIGHT TOOL. Don't force small tool or attachment to do thejob of a
heavy-dutytool. Don't usetool for purposenot intended; for example, don't
use circular saw for cutting tree limbs or logs.
DRESS PROPERLY. Don't wear looseclothing orjewelry. Theycan becaught
in moving parts. Rubber gloves and non-skid footwear are recommended
when working outdoors. Wear protective hair covering to contain long hair.
USE SAFETY GLASSES. Also use face or dust mask if cutting operation is
dusty.
DON'T ABUSE CORD. Never carry tool bycordor yank it todisconnect from
receptacle. Keep cord from heat, oil, and sharp edges.
SECURE WORK. Use clamps or a vise to hold work. It's safer than using
your hand and
it frees both hands to operate tool.
DON'T OVERREACH. Keep proper footing and balance at
all times.
MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and
safer performance. Follow instructions for lubricating and changing acces-
sories. Inspecttoolcordsperiodicallyandif damaged, have repairedby autho-
rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.
DISCONNECTTOOLS. When not
in use, beforeservicing, and when chang-
ing accessories, such as blades, bits, cutters.

14. REMOVE ADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keysand adjusting wrenches are removed fromtoolbefore turning
it on.
15. AVOID UNINTENTIONALSTARTING. Don't carry toolwithfinger onswitch.
Be sure switch is OFF when plugging
in.
16. EXTENSION CORDS. 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 linevoltage resulting in loss of power andoverheating. Table 1 shows the
correct size touse depending oncord lengthand 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 SETS
0- 6
6
- 10
10 - 12
12
- 16
~~ ~ ~
Total Length of Cord in Feet
0-25
I 26 - 50 I 51 - 100 I 101 - 150
18 16 14
16 16 14 12
14 12 Not Recommended
18 16
;: I 12
Ampere Rating
More Not More
Than Than AWG
3

VOLTAGE WARNING: Before connecting thetool toa power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on
the
nameplate of the tool. A power source with voltage greater than that specified
for the tool can result inSERIOUS INJURYto the user
- as well as damage to
the tool.
If in doubt, DO NOT PLUG IN THE TOOL. Using a power source with
voltage less than the nameplate rating is harmful to the motor.
ADDITIONAL SAFETY RULES
1. Wear a hard hat (safety helmet), safety glasses and/or face shield. It is also
highly recommended that you wear a dust mask, ear protectors and thickly
padded gloves.
2. Undernormaloperation, thetoolisdesignedtoproducevibration. The screws
can come loose easily, causing a breakdown or accident. Check tightness of
screws carefully before operation.
3. Always be sure you have a firm footing.
Be sure no one is below when using the tool in high locations.
4. Hold the tool firmly with both hands. Always use the side grip.
5. Keep hands away from rotating parts.
6. Do not leave the tool running. Operate the tool only when hand-held.
7. When drilling into walls, floors or wherever "live" electrical wires may be
encountered,
DO NOT TOUCH ANY METAL PARTS OF THE TOOL!
Holdthe tool by the insulated grasping surfaces to prevent electric shock if
you drill into a "live" wire.
8. Do nottouchthe bitor the workpiece immediately after operation; they may
be extremely hot and could burn your skin.
SAVE THESE INSTRUCTIONS.
4

Installing side grip (auxiliary handle)
The side grip is an important means of maintaining good control of this hammer drill
during use in the even bit or accessory jams, causing the tool
twist from your handwith
the potential tocause injury. Loosenthe wing nut on the side grip and install the side grip
on the tool. The side grip swings around toeither side, allowing easy handling of the tool
in any position. Swing the side grip tothe desired position and then tighten the wing nut
tosecure the side grip.
Installing or removingdrill bit
CAUTION
:
Always be sure that the tool is switched off and unpluggedbefore installing or removing
the bit.
To install the bit, place
it in the chuck as
far as it willgo. Tighten the chuck by hand.
Place the chuck key in each of the three
holes and tighten clockwise. Be sure to
tighten
all three chuck holes evenly.
To remove the bit, turn the chuck key
counterclockwise in just one hole, then
loosenthe chuck by hand.
After usingthe chuck key, be sure to return
it tothe original position.
Depth gauge
The depth gauge
is convenient for drilling
holes of uniform depth. Loosen the wing
bolt and adjust the depth gauge to the de-
sired depth. After adjusting, tighten the
wing boltto secure the depth gauge.
5

Switchaction
Tool speed
is increased by increasingpres-
sure on the trigger. To start the tool,
simply pull the trigger.
Release the trigger
to stop. For continuous operation, pull the
trigger and then push in the lock button.
To stop the tool while in the locked posi-
tion, pull the trigger fully, then release
it.
A speed control screw is provided so that
tool speed can be maintained
at a constant
speed other than
its maximum speed. Turn
the speed control screw clockwise for
higher speed, and counterclockwise for
lower speed.
Trigger
switch
LO~ 11 4
button
CAUTION :
Before plugging in the tool, always check to see that the trigger switch actuates properly
and returns to the "OFF" position when released.
Reversingswitch action
This tool has
a reversing switch to change
the direction
of rotation. Move the revers-
ing switch lever to the
"FWD" position for
clockwise rotation or the
"REV" position
for counterclockwise rotation.
Reversing switch lever
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.
Speed change
A gear shift mechanism allows tool opera-
tion within
two versatile speed ranges. For
higher speeds, turn the speed change lever
so that its A mark is aligned with the "11"
mark on the tool body. For lower speeds,
turn the speed change lever
so that its A
mark is aligned with the "I" mark on the
tool
body.
Speed change lever
/
6

Action mode changing button
Action mode
This tool employs action mode changing
buttons. For rotation only, press the
button on the
SX- mark side fully.
For rotation with hammering action, press
the buttonon the
c mark side fully.
CAUTION
:
Be sure to press the action mode changingbutton as far as it will go, Failure todo so may
cause malfunction of the tool.
Operation
1 ) Hammer drilling operation
When drilling in concrete, granite, tile, etc., press the button on the
c mark side
fully. Be sure to use
a tungsten-carbide tipped bit. Do not apply more pressurewhen
the hole becomes cloggedwith chips or particles. Instead, run the tool
at an idle, then
remove the bit partially from the hole. By repeatingthis several times, the hole will be
cleaned out.
2) Drillingoperation
When drilling in wood, metal or plastic materials, press the button on the mark
side fully. Generally, select higher speeds for smaller diameter bits and lower speeds
for largerdiameter bits.
0 Drilling in wood
When drilling in wood, best results are obtained with wood drills equipped with a
guide screw. The guide screw makes drilling easier by pulling the bit into the work-
piece.
To prevent the bit from slipping when starting
a hole, make an indentation with a
centerpunch and hammer at the point to be drilled. Placethe point of the bit in the
indentation and start drilling. Use
a cutting lubricant when drilling metals.The excep-
tions are iron and brass which should be drilled dry.
Drilling in metal
7

CAUTION :
.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.
0 There is a tremendoustwisting force exertedon thetool/bit at the timeof hole break-
through. Hold the tool firmly and exert care when the bit begins tobreak through
the workpiece. Use both hands to help control the tool. Be sure
to use the side grip
(auxiliary handle)to maintain proper control.
0 A stuck bit can be removed simply by setting the reversingswitch to reverse rotation
in order to back out. However, the tool may back out abruptly if you do not hold
it
firmly.
0 Always secure small workpieces in a vise or similar hold-downdevice.
*The use of wire brushes and other accessories on this tool may easily cause jamming,
pinching or bindingwhereby the
tool could be twisted unsafely from your hands.
8

MAINTENANCE
CAUTION :
Always be sure that the tool is switched offand unpluggedbeforeattempting toperform
inspectionor maintenance.
To maintain product SAFETY and RELlABl LITY, repairs, carbon brush inspectionand
replacement, any other maintenance or adjustment should be performed by Makita
Authorized or Factory Service Centers, always usingMakita replacementparts.
9

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. The
accessories or attachments should be used only in the proper and intendedmanner.
711121-A
711122-A
711123-A
0 Tungsten-carbide tipped
(hammer) bit
114" 4"
114" 6'
511 6' 6'
0 Depth gauge
Part No. 321059-7
711124-A
I 318"
Part
No. I Bit diameter I Overall length
6"
711120-A
1 3/16' I 4"
711125-A
I 112" 6'
0 Blow-out bulb
Part No. 765009-6
4
711128-A 1 /4'
71 1129-A 318" .Steel carrying case
711130-A 112" 13' Part No. 182463-3
0 Chuck key
Part No. 763411-7
0 Grip
Part No. 273627-1
10