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Makita HR1840 Manual

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7 ENGLISH
Selecting the action mode
NOTICE: Do not rotate the action mode chang-
ing knob when the tool is running.Thetoolwillbe
damaged.
NOTICE: 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 action mode positions.
Rotation with hammering
For drilling in concrete, masonry, etc., rotate the action
mode changing knob to the symbol. Use a car-
bide-tipped drill bit.
►Fig.4: 1.Actionmodechangingknob
Rotation only
For drilling in wood, metal or plastic materials, rotate
the action mode changing knob to the symbol. Use a
twist drill bit or wood drill bit.
►Fig.5: 1.Actionmodechangingknob
Torque limiter
NOTICE: As soon as the torque limiter actuates,
switch off the tool immediately.Thiswillhelppre-
vent premature wear of the tool.
NOTICE: Drill bits such as hole saw, which tend
to pinch or catch easily in the hole, are not appro-
priate for this tool.Thisisbecausetheywillcause
the torque limiter to actuate too frequently.
Thetorquelimiterwillactuatewhenacertaintorque
levelisreached.Themotorwilldisengagefromthe
output shaft. When this happens, the drill bit will stop
turning.
ASSEMBLY
CAUTION: Always be sure that the tool is
switched off and unplugged before carrying out
any work on the tool.
Side grip (auxiliary handle)
CAUTION: Always use the side grip to ensure
safe operation.
CAUTION: After installing or adjusting the
side grip, make sure that the side grip is rmly
secured.
Installthesidegripsothatthegroovesonthegriptin
theprotrusionsonthetoolbarrel.Turnthegripclock-
wisetosecureit.Thegripcanbexedatdesiredangle.
►Fig.6: 1. Side grip
Grease
Coat the shank end of the drill bit beforehand with a
small amount of grease (about 0.5 - 1 g).
Thischucklubricationassuressmoothactionandlon-
ger service life.
Installing or removing drill bit
Clean the shank end of the drill bit and apply grease
before installing the drill bit.
►Fig.7: 1. Shank end 2. Grease
Insertthedrillbitintothetool.Turnthedrillbitandpush
it in until it engages.
Afterinstallingthedrillbit,alwaysmakesurethatthe
drill bit is securely held in place by trying to pull it out.
►Fig.8: 1. Drill bit
Toremovethedrillbit,pullthechuckcoverdownallthe
way and pull the drill bit out.
►Fig.9: 1. Drill bit 2. Chuck cover
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onthesidegrip.Adjustthedepthgaugeto
thedesireddepthandtightenthesidegriprmly.
►Fig.10: 1. Hole 2. Depth gauge
NOTE: Make sure that the depth gauge does not
touch the main body of the tool when attaching it.
Dust cup (optional accessory)
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gure.Thesize
of bits which the dust cup can be attached to is as follows.
Model Bit diameter
Dust cup 5 6 mm - 14.5 mm
Dust cup 9 12 mm - 16 mm
►Fig.11: 1. Dust cup
Dust cup set (optional accessory)
NOTICE: Do not use the dust cup set when drill-
ing in metal or similar. It may damage the dust cup
set due to the heat produced by small metal dust or
similar. Do not install or remove the dust cup set with
the drill bit installed in the tool. It may damage the
dust cup set and cause dust leak.
NOTE: The standard side grip cannot be used
with the dust cup set being installed on the tool.
When the dust cup set is installed on the tool, remove
the grip from the standard side grip, and then attach it
to the optional grip base set.
Before installing the dust cup set, remove the bit from
the tool if installed.
Installthespacersothatthegroovesonthespacertin
the protrusions on the tool barrel while widening it. Be
careful for the spring not to come off from the slit of spacer.
… 7 …


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