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Makita HR1840 Manual

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8 ENGLISH
►Fig.12: 1. Spacer 2. Spring
►Fig.13
Install the side grip (optional grip base set and standard
grip)sothatthegrooveonthegriptintheprotrusion
onthespacer.Turnthegripclockwisetosecureit.
►Fig.14: 1. Side grip
Install the dust cup set so that the claws of the dust cup
tinintheslitsonthespacer.
►Fig.15: 1. Dust cup 2. Claw
NOTE: If you connect a vacuum cleaner to the dust
cup set, remove the dust cap before connecting it.
►Fig.16: 1. Dust cap
Toremovethedrillbit,pullthechuckcoverdownallthe
way and pull the drill bit out.
►Fig.17: 1. Bit 2. Chuck cover
Toremovethedustcupset,holdtherootofdustcup
and pull it out.
►Fig.18
NOTE: If the cap comes off from the dust cup, attach
it with its printed side facing up so that groove on the
captsintheinsideperipheryoftheattachment.
►Fig.19
OPERATION
CAUTION: Always use the side grip (auxiliary
handle) and rmly hold the tool by both side grip
and switch handle during operations.
CAUTION: Always make sure that the work-
piece is secured before operation.
►Fig.20
Hammer drilling operation
CAUTION:Thereistremendousandsudden
twistingforceexertedonthetool/drill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 rmly hold the tool by
both side grip and switch handle during opera-
tions. Failure to do so may result in the loss of control
ofthetoolandpotentiallysevereinjury.
Set the action mode changing knob to the symbol.
Position the drill 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
drill bit partially from the hole. By repeating this several times, the
hole will be cleaned out and normal drilling may be resumed.
NOTE: Eccentricity in the drill bit rotation may occur
whileoperatingthetoolwithnoload.Thetoolauto-
maticallycentersitselfduringoperation.Thisdoesnot
affect the drilling precision.
Drilling in wood or metal
CAUTION: Hold the tool rmly and exert care
when the drill bit begins to break through the
workpiece.Thereisatremendousforceexertedon
the tool/drill bit at the time of hole break through.
CAUTION: A stuck drill 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 rmly.
CAUTION: Always secure workpieces in a
vise or similar hold-down device.
NOTICE: Never use “rotation with hammering”
when the drill chuck is installed on the tool.The
drill chuck may be damaged.
Also,thedrillchuckwillcomeoffwhenreversingthe
tool.
NOTICE: 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 drill
bit, decrease the tool performance and shorten the
service life of the tool.
Set the action mode changing knob to the symbol.
Attachthechuckadaptertoakeylessdrillchuckto
which1/2"-20sizescrewcanbeinstalled,andthen
install them to the tool. When installing it, refer to the
section “Installing or removing drill bit”.
►Fig.21: 1. Keyless drill chuck 2. Chuck adapter
Blow-out bulb
Optional accessory
Afterdrillingthehole,usetheblow-outbulbtocleanthe
dust out of the hole.
►Fig.22
Using dust cup set
Optional accessory
Fit the dust cup set against the ceiling when operating
the tool.
►Fig.23
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.
NOTICE: 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.
… 8 …


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