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Makita HR5212C Manual

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12. Do not point the tool at any one in the area when
operating. The bit could fly out and injure
someone seriously.
13. Do not touch the bit or parts close to the bit
immediately after operation; they may be
extremely hot and could burn your skin.
14. 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:
DO NOT let comfort or familiarity with product
(gained from repeated use) replace strict adherence
to safety rules for the subject product. MISUSE or
failure to follow the safety rules stated in this
instruction manual may cause serious personal
injury.
FUNCTIONAL DESCRIPTION
CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Switch action
CAUTION:
• Before plugging in the tool, always check to see that
the switch trigger actuates properly and returns to the
“OFF” position when released.
Switch trigger (Fig. 1)
This switch functions when setting the tool in
symbol
and symbol modes.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
Switch button (Fig. 2)
This switch functions when setting the tool in symbol
mode.
When the tool is in the symbol mode, the switch
button projects out and lights in red.
To start the tool, press the switch button. The switch light
turns in green.
To stop the tool, press the switch button again.
Speed change (Fig. 3)
The revolutions and blows per minute can be adjusted
just by turning the adjusting dial. The dial is marked 1
(lowest speed) to 5 (full speed).
Refer to the table below for the relationship between the
number settings on the adjusting dial and the revolutions/
blows per minute.
For Model HR4003C, HR4013C
014134
For Model HR5202C, HR5212C
014872
For Model HR4013C, HR5212C only
NOTE:
• Blows at no load per minute becomes smaller than
those on load in order to reduce vibration under no
load, but this does not show trouble. Once operation
starts with a bit against concrete, blows per minute
increase and get to the numbers as shown in the table.
When temperature is low and there is less fluidity in
grease, the tool may not have this function even with
the motor rotating.
CAUTION:
• If the tool is operated continuously at low speeds for a
long time, the motor may get overloaded, resulting in
tool malfunction.
• The speed adjusting dial can be turned only as far as 5
and back to 1. Do not force it past 5 or 1, or the speed
adjusting function may no longer work.
Selecting the action mode
CAUTION:
• Do not rotate the change lever when the tool is running.
The tool will be damaged.
• To avoid rapid wear on the mode change mechanism,
be sure that the change lever is always positively
located in one of the action mode positions.
Hammer drilling mode (Fig. 4)
For drilling in concrete, masonry, etc., rotate the change
lever to the symbol. Use a tungsten-carbide tipped
bit.
Hammering mode (Switch trigger mode) (Fig. 5)
For chipping, scaling or demolition operations, rotate the
change lever to the symbol. Use a bull point, cold
chisel, scaling chisel, etc.
Hammering mode (Switch button mode)
For continuous chipping, scaling or demolition
operations, rotate the change lever to the symbol.
(Fig. 6)
The switch button projects out and lights in red.
Use a bull point, cold chisel, scaling chisel, etc. (Fig. 7)
NOTE:
• When using the tool in the symbol mode, the switch
trigger does not work but only the switch button works.
Torque limiter
The torque limiter actuates when torque reaches a
certain level. The motor disengages from the output
shaft. When this happens, the bit stops turning.
CAUTION:
• As soon as the torque limiter actuates, switch off the
tool immediately. This helps to prevent premature wear
of the tool.
Number on
adjusting dial
Revolutions per
minute
Blows per
minute
5 500 2,900
4 470 2,700
3 380 2,150
2 290 1,650
1 250 1,450
Number on
adjusting dial
Revolutions per
minute
Blows per
minute
5 310 2,250
4 290 2,100
3 230 1,700
2 180 1,300
1 150 1,100
… 7 …


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