Makita HR3550C Betriebsanleitung Seite 8

OPERATING INSTRUCTIONS
Installing or removing bit
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
Clean the bit shank and apply the bit grease provided
to it before installing the bit. (Fig. 1)
Insert the bit into the tool. Turn the bit and push it in
until it engages. (Fig. 2)
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.
(Fig. 3)
After installing, always make sure that the bit is
securely held in place by trying to pull it out.
To remove the bit, pull the chuck cover down all the
way and pull the bit out. (Fig. 4)
Selecting action mode
When selecting an action mode, first set the change
lever and the shift lever to the position shown in
Fig. 5. Then proceed as follows.
Rotation with hammering (Fig. 6 & 7)
For drilling in concrete, masonry, etc., depress the
lock button and rotate the change lever so that the
pointer points to the
carbide tipped bit.
Hammering only (Fig. 6 & 8)
For chipping, scaling or demolition operations,
depress the lock button and rotate the change lever
so that the pointer points to the
point, cold chisel, scaling chisel, etc.
Rotation only (Fig. 6 & 9)
For drilling in wood, metal or plastic materials, rotate
the shift lever so that the
pointer on the change lever. Use a twist drill bit or
wood bit.
CAUTION:
• Do not rotate the change lever and/or the shift lever
when the tool is running under load. The tool will be
damaged.
• To avoid rapid wear on the mode change mecha-
nism, be sure that the change lever and/or the shift
lever is always positively located in one of the three
action mode positions.
• The action mode cannot be changed directly from
''hammering only'' to ''rotation only'' or from ''rotation
only'' to ''hammering only''. First set the change
lever and the shift lever to ''rotation with hammer-
ing'' mode position shown in Fig. 5. Then set them
to the position for ''hammering only'' or ''rotation
only''.
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Accept SDS-top Bit
symbol. Use a tungsten-
symbol. Use a bull
symbol is aligned with the
Bit angle
(when chipping, scaling or demolishing)
Important:
Always be sure that the tool is switched off and
unplugged before changing the bit angle.
The bit can be secured at 12 different angles. To
change the bit angle, depress the lock button and
rotate the change lever so that the pointer points to
the V symbol. Turn the bit to the desired angle.
(Fig. 10)
Depress the lock button and rotate the change lever
so that the pointer points to the
Then make sure that the bit is securely held in place
by turning it slightly. (Fig. 11)
Side grip (Fig. 12)
CAUTION:
• Always use the side grip to ensure operating safety
when drilling in concrete, masonry, etc.
• When the bit begins to break through concrete or if
the bit strikes reinforcing rods embedded in con-
crete, the tool may react dangerously. Maintain
good balance and safe footing while holding the tool
firmly with both hands to prevent dangerous reac-
tion.
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 clock-
wise.
Switch action (Fig. 13)
CAUTION:
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 trigger. Release the
trigger to stop.
Speed change (Fig. 14)
The revolutions and blows per minute can be adjusted
just by turning the adjusting dial. The dial is marked 1
(lowest speed) to 6 (full speed). Refer to the table
below for the relationship between the number set-
tings on the adjusting dial and the revolutions/blows
per minute.
Number on Revolutions
adjusting dial per minute
6 720
5 690
4 590
3 490
2 390
1 360
symbol.
Blows per
minute
3,300
3,150
2,700
2,250
1,800
1,650