Makita BHP440 Manuel D'instruction page 6

change lever positioned halfway between the "1"
side and "2" side, the tool may be damaged.
• Do not use the speed change lever while the tool is
running. The tool may be damaged.
Selecting the action mode
4
This tool employs an action mode changing ring. Select
one of the three modes suitable for your work needs by
using this ring.
For rotation only, turn the ring so that the arrow on the
tool body points toward the
For rotation with hammering, turn the ring so that the
arrow points toward the
For rotation with clutch, turn the ring so that the arrow
points toward the mark on the ring.
CAUTION:
• Always set the ring correctly to your desired mode
mark. If you operate the tool with the ring positioned
halfway between the mode marks, the tool may be
damaged.
Adjusting the fastening torque
4
The fastening torque can be adjusted in 16 steps by turn-
ing the adjusting ring so that its graduations are aligned
with the arrow on the tool body. The fastening torque is
minimum when the number 1 is aligned with the arrow,
and maximum when the number 16 is aligned with the
arrow.
Before actual operation, drive a trial screw into your
material or a piece of duplicate material to determine
which torque level is required for a particular application.
006609
1. Adjusting ring
2. Action mode
changing ring
3. Arrow
1
4. Graduations
2
3
mark on the ring.
mark on the ring.
006609
1. Adjusting ring
2. Action mode
changing ring
3. Arrow
1
4. Graduations
2
3
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and the
battery cartridge is removed before carrying out
any work on the tool.
Installing or removing driver bit or drill bit
Turn the sleeve counterclockwise to open the chuck jaws.
Place the bit in the chuck as far as it will go. Turn the
sleeve clockwise to tighten the chuck.
To remove the bit, turn the sleeve counterclockwise.
Hook
3
The hook is convenient for temporarily hanging the tool.
This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool hous-
ing on either side and then secure it with a screw. To
remove, loosen the screw and then take it out.
OPERATION
Hammer drilling operation
CAUTION:
• There is a tremendous and sudden twisting force
exerted on the tool/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.
First, turn the action mode changing ring so that the
arrow on the tool body points to the
adjusting ring can be aligned in any torque levels for this
operation.
Be sure to use a tungsten-carbide tipped bit.
Position the bit at the desired location for the hole, then
6
006605
1. Sleeve
1
006592
1. Screw
2. Hook
3. Groove
2
1
marking. The