Operation - Makita BDF444 Instruction Manual

Selecting action mode (Fig. 6)
This tool has an action mode change lever. For drilling,
slide the action mode change lever to the left (
For screwing, slide the action mode change lever to the
right ( symbol).
NOTE:
• When changing the position from "
be a little difficult to slide the mode change lever. At this
time, switch on and run the tool for a second at the "
position, then stop the tool and slide to your desired
position.
CAUTION:
• Always slide the action mode change lever all the way
to your desired mode position. If you operate the tool
with the lever positioned halfway between the mode
symbols, the tool may be damaged.
• Do not use the action mode change lever while the tool
is running. The tool may be damaged.
Adjusting the fastening torque (Fig. 7)
The fastening torque can be adjusted in 16 steps by
turning the adjusting ring so that its graduations are
aligned with the pointer on the tool body.
First, slide the action mode change lever to the position
of symbol.
The fastening torque is minimum when the number 1 is
aligned with the pointer, and maximum when the marking
is aligned with the pointer. The clutch will slip at various
torque levels when set at the number 1 to 16.
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.
NOTE:
• The adjusting ring does not lock when the pointer is
positioned only halfway between the graduations.
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 side grip (auxiliary handle)
(Fig. 8)
Always use the side grip to ensure operating safety.
Insert the side grip so that the protrusions on the grip base
and steel band fit in between the grooves on the tool
barrel. Then tighten the grip by turning clockwise.
Installing or removing driver bit or drill bit
(Fig. 9)
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.
Installing bit holder (Fig. 10)
Fit the bit holder into the protrusion at the tool foot on
either right or left side and secure it with a screw.
When not using the driver bit, keep it in the bit holders.
Bits 45 mm long can be kept there.
Hook (Fig. 11)
The hook is convenient for temporarily hanging the tool.
symbol). This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool
housing on either side and then secure it with a screw.
To remove, loosen the screw and then take it out.
" to " ", it may

OPERATION

"
Screwdriving operation (Fig. 12)
First, slide the action mode change lever so that it points
to the
torque level for your work. Then proceed as follows.
Place the point of the driver bit in the screw head and
apply pressure to the tool. Start the tool slowly and then
increase the speed gradually. Release the switch trigger
as soon as the clutch cuts in.
NOTE:
• Make sure that the driver bit is inserted straight in the
• When driving wood screws, predrill pilot holes to make
NOTE:
• If the tool is operated continuously until the battery
Drilling operation
Drilling in wood
When drilling in wood, the best results are obtained with
wood drills equipped with a guide screw. The guide screw
makes drilling easier by pulling the bit into the workpiece.
Drilling in metal
To prevent the bit from slipping when starting a hole,
make an indentation with a center-punch and hammer at
the point to be drilled. Place the point of the bit in the
indentation and start drilling.
Use a cutting lubricant when drilling metals. The
exceptions are iron and brass which should be drilled dry.
First, slide the action mode change lever so that it points
to the
torque levels for this operation. Then proceed as follows.
CAUTION:
• Pressing excessively on the tool will not speed up the
marking. Adjust the adjusting ring to the proper
screw head, or the screw and/or bit may be damaged.
driving easier and to prevent splitting of the workpiece.
See the chart.
Nominal diameter of wood
screw (mm)
3.1
3.5
3.8
4.5
4.8
5.1
5.5
5.8
6.1
cartridge has discharged, allow the tool to rest for
15 minutes before proceeding with a fresh battery.
marking. The adjusting ring can be aligned in any
drilling. In fact, this excessive pressure will only serve
Recommended size of pilot
hole (mm)
2.0 - 2.2
2.2 - 2.5
2.5 - 2.8
2.9 - 3.2
3.1 - 3.4
3.3 - 3.6
3.7 - 3.9
4.0 - 4.2
4.2 - 4.4
7