Drilling Operation; Screwdriving Operation - Makita DDF343 Instruction Manual

Hook (Accessory)
► 1. Screw 2. Groove 3. Hook
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
housing on either side and then secure it with a screw.
To remove, loosen the screw and then take it out.
OPERATION
CAUTION:
• Always insert the battery cartridge all the way
until it locks in place. If you can see the red part
on the upper side of the button, it is not locked
completely. Insert it fully until the red part cannot
be seen. If not, it may accidentally fall out of the
tool, causing injury to you or someone around
you.

Screwdriving operation

CAUTION:
• Adjust the adjusting ring to the proper torque
level for your work.
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.
1
2
3
CAUTION:
• Make sure that the driver bit is inserted straight
in the screw head, or the screw and/or bit may
be damaged.
NOTE:
• When driving wood screws, predrill pilot holes
to make driving easier and to prevent splitting of
the workpiece. See the chart.
Nominal diameter of wood screw
(mm)
3.1 (1/8")
3.5 (9/64")
3.8 (5/32")
4.5 (11/64")
4.8 (3/16")
5.1 (13/64")
5.5 (7/32")
5.8 (7/32")
6.1 (15/64")

Drilling operation

First, turn the adjusting ring so that the pointer points to
the marking. Then proceed as follows.
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 excep-
tions are iron and brass which should be drilled dry.
CAUTION:
• 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 bit,
decrease the tool performance and shorten the
service life of the tool.
• There is a tremendous force exerted on the tool/
bit at the time of hole break through. Hold the
tool firmly and exert care when the bit begins to
break through the workpiece.
• A stuck 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 firmly.
• Always secure small workpieces in a vise or
similar hold-down device.
• If the tool is operated continuously until the
battery cartridge has discharged, allow the tool
to rest for 15 minutes before proceeding with a
fresh battery.
7 ENGLISH
Recommended size of pilot hole
(mm)
2.0 - 2.2 (5/64" - 3/32")
2.2 - 2.5 (3/32" - 3/32")
2.5 - 2.8 (3/32" - 7/64")
2.9 - 3.2 (7/64" - 1/8")
3.1 - 3.4 (1/8" - 9/64")
3.3 - 3.6 (1/8" - 9/64")
3.7 - 3.9 (9/64" - 5/32")
4.0 - 4.2 (5/32" - 11/64")
4.2 - 4.4 (11/64" - 11/64")