Hitachi Koki WM 18DBL Instrucciones De Seguridad Y Manual De Instrucciones página 14

English
Operation Maximum
Marking
mode
3
Electronic
2
pulse mode
1
292 in-lbs
Bolt mode
{33 N·m}
2
Self drilling
screw mode
1
97 in-lbs
Drill mode
{11 N·m}
5 47 in-lbs
4 {5.3 N·m}
Electronic
3
clutch mode
2 20 in-lbs Gypsum board fixing
*3
1 {2.3 N·m}
*1: Before fixing a thin plate with a self drilling screw, make sure that the thickness of the plate is suitable for
the screw diameter.
*2: With the electronic clutch mode 4 or 5, the tool may execute reverse rotation briefly when the load
increases in order to reduce a risk of screw-head damage.
*3: The tool starts up in low rotation speed and tightens softly.
The motor automatically stops rotating when the torque reaches to the number set on the dial in order to
reduce over tightening.
The clutch sound such as of the mechanical type will not be generated.
2. Characteristics of Electronic Pulse Driver
Unlike a conventional impact driver, the electronic
pulse driver generates the striking force by rotating
the motor in regular and reverse directions
repeatedly.
This mechanism has helped to provide quieter
operation.
The following characteristics are uncommon to a
conventional impact driver, however these are not
signs of malfunction.
The tool tends to be heated by continuous screw
tightening.
To protect the motor and electronic parts that
control the motor operation, this tool is equipped
with a temperature protection circuit.
Depending on the screw and material being
screwed, the striking operation may start early.
Since the striking operation causes temperature
increase of the motor and electronic parts, the
temperature protection circuit may be activated
early.
Refer to "1. Continuous operation" on page 17 for
recovering from the operation stop caused by the
temperature protection circuit.
14
Table 5 Example of mode selection
torque
Diagonal tightening of 3" (75 mm) screw
Wood
screw Tightening of screw 2" (50 mm) – 3" (75 mm)
tightening
Tightening screw shorter than 2" (50 mm)
Bolt tightening
Self drilling screw tightening {3/16" (5 mm) or 1/4" (6 mm)}
Self drilling screw tightening {1/8" (3.5 mm) or 5/32" (4 mm)}
Drilling
*2
Machine screw (M6) or tapping screw tightening,
Application
Also, the electronic pulse driver controls the motor
rotation consistently to provide the optimum
operation for each mode.
Because of this, the following cases can occur
during operation.
The behavior at operation start differs by the mode.
The self drilling screw mode (1) gradually increases
the speed.
The electronic clutch mode (regular rotation)
rotates the motor at a very slow speed for a certain
period after the start and then increases the speed.
On the other hand, the electronic clutch mode
(reverse rotation) meets the preset rotation speed
immediately after the start.
Notes
Use the bit
and socket
which are
suitable for
the screw
*1
diameter.
When using
the drill mode,
be sure not to
stop the motor
rotation.