DeWalt DW900 Manual De Instrucciones página 25

E N G L I S H
• Remove the bit by pulling the bit holder forwards
and pulling the bit firmly off the bit holder.
Forward/Reverse slider (fig. B)
• To select forward or reverse rotation, use the
forward/reverse slider (2) as shown (see arrows
on tool).
• Always release the variable speed switch and wait
until the motor has come to a complete standstill
before changing the direction of rotation.
Torque adjustment (fig. B, C & D)
Your D WALT precision torque screwdriver can be
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used for screwdriving operations requiring a precise
torque. The torque adjustment allows settings
between 1.5 and 4.5 Nm, in increments of 0.08 Nm.
• Check the screw manufacturer's specifications
for the proper torque for the screw being used.
• Insert the 1/4" Allen key (10) supplied with the
tool in the bit holder (5) and turn it until a click is
heard (fig. B).
• Insert the wire frame (7) into the two holes (3) as
shown in fig. C.
• Adjust until the symbol ↔ appears in the window (6).
• Remove the wire frame.
• Reinsert the wire frame as shown in fig.D.
• Insert the 1/4" Allen key into the bit holder.
The exact torque depends of the size and type of
screw and the material being used.
• Turn the 1/4" Allen key to the desired level:
to increase the torque, turn counterclockwise (+);
to decrease the torque, turn clockwise (-); each
click corresponds to 0.08 Nm.
• Drive a screw into a piece of waste material.
• Measure the torque using a torque meter. If
necessary, adjust the torque as described above.
The torque repeatability is illustrated in the graph
below:
Torque repeatability
± 4.4%
Hard joint 30º
± 3.7%
Soft joint 720º
1.5 Nm
Torque range
en - 5
± 4.5% ± 7.7% ± 3.1%
± 3.1% ± 2.3% ± 1.8%
1.8 Nm 2.5 Nm 3.2 Nm 4.1 Nm
Instructions for use
Always observe the safety instructions
and applicable regulations.
Prior to operation:
• Insert the appropriate bit.
• Make sure your battery pack is (fully) charged.
Switching ON and OFF (fig. A)
• To run the tool, press the switch (1).
• The tool stops automatically when it reaches its
set torque level.
• To lock the tool in OFF-position, move the
forward/reverse slider (2) to the central position.
Screwdriving (fig. A)
• Select forward or reverse rotation using the slider (2).
• Insert the tip of the screwdriver bit into the slot of
the screw.
• Keep the tool in line with the screw and apply
pressure to it as soon as the tool touches the
surface.
• Press the switch (1).
• As soon as the adjusted torque level is reached
the motor stops and the torque level indicator (8)
will light.
• Check the torque with a torque meter.
Tightening time
Your D WALT precision torque screwdriver needs
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only a few seconds to tighten most the screws.
The exact tightening time and torque ratio will be
determined by experience.
Tightening screws too firmly can lead to
damages to both the screwdriver bit and
the screw head.
Various types of 1/4" hex. bits, holders and adaptors
are available as an option. Always use accessories
± 2.5%
suitable for this specific tool.
Consult your dealer for further information on the
± 4.2%
appropriate accessories.
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