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Using An Extension Cable; Assembly And Adjustment - DeWalt D21720 Manual

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Your D
WALT tool is double insulated in
E
accordance with IEC60745; therefore no
earth wire is required.

Using an extension cable

If an extension cable is required, use an approved
extension cable suitable for the power input of this
tool (see technical data). The minimum conductor
2
size is 1.5 mm
. When using a cable reel, always
unwind the cable completely.
Also refer to the table below.
2
Conductor size (mm
)
0.75
1.00
1.50
2.50
4.00
Voltage
Amperes
115
0 - 2.0
2.1 - 3.4
3.5 - 5.0
5.1 - 7.0
7.1 - 12.0
12.1 - 20.0
220-240
0 - 2.0
2.1 - 3.4
3.5 - 5.0
5.1 - 7.0
7.1 - 12.0
12.1 - 20.0

Assembly and adjustment

Prior to assembly and adjustment always
unplug the tool.
Selecting the operating mode (fig. B)
Percussion drill can be used in two operating modes:
Rotary drilling:
for steel, wood and plastics.
Percussion drilling:
simultaneous rotating and impacting for
concrete and masonry drilling operations.
Cable rating (Amperes)
6
10
15
20
25
Cable length (m)
7.5
15
25
30
45
Cable rating (Amperes)
6
6
6
6
6
6
6
6
15
6
6
10
15
20
10
10
15
20
20
15
15
20
25
25
20
20
25
-
6
6
6
6
6
6
6
6
6
6
6
6
10
10
10
10
10
15
15
15
15
15
20
20
20
20
20
25
• Select the required operating mode by rotating
the mode selector (5) to the required position.
Inserting and removing a bit (fig. A)
Keyed chuck
• Open the chuck by turning the sleeve (9)
counterclockwise and insert the bit shank.
• Put the chuck key (10) into each hole in the side
of the chuck and turn clockwise until tight.
• To remove the bit, proceed in reverse order.
Fitting the side handle (fig. A)
The side handle (6) can be fitted to suit both RH-
and LH-users.
• Loosen the side handle.
60
• For RH-users, slide the side handle clamp over
the collar behind the chuck, handle at the left.
6
10
• For LH-users, slide the side handle clamp over
15
the colar behind the chuck, handle at the right.
20
• Rotate the side handle to the desired position
25
and tighten the handle.
-
-
-
Setting the drilling depth (fig. C)
6
6
• Insert the required drill bit into the chuck.
6
6
• Slacken the side handle (6).
15
• Fit the depth adjustment rod (7) through the hole
15
in the side handle clamp.
20
• Adjust the drilling depth as shown.
-
• Tighten the side handle.
Forward/reverse slider (fig. A)
• To select forward or reverse rotation, use the
forward/reverse-switch (3) (see arrow on tool).
Two gear selector (fig. D)
This tool is fitted with a two gear selector (4) to vary
the speed/torque ratio.
Always use the Drill with the side handle
properly assembled.
Always wait until the motor has come to
a complete standstill before changing the
direction of rotation.
E N G L I S H
9

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