DeWalt DCF815 Original Instructions Manual page 12

ENGLISH
WARNING: To reduce the risk
of serious personal injury, place
the forward/reverse button in
the lock-off position or turn tool
off and disconnect battery pack
before making any adjustments or
removing/installing attachments or
accessories.
Proper Hand Position (fi g. 1, 6)
WARNING: To reduce the risk of
serious personal injury, ALWAYS use
proper hand position as shown.
WARNING: To reduce the risk of
serious personal injury, ALWAYS hold
securely in anticipation of a sudden
reaction.
Proper hand position requires one hand on the main
handle (h).
Variable Speed Trigger Switch (fi g. 1)
To turn the tool on, squeeze the trigger switch (a). To
turn the tool off, release the trigger switch. Your tool
is equipped with a brake. The chuck will stop when
the trigger switch is fully released.
The variable speed switch enables you to start
the application at a slow speed. The further you
squeeze the trigger, the faster the tool will operate.
For maximum tool life, use variable speed only for
starting holes or fasteners.
Continuous use in variable speed range is
not recommended. It may damage the switch and
should be avoided.
Forward/Reverse Control Button
(fi g. 1)
A forward/reverse control button (b) determines the
direction of the tool and also serves as a lock-off
button.
To select forward rotation, release the trigger switch
and depress the forward/reverse control button on
the right side of the tool.
To select reverse, depress the forward/reverse
control button on the left side of the tool. The center
position of the control button locks the tool in the off
position. When changing the position of the control
button, be sure the trigger is released.
The first time the tool is run after changing the
direction of rotation, you may hear a click on start up.
This is normal and does not indicate a problem.
Worklights (fi g. 1)
There are three worklights (g) located around the
chuck collar (c). The worklights will be activated
when the trigger switch is squeezed.
10
The worklights are for lighting the immediate
work surface and are not intended to be used as a
flashlight.
Quick-Release Chuck (Fig. 1, 4)
The chuck accepts 1/4" (6.35 mm) hex
accessories and 1" (25.4 mm) bit tips only. Using 1"
(25.4 mm) bits allows better access in tight spaces.
Place the forward/reverse button (b) in the locked
off (center) position or remove battery pack before
changing accessories.
insert into chuck. The chuck collar does not need to
be pulled up to lock accessory in place.
away from the front of the tool. Remove the
accessory and release the collar.
Usage
Your impact tool generates the following output
torque:
DCF815 79
CAUTION: Ensure fastener and/or
system will withstand the level of torque
generated by the tool. Excessive torque
may cause breakage and possible
personal injury.
1. Place the socket on the fastener head. Keep
the tool pointed straight at the fastener.
2. Press switch to start operation. Always check
torque with a torque wrench, as the fastening
torque is affected by many factors including the
following:
Voltage: Low voltage, due to a nearly
discharged battery, will reduce fastening
torque.
Socket size: Failure to use the correct
socket size will cause a reduction in fastening
torque.
Bolt Size: Larger bolt diameters generally
require higher fastening torque. Fastening
torque will also vary according to length,
grade, and torque coefficient.
Bolt: Ensure that all threads are free of rust
and other debris to allow proper fastening
torque.
Material: The type of material and surface
finish of the material will affect fastening
torque.
Fastening Time: Longer fasten ing time
results in increased fastening torque. Using
a longer fastening time than recom mended
could cause the fasteners to be overstressed,
stripped or damaged.
, push accessory to fully
, pull the chuck collar
950 107