DeWalt XR DCF891 User Manual

10
ENGLISH
released. The variable speed switch enables you to select the
best speed for a particular application. The more you squeeze
the trigger, the faster the tool will operate. For maximum tool
life, use variable speed only for starting holes orfasteners.
NOTE: Continuous use in variable speed range is not
recommended. It may damage the switch and should
beavoided.
Forward/Reverse Control Button (Fig.A)
A forward/reverse control button
2
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 for ward/re verse control button on the right side of
thetool.
To select reverse, release the trigger switch and depress the
forward/reverse control button on the left side of thetool.
The centre 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.
NOTE: 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.
Worklight (Fig.A, C)
The worklight
6
is activated when the variable speed trigger
1
is depressed. Pressing the worklight switch
15
repeatedly will
cycle through low illumination, high illumination, and off.
NOTE: The worklight is for lighting the immediate work surface
and is not intended to be used as aflashlight.
Mode Selector (Fig.A, C)
Your tool is equipped with a mode selector
7
which allows you
to select one of three speeds or Precision Wrench™ mode. Select
the mode based on the maximum speed/torque needed and
control the speed of the tool using the variable speed trigger
switch
1
.
Precision Wrench™ (Fig. C)
In addition to low speed impacting modes, this tool features
the Precision Wrench™ mode which grants the user greater
control in both fastening and loosening applications. When set
in forward, the tool will fasten at 2000 RPM until impact begins.
The tool will then pause for 0.5 seconds before continuing
to impact at a rate of 3250 IPM, providing the user with
greater control and reducing the chance of overtightening or
damagingmaterial.
When set in reverse, the tool will impact at a normal speed and
rate of 3250 IPM. Upon sensing that the fastener has broken
free, the tool will cease to impact and will reduce speed to help
prevent “run‑off” of loose hardware.
Specifications
Mode Application RPM
Low Mode Normal Impacting 0–600 forward
0–2000 reverse
Medium Mode Medium Impacting 0–1200 forward
0–2000 reverse
High Mode High Speed Impacting 0–2000 forward
0–2000 reverse
Precision Wrench™ Mode Precision Wrench™ 0–2000 forward
0–2000 reverse
Anvil (Fig.A)

WARNING: Use only impact accessories. Non‑impact
accessories may break and cause a hazardous condition.
Inspect accessory prior to use to ensure that it contains
nocracks.

CAUTION: Inspect anvils, detent pins, and hog rings prior
to use. Missing or damaged items should be replaced
beforeuse.
Place the switch in the locked off (centre) position or remove
battery pack before changingaccessories.
Anvil with Detent Pin (Fig.D)
DCF892
To install an accessory on the anvil, align the hole in the side
of the accessory with the detent pin
14
on the anvil
3
. Press
the accessory on until the detent pin engages in the hole.
Depression of detent pin may be necessary to aid installation
ofaccessory.
To remove an accessory, depress the detent pin through the
hole and pull the accessoryoff.
Anvil With Hog Ring (Fig.D)
DCF891
To install an accessory on the hog ring anvil, firmly push
accessory onto the anvil
3
. The hog ring
13
compresses to
allow the accessory to slide on. After accessory is installed, the
hog ring applies pressure to help provide accessoryretention.
To remove an accessory, grasp the accessory and firmly pull
itoff.
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and
applicableregulations.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect battery pack
before making any adjustments or removing/
installing attachments or accessories. An accidental
start‑up can causeinjury.
Proper Hand Position (Fig.E)

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
10
.

DeWalt XR DCF891 Specifications

General

Voltage	20V
Drive Size	1/2 inch
Speed Settings	3
No Load Speed	0-2000 RPM
Battery Type	Lithium-Ion
Power Source	Battery
Impacts Per Minute	0-3100 IPM
Weight	1.7 kg