OPERATING 
INSTRUCTIONS
1. CHANGING THE DRILL CHUCK (See A) 
(WX330)
 Removing the replacement drill chuck
Warning: Before removing the 
replacement drill chuck, always 
remove the tool or bit!
With the drill pointing toward you, grasp the 
locking ring (7) of the SDS-plus “quik-change” 
chuck and pull forward firmly, then rotate it to 
the side. The SDS-plus “quik-change” chuck 
will come free.
 Attaching the replacement drill chuck
When mounting the precision keyed chuck, 
grasp the precision keyed chuck with the 
whole hand, pull it back as far as it will go, 
then rotate it to the side until it can clearly 
be heard to latch. The precision keyed chuck 
locks itself. Check locking by pulling on the 
precision keyed chuck. Make replacements in 
a corresponding manner.
2. INSERTING AND REMOVING DRILL 
BIT IN SDS
Take care that the dust protection cap 
(9) is not damaged when changing tools.
 Inserting
Clean and lightly oil the bit before inserting. 
Insert the dust-free bit into the bit holder with 
a twisting motion
The bit locks itself. Check the locking by 
pulling on the tool.
 Removing
Retract back the bit holder locking sleeve (8) 
and pull out the bit.
WARNING! Your new WORX Rotary 
Hammer Drill generates powerful 
forces to get your job done quickly and 
effectively. These forces may cause 
inferior quality SDS bits to break and jam 
in the chuck, We therefore recommend 
that only high quality SDS bits be used 
with this tool.
3. MOUNTING OF BIT IN PRECISION 
KEYED CHUCK (WX330)
Warning: Do not use tools without 
SDS-plus for hammer drilling or 
chiseling!
Before mounting the drill bit, attaching the 
13 mm precision keyed chuck (11), insert bit 
between the chuck jaws as far as it will go. 
Ensure drill bit is in the center of the chuck 
jaws. Using the chuck key provided, there are 
three holes in which the chuck key should be 
inserted. Tighten them equally in turn at each 
of the three holes, not just at one hole. Your 
drill bit is now locked in the chuck. The bit can 
be removed by reversing the above procedure 
(See B ).
4. INSERTING/REPLACING THE DRILL 
CHUCK (See Fig. C)
 Inserting the Drill Chuck
To work with tools without SDS-plus (e.g., 
drills with cylindrical shafts), a suitable drill 
chuck must be used. Insert the adapter (14) of 
the drill chuck (13) with a twisting motion into 
the SDS-plus chuck (12) until it can be heard 
to lock. The adapter locks itself. Check the 
locking by pulling on the drill chuck.
 Removing the Drill Chuck
To remove the drill chuck (13), pull the locking 
sleeve (8) to the rear, hold in this position and 
remove the drill chuck from the tool holder.
5. ON/OFF SWITCH WITH VARIABLE 
SPEED CONTROL
Depress to start and release to stop your tool. 
This tool has a variable speed switch (1) that 
delivers higher speeds with increased trigger 
pressure - speed is controlled by varying the 
pressure applied to the switch (See D)
6. SWITCH LOCK-ON BUTTON
Depress the on/off switch (1) then the lock 
on button (2) (See D); release the on/off 
switch first and the lock-on button second. 
Your switch is now locked on for continuous 
use. To switch off your tool just depress and 
release the on/off switch.
7. AUXILIARY HANDLE
Slide the handle onto the drill and rotate to 
the desired working position. To clamp the 
auxiliary handle rotates the handle clockwise. 
To loosen the auxiliary handle rotate the 
handle anti-clockwise (See E).
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