ENGLISH
4
more than one extension to make up the total length, 
be sure each individual extension contains at least the 
minimum wire size. The following table shows the correct 
size to use depending on cord length and nameplate 
ampere rating. If in doubt, use the next heavier gauge. The 
lower the gauge number, the heavier thecord.
Minimum Gauge for Cord Sets
Volts
Total Length of Cord in Feet 
(meters)
120 V 25 (7.6) 50 (15.2) 100 (30.5) 150 (45.7)
240 V 50 (15.2) 100 (30.5) 200 (61.0) 300 (91.4)
Ampere Rating
American Wire Gauge
More 
Than
Not 
More 
Than
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12 Not Recommended
The label on your tool may include the following symbols. The 
symbols and their definitions are asfollows:
V .........................  volts
Hz .......................hertz
min ..................... minutes
 or DC ......direct current
 ...................... Class I Construction 
(grounded)
…/min ..............per minute
BPM .................... beats per minute
IPM ..................... impacts per minute
RPM ....................  revolutions  per 
minute
sfpm ................... surface feet per 
minute
SPM .................... strokes per minute
A ......................... amperes
W ........................watts
 or AC ...........alternating current
 or AC/DC .... alternating  or 
direct current
 ...................... Class  II 
Construction 
(double insulated)
n
o
 .......................no load speed
n .........................rated speed
 ......................earthing terminal
 .....................safety alert symbol
 .....................visible radiation
 ..................... wear  respiratory 
protection
 ..................... wear  eye 
protection
 ..................... wear  hearing 
protection
 ..................... read  all 
documentation
SAVE THESE INSTRUCTIONS FOR 
FUTURE USE
Motor
Be sure your power supply agrees with the nameplate 
marking. Voltage decrease of more than 10% will cause loss 
of power and overheating. 
 tools are factory tested; 
if this tool does not operate, check powersupply.
Intended Use
These heavy-duty hammerdrills are designed for 
professional drilling and hammerdrilling. DO NOT use 
under humid conditions or in presence of flammable liquids 
orgases.
NOTICE: Not recommended for mixingapplications.
These heavy-duty hammerdrills are professional power 
tools. DO NOT let children come into contact with the tool. 
Supervision is required when inexperienced operators use 
thistool.
DO NOT use under wet conditions or in presence of 
flammable liquids orgases.
Switch (Fig. B)
To start hammerdrill, depress the trigger switch
1
. To stop 
hammerdrill, release theswitch.
To lock the trigger switch in the ON position for continuous 
operation, depress the trigger switch and push up the 
locking button
2
. The tool will continue torun.
To turn the tool OFF from a locked on condition, squeeze 
and release the trigger once. Before using the tool (each 
time), be sure that the locking button release mechanism is 
workingfreely.
The locking button is for use only when the hammerdrill is 
mounted in a drill press stand or otherwise held stationary. 
Do not lock the switch ON when drilling by hand so that 
you can instantly release the trigger switch if the bit binds in 
the hole. Be sure to release the locking mechanism before 
disconnecting the plug from the power supply. Failure to do 
so will cause the hammerdrill to start immediately the next 
time it is plugged in. Damage or injury couldresult.
Fig. B
3
1
2
Variable Speed Trigger Switch (Fig. B)
The variable speed trigger switch
1
 permits speed control. 
The farther the trigger switch is depressed, the higher the 
speed of thehammerdrill.
NOTE: Use lower speeds for starting holes, drilling in plastics 
or ceramics or drivingscrews.
Reversing Lever (Fig. B)
The reversing lever
3
, located above the trigger switch, 
changes the direction of rotation of the hammerdrill and is 
used when backing out screws and jammed drillbits.
To operate the tool in reverse, release the trigger switch 
and push the lever to the left (when viewed from the 
chuckend).
To operate the drill in forward, release the trigger switch 
and push the lever to the right (when viewed from the 
chuckend).
Return the reversing lever to the forward position after all 
operations in reverse arecompleted.