ity. The fast speed (position 2) is adjusted for percussion
drilling and normal small-hole drilling up to a drill bit di-
ameter of approximately 8 mm. The slow speed (posi-
tion 1) is adjusted for larger drill bit diameters and for stir-
ring applications.
The safety slippling clutch
The slipping clutch begins to operate as soon as the drill or
the tool being driven is overloaded, violently braked or
jammed. The motor and transmission continue to rotate,
but the tool is no longer driven. This protects the driveline
against overloads and avoids damage to the gear teeth
caused by violent shocks.
Quick change chuck
This chuck was developed especially for use with per-
cussion drills. The chuck has a release safety lock which
prevents any unintensional release of drilling tool even
at high impact frequencies. Operation is by turning collar
as usual to stop point. Engagement of clamping force
safety lock for subsequent operation is clearly heard and
felt.
Clamping and releasing of chuck by holding the locking
ring.
Use as a screwdriver
Screwdriver inserts (bits) can fitted directly into the chuck.
Use Phillips screws for best results. Safe operation is en-
sured by the self-centering mechanism. Please make sure
to use the correct screwdriver inserts.
Cutting threads
The integrated electronic and the reversal of the direction
of rotation makes the percussion drill also suitable for cut-
ting threads. The use of machine taps is recommended.
The tap is clamped into the chuck.
The electronic controls are sensitive and should be
handled with utmost care to prevent any breaking of tap –
particularly when cutting threads into blind holes.
The required torque may be selected via the adjusting
wheel in switch (1).
Important! When cutting threads, use low speeds only.
Important note for machines with clockwise and anti-
clockwise rotation.
Chuck
The chuck is tightened with a turning moment of 30 Nm.
Only this guarantees that the chuck is not unintentionally
unwound from the drill spindle in anticlockwise mode.
Should the chuck be undone from the drill spindle for the
purpose of replacement, the new chuck must be tightened
with a turning moment of at least 30 Nm before the ma-
chine is used again.
The plane surfaces of the chuck and drill spindle must be
cleaned before a new chuck is mounted.
Caution!
Before disassembling and reassembling the drill chuck,
disconnect the machine from the power supply, or re-
move the mains cable module (6) from the grip using
the locking device button (7).
Caution!
When turning anticlockwise, it is possible that the
chuck loosens itself from the spindle. For this reason
make sure that the chuck sits properly on the spindle.
Always make sure that the chosen speed is correct for
the purpose for which you are using the machine.
High speeds are necessary for polishing and grinding.
When drilling match speed with type of material and drill.
High speed drilling in steel and stone will cause premature
tool wear.
Use tool steel twist drills for soft materials such as wood
and plastics; carbide-tipped stone drills for stone and con-
crete; high speed twist drills for steel and iron.
Also make sure that, using a gear-rim chuck, the drill
chuck key is never fastened to the drill with chains,
strings or by similar means. Be sure that the workpiece
cannot be taken along by the drill.
Maintenance
The machine's motor has life-time lubrication and requires
no special maintenance. However, should you operate the
machine on a continuous basis over long periods of time
we recommend that you send us the machine for thorough
cleaning and an inspection. This will spare you unnecess-
ary repair expenses and increase the machine's service
life. If you always clean the ventilator of dust after each
operation, the motor will enjoy an ever longer service life.
Uniform ventilation is essential for a long service life.
Replacing carbon brushes
Our service personnel will do this and all other servicing
work fast and professionally.
Mains cable
Damaged mains cables must not be used. They are to be
replaced immediately.
Thanks to the innovative mains cable with patent quick-
release lock (6) it is possible for you to replace the cable
with the greatest of ease. Press the two lock pushbuttons
(7) and pull the mains cable out of the casing (6). Feed the
new mains cable into the hand grip until it snaps in place.
Various cable lengths are available upon request.
Only use the mains cable module for KRESS power
tools! Do not attempt to operate other electrical ap-
pliances with it!
Auxiliary handle
For safety reasons the side handle should always be used
when working with the percussion drill. It guarantees safe,
wander-free guidance of the drill, and at the same time
precise adjustment of the drilling depth with the depth
stop.
Tighten the draw spindle on the auxiliary handle properly.
This is the only way to ensure that the auxiliary handle
cannot turn on the collar or come off the appliance.
Standard accessories
Side handle with depth stop
Noise/vibration information
Measured values correspond with EN 50144.
Sound pressure level: 78
+
3
dB (A)
Sound power level: 91
+
3
dB (A)
Work place emission value: 81
+
3
dB (A)
Operators require noise protection equipment.
The weighted acceleration is typically 15.6 m/s
2
.
We reserve the right to make alterations resulting from
technical development without prior notice.
Environmental protection
Kress takes back used machines for resource saving recy-
cling. Due to their modular construction Kress machines
can be very easily broken down into their recyclable basic
materials. Hand in your old Kress machine at a dealer or
send them directly to Kress.
