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With a soft tool shank, retightening may be required
after a short period of operation.
Note: The grating sound that may be heard after the
drill chuck is opened is purely functional; it is
stopped by turning the sleeve in the opposite direc-
tion.
With a soft tool shank, retightening may be required
after a short period of operation.
If the chuck is very securely tightened: Unplug. Hold
drill chuck using an open-end spanner at the flats on
its head, and turn the sleeve (2) vigourously in the
direction of "AUF, RELEASE".
7.9
Metabo VibraTech (MVT)
For reduced vibrations and less stress on the
hands.
Always apply a moderate amount of pressure to the
handle when pushing down the machine and do not
force. Vibrations are reduced most effectively at the
central position (9).
8. Maintenance, cleaning
Ventilation slits:
Clean the ventilation slits on the machine occasion-
ally.
KHE 3251:
- Always keep the spindle (6) clean and apply a
light coating of grease. (Special grease: Order
No.: 6.31800)
- Keyless chuck (1) cleaning:
After prolonged use, hold the chuck vertically, with
the opening facing down, and fully close it and
open it several times. The dust collected falls from
the opening. The application of cleaning spray to
the jaws and jaw openings at regular intervals is
recommended.
f
9. Accessories
Use only genuine Metabo accessories.
Use only accessories which fulfil the requirements
and specifications listed in these operating instruc-
tions.
For a complete range of accessories, see
www.metabo.com or the accessories catalogue.
10. Repairs
Repairs to electrical tools must be carried out by
qualified electricians ONLY!
If you have Metabo electrical tools that require
repairs, please contact your Metabo service centre.
For addresses see www.metabo.com.
You can download spare parts lists from
www.metabo.com.
11. Environmental Protection
Observe national regulations on environmentally
compatible disposal and on the recycling of disused
machines, packaging and accessories.
10
Only for EU countries: Never dispose of
power tools in your household waste! In
accordance with European Guideline 2002/
96/EC on used electronic and electric equipment
and its implementation in national legal systems,
used power tools must be collected separately and
handed in for environmentally compatible recycling.
f
12. Technical Specifications
Explanation of details on page 3. Subject to
changes serving technical progress.
P
=
Rated input
1
P
=
Power output
2
n
=
No-load speed
1
n
=
Load speed
2
ø
=
Maximum drill diameter
max
s
=
Maximum impact rate
max
W
=
Single impact force
S
=
Impact performance
b
=
Drill chuck chucking capacity
m
=
Weight without mains cable
D
=
Collar diameter
Measured values determined in conformity with EN
60745.
Machine in protection class II
~
Alternating current
The technical specifications quoted are subject to
tolerances (in compliance with the relevant valid
standards).
Emission values
Using these values, you can estimate the
emissions from this power tool and compare these
with the values emitted by other power tools. The
actual values may be higher or lower, depending on
the particular application and the condition of the
tool or power tool. In estimating the values, you
should also include work breaks and periods of low
use. Based on the estimated emission values,
specify protective measures for the user - for
example, any organisational steps that must be put
in place.
Vibration total value (vector sum of three directions)
determined in accordance with EN 60745:
a
=
Vibration emission value (hammer
h, HD
drilling into concrete)
a
=
Vibration emission value (chiselling)
h, Cheq
K
= Uncertainty (vibration)
h,HD/Cheq
Typical A-effective perceived sound levels:
L
=
Sound pressure level
pA
L
=
Acoustic power level
WA
K
, K
= Uncertainty
pA
WA
During operation the noise level can exceed
80 dB(A).
Wear ear protectors!
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