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Idiomas disponibles
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3.3 Overload protectors
Hilti diamond coring machines are
equipped with mechanical, electronic,
thermal and optical overload protec-
tors.
Slip clutch:
This protects the motor and core bit in
case the core bit suddenly jams.
Electronic protection:
In case of overloading caused by
excessive coring feed pressure, the
motor current is reduced automatically
so that the core bit then only rotates
slowly. On reducing feed the pressure,
the current input returns to normal and
3.4 Instructions and precautions for overhead coring
2
1
3
4
5
7
6
9
8
4. Technical data
Voltage
Current input
Power input
Frequency
Core bit diameter range
No-load speeds:
1st speed: 1200 r.p.m.
2nd speed: 2400 r.p.m.
3rd speed: 3900 r.p.m.
Weight (depending on equipment)
Length of supply cord
Chuck
Electronic idling speed regulator
Overload current regulator
Optical overload indicator
Built-in starting current regulator
Thermal motor protector
Mechanical slip clutch
Protection class 1 (mains supply with earth/ground connection required)
Radio and TV interference suppression as per EN 55014
Reaction in mains supply as per EN 60555, part 2
Approved as per IEC 1029
The noise produced by this equipment has been measured according to IEC 59
CO 11, IEC 704, DIN 45635, part 21, NFS 31-031 (84/537/ EWG)
The noise level under certain working conditions may exceed 85 dB (A), in which
case the operator must wear suitable ear protectors.
This Product is UL listed and CSA certified
4
Printed: 07.07.2013 | Doc-Nr: PUB / 5069606 / 000 / 00
the motor continues to run at full
power.
Protection against overheating:
The motor is protected against over-
heating by a sensor which automati-
cally reduces current input in case of
sustained overloading and at high
ambient temperatures. The machine
can be operated normally after the
temperature of the motor windings
has dropped to a satisfactory level.
The motor windings can be cooled
more quickly by allowing the machine
to run without load.
When coring overhead, the following
equipment must be used for safety
reasons:
1. Drill stand, fastened to the ceiling
using an HDI
1
/
˝ anchor
2
2. Water collector complete with
appropriate sealing disc
3. Hose strain relief clamp
4. Water removal hose
5. Adaptor for wet vacuum cleaner
6. 6 mA GFCI ground fault circuit inter-
ruptor (supplied)
7. Supply cord with earth/ground
conductor
100 V
115 V
15 A
15 A
1400 W
1600 W
50/60 Hz
8 – 82 mm
Speed/core bit diameter range:
1st speed: 37 – 82 mm
2nd speed: 18 – 40 mm
3rd speed: 8 – 24 mm
approx. 13 kg
4 metres
DD-BI quick-release chuck
R
Overload indicator:
The overload indicator lights up when
the motor is being operated at maxi-
mum load. It is recommended that the
machine is operated so that overload
indicator is not lit up continually e.g.
reduce coring pressure.
8. Wet vacuum cleaner.
A vacuum cleaner designed for
removing water and wet materials
must always be used for overhead
coring.
9. 3-way water connection.
Close the water supply valve and
drain the water from the core bit at the
3-way water connection before with-
drawing the core bit from the water
collector.
Note: The life of the sealing discs
can be extended by applying a little
grease e.g. bearing grease or Hilti
lubricant spray.
230 V
8 A
1700 W
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