DD EC-1
DD EC-1
Bedienungsanleitung
de
Operating instructions
en
Mode d’emploi
fr
zh
ja
ko
cn
ar
Printed: 28.11.2013 | Doc-Nr: PUB / 5139981 / 000 / 01
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�
쐋
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DD EC-1
햲
햽 햵 햶
쐎
햻
쐄
햹 햺
햷
쐅 쐏
햸
햳
햴
햿
쐆쐂 햾
쐊
헀
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DD EC-1
5
0
150
300
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DD EC-1
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150
300
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1
2
DD EC-1
DD EC-1
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13
5
0,5mm
3
4
DD EC-1
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DD EC-1
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DD EC-1
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1
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C-1
DD E
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4
5
C-1
DD E
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Pos. 1
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Pos. 2
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DD EC-1
Printed: 28.11.2013 | Doc-Nr: PUB / 5139981 / 000 / 01
ORIGINAL OPERATING INSTRUCTIONS
DD EC-1 diamond core drilling machine
It is essential that the operating
instructions are read before the
tool is operated for the first time.
Always keep these operating
instructions together with the tool.
Ensure that the operating
instructions are with the tool when
it is given to other persons.
General information
In these operating instructions, this symbol indicates points of particular importance to safety. The
instructions at these points must always be observed
in order to avoid risk of serious injury.
Danger: Electricity
Symbols
Read the operating
instructions before use.
Return waste material
for recycling.
 The numbers refer to the illustrations on the fold-out
cover pages (front and rear cover).
Operating controls 
쐃 Chuck operating lever
쐇 Control switch
쐋 Water regulation wheel
쐏 Switch lock for drill stand use
쐄 Keyed supply cord plug connection
(socket for supply cord plug)
쐂 Water collector holder release button
쐆 Slider for water collector holder rod length
adjustment
쐊 Water collector sleeve
쐎 Depth gauge
쐅 Water flow indicator release button
Component parts 
햲 Chuck
햳 Pressure plate
햴 Side handle
햵 Gearing section with TOPSPIN kinematics
햶 Motor
햷 Grip
햸 Water flow indicator
햹 Circular bubble level
햺 Cylindrical bubble level
햻 Type / rating plate
햽 Belt drive cover
햾 Water collector holder rods
햿 Water collector sleeve
헀 Supply cord (with PRCD except for GB version)
쐃 / 햲 The numbers refer to the operating controls /
component parts of the tool.
In these operating instructions, the electric tool to which
these operating instructions apply is referred to as “the
tool”.
Contents
General information
Description
Main features of the tool
Technical data
Intended uses
Insert tools and accessories
Safety rules
Before use
Operation
Care and maintenance
Troubleshooting
Manufacturer's warranty – tools
Disposal
EC declaration of conformity (original)
Page
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Description
Main features of the tool
The DD EC-1 is an electrically-powered diamond core
drilling machine for wet drilling.
– Drilling machine with TOPSPIN kinematics, i.e. deliberate orbital movement of the core bit and chuck
– Class I electrical protection
– Belt drive (uses no oil)
– Mechanical slip clutch
– Electronic motor protection with temperature monitoring
– Rubber-covered grip and side handle
– Chuck system for DD-C core bits (working length of
150 and 300 mm)
– Quick-change core bit connection end system
– Infinitely variable speed control
– Automatic water on / off function
– Manual water volume regulation
– Built-in water flow rate indicator
– Lockable control switch
– Removable water collector holder
– Removable supply cord with keyed socket connector
and PRCD (except for GB version) residual current
device
– Depth gauge
– Bubble levels
Items supplied: The following items are supplied: electric tool, water collector holder including water collector, supply cord equipped with PRCD, operating instructions, lubricant spray (50 ml), cleaning cloth, toolbox.
The following conditions must always be observed
when the tool is in use:
– The tool must be connected to an alternating current
electric mains supply in compliance with the information given on the type plate.
– The tool must not be used in places where the surrounding conditions present a risk of explosion.
– The water collector with the correct sleeve must
always be used.
Technical data
Rated input:
Rated voltage: ✱
Rated current input: ✱
Mains frequency:
Weight as per EPTA-Procedure 01/2003:
Dimensions (L×W×H):
Minimum distance between wall and hole drilled:
Speed:
Max. permitted water supply pressure:
1450 W 1400 W 1400 W 1450 W 1450 W
100 V 110 V 220 V 230 V 240 V
13.4 A 6.7 A 6.7 A 6.7 A
50–60 Hz
6.8 kg
423×108×195 mm
36 mm
9200 r.p.m.
6 bar (If water pressure is higher, a pressure-reducing
valve must be fitted at the jobsite connection.)
Other important features:
Removable supply cord with keyed socket connector
Slip clutch release torque:
13 Nm
Protection class:
As per EN 60745, protection class I (earthed)
✱ The tool is offered in different versions for various mains voltages. Please refer to the information on the
type plate for the nominal voltage and nominal current input of your tool.
NOTE
The vibration emission level given in this information sheet has been measured in accordance with a standardised
test given in EN 60745 and may be used to compare one tool with another. It may be used for a preliminary assessment of exposure. The declared vibration emission level represents the main applications of the tool. However if
the tool is used for different applications, with different accessories or poorly maintained, the vibration emission
may differ. This may significantly increase the exposure level over the total working period. An estimation of the
level of exposure to vibration should also take into account the times when the tool is switched off or when it is
running but not actually doing the job. This may significantly reduce the exposure level over the total working period. Identify additional safety measures to protect the operator from the effects of vibration such as: maintain the
tool and the accessories, keep the hands warm, organisation of work patterns.
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Noise and vibration information (measured in accordance with EN 60745-2-1):
Typical A-weighted noise power level (LwA):
98 dB (A)
Typical A-weighted noise emission pressure level (LpA): 87 dB (A)
For the given sound power level as per EN 60745, the tolerance is 3 dB.
Wear ear protection!
Triaxial vibration information (measured in accordance with 60745-2-1 at the grips and in accordance with
EN 61029 at the lever)
Triaxial vibration values (vibration vector sum) EN 60745-2-1 (hand-held)
Core bit length
150 mm
Vibration ah DD
10 m/s2
Uncertainty K
1.5 m/s2
Core bit length
300 mm
17 m/s2
2 m/s2
Triaxial vibration values (vibration vector sum) EN 61029, RIG DD-CR1(on drill stand)
Core bit length
Core bit length
150 mm
300 mm
Vibration ah DD
7 m/s2
11 m/s2
Uncertainty K
1.5 m/s2
1.5 m/s2
Right of technical changes reserved
Intended uses
The tool is intended for the following uses:
– Drilling holes (diamond core drilling) of 8–35 mm
diameter in reinforced concrete, masonry and natural stone
– To be used exclusively for wet drilling and in conjunction with the water collector and corresponding
water collector sleeves
– The tool must be connected to a mains supply providing a voltage and frequency in compliance with the
information given on the type plate.
– The tool may be used only when connected to a mains
supply equipped with an earth / ground conductor
and of adequate power rating.
– The tool may be used only with a mains supply cord
of the type intended for use with it, equipped with a
keyed socket connector and built-in PRCD (isolating
transformer for GB).
– In accordance with national safety regulations, the
safety function of the earth / ground conductor must
be tested at regular intervals.
– Before use, the PRCD must be tested for correct functionality (see “Operation”).
– Only the core bits and accessories designed for use
with this tool may be used.
The position and dimensions of the holes drilled must
be approved by the design engineer, architect or person
in charge of the building project (building statics).
Do not, under any circumstances, use this product in
any way other than as described in these operating
instructions.
Insert tools and accessories
For safety reasons and for optimum transmission of the
TOPSPIN action, only DD-C core bits may be used with
the DD EC-1. When drilling using special core bits with
a working length of 600 mm, the hole must be pre-drilled
using a shorter core bit and water collector.
The following accessories are available for use with the
DD EC-1:
– DD-REC 1 water recycling unit
– DD-CB core removal tool
– Vacuum cleaner adaptor
– Drill stand DD-CR1
The tool may be handled only as described in these operating instructions (care, maintenance, assembly, use,
etc.). Manipulation of the tool in ways other than as
described in these operating instructions may negatively
affect its functionality.
The safety precautions listed in the operating instructions or, if applicable, on a separate sheet, must be
observed.
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Safety instructions
NOTE
The safety rules in section 1 contain all general safety rules for power tools which, in accordance with the applicable standards, require
to be listed in the operating instructions. Accordingly, some of the
rules listed may not be relevant to this tool.
c)
d)
1. General Power Tool Safety Warnings
WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result
in electric shock, fire and/or serious injury. Save all warnings
and instructions for future reference. The term “power tool”
in the warnings refers to your mains-operated (corded) power
tool or battery-operated (cordless) power tool.
e)
1.1 Work area safety
a) Keep work area clean and well lit. Cluttered or dark areas
invite accidents.
b) Do not operate power tools in explosive atmospheres, such
as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
c) Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
g)
a)
1.2 Electrical safety
a) Power tool plugs must match the outlet. Never modify the
plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching
outlets will reduce risk of electric shock.
b) Avoid body contact with earthed or grounded surfaces,
such as pipes, radiators, ranges and refrigerators. There is
an increased risk of electric shock if your body is earthed or
grounded.
c) Do not expose power tools to rain or wet conditions. Water
entering a power tool will increase the risk of electric shock.
d) Do not abuse the cord. Never use the cord for carrying,
pulling or unplugging the power tool. Keep cord away from
heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
e) When operating a power tool outdoors, use an extension
cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
f) If operating a power tool in a damp location is unavoidable,
use a residual current device (RCD) protected supply. Use
of an RCD reduces the risk of electric shock.
1.3 Personal safety
a) Stay alert, watch what you are doing and use common sense
when operating a power tool. Do not use a power tool while
you are tired or under the influence of drugs, alcohol or
medication. A moment of inattention while operating power tools
may result in serious personal injury.
b) Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, non-skid safe-
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f)
ty shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.
Prevent unintentional starting. Ensure the switch is in the
off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power
tools with your finger on the switch or energising power tools
that have the switch on invites accidents.
Remove any adjusting key or wrench before turning the
power tool on. A wrench or a key left attached to a rotating part
of the power tool may result in personal injury.
Do not overreach. Keep proper footing and balance at all
times. This enables better control of the power tool in unexpected situations.
Dress properly. Do not wear loose clothing or jewellery.
Keep your hair, clothing and gloves away from moving parts.
Loose clothes, jewellery or long hair can be caught in moving
parts.
If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected
and properly used. Use of dust collection can reduce dustrelated hazards.
1.4 Power tool use and care
a) Do not force the power tool. Use the correct power tool for
your application. The correct power tool will do the job better
and safer at the rate for which it was designed.
b) Do not use the power tool if the switch does not turn it on
and off. Any power tool that cannot be controlled with the switch
is dangerous and must be repaired.
c) Disconnect the plug from the power source and/or the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools. Such
preventive safety measures reduce the risk of starting the power tool accidentally.
d) Store idle power tools out of the reach of children and do
not allow persons unfamiliar with the power tool or these
instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
e) Maintain power tools. Check for misalignment or binding
of moving parts, breakage of parts and any other condition
that may affect the power tool’s operation. If damaged, have
the power tool repaired before use. Many accidents are caused
by poorly maintained power tools.
f) Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are
easier to control.
g) Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result
in a hazardous situation.
1.5 Service
a) Have your power tool serviced by a qualified repair person
using only identical replacement parts. This will ensure that
the safety of the power tool is maintained.
2. Additional safety precautions
2.1 Safety instructions for electric drills
a) Use auxiliary handles supplied with the tool. Loss of
control can cause personal injury.
b) Hold power tool by insulated gripping surfaces, when
performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool "live" and could give
the operator an electric shock.
2.1 Personal safety
a) Wear ear protectors. Exposure to noise can cause hearing loss.
b) Power tool plugs must match the outlet. Never modify the
plug in any way. Do not use any adapter plugs with earthed
(grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
c) Avoid body contact with earthed or grounded surfaces,
such as pipes, radiators, ranges and refrigerators. There is
an increased risk of electric shock if your body is earthed or grounded.
d) Do not expose power tools to rain or wet conditions. Water
entering a power tool will increase the risk of electric shock.
e) Ensure that the side handle is fitted correctly and
tightened securely. Always hold the tool in both
hands when it is in use.
f) To avoid tripping and falling when working, always
lead the sypply cord, extension cord and dust extraction hose away tho the rear.
g)The tool is not intended for use by children, by debilitated persons or those who have received no instruction or training.
h)Children must be instructed not to play with the tool.
i) Dust from material such as paint containing lead, some
wood species, minerals and metal may be harmful.
Contact with or inhalation of the dust may cause allergic reactions and/or respiratory diseases to the operator or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and beech dust especially in conjunction with additives for wood conditioning (chromate, wood preservative). Material containing asbestos must only be treated by specialists.
Where the use of a dust extraction device is possible it shall be used. To achieve a high level of dust
collection, use a suitable vacuum cleaner of the type
recommended by Hilti for wood dust and/or mineral dust together with this tool. Ensure that the workplace is well ventilated. The use of a dust mask of
filter class P2 is recommended. Follow national
requirements for the materials you want to work with.
j) Exercise your fingers during pauses between work
to improve the blood circulation in your fingers.
b) In the event of a power faillure, switch the tool off
and unplug the supply cord. This prevents inadvertent starting when the power returns.
2.3 Electrical safety
a) Before beginning work, check the working area
(e.g. with a metal detector) to ensure that no concealed electric cables or gas and water pipes are
present. External metal parts of the tool may become
live if, for example, an electric cable is damaged
inadvertenly. This presents a serious risk of electric
shock.
b) Check the condition of the supply cord and its plug
connections and have it replaced by a qualified
electrician if damage is found. Check the condition of the extension cord and replace it if damage is found. Do not touch the supply in the event
of it suffering damage while working. Disconnect
the supply cord plug from the socket. Damaged
supply cords and extension cords present a risk of
electric shock.
c) Dirty or dusty electric tools should thus be checked
at a Hilti service center at regular intervals, especially if used frequently for working on conductive
materials. Dust (especially dust from conductive
materials) or dampness adhering to the surface of
the tool may, under unfavorable conditions, present
a risk of electric shock.
d) Check that the pins of the plug and supply cord are
clean and dry before they are connected. Unplug
the supply cord form the mains socket before cleaning.
2.4 Work area
a) Ensure that the workplace is well lit.
b) Ensure that the workplace is well ventilated. Poorly ventilated workplaces may be injurious to the health
due to exposeure to dust.
2.5 Personal protective equipment
The user and any other persons in the vicinity must
wear suitable eye protection, a hard hat, ear protection
and protective gloves when the tool is in use.
Wear eye
protection
Wear a
hard hat
Wear ear
protection
Wear
protective
gloves
2.2 Power tool use and care
a) Ensure that the insert tools used are equipped with
the appropriate connection end system and that
they are properly fitted and secured in the chuck.
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Before use
It is essential that the safety precautions printed in these operating instructions are read
and observed.
The tool may be used for drilling work only by
trained personnel.
The mains voltage must correspond to the information on the type plate.
If extension cables are used: Only extension cables
of a type approved for the intended use and of adequate cross section may be used. Failure to observe this
point may result in reduced performance and could cause
the cable to overheat. Damaged extension cables must
be replaced.
The recommended cable cross-sections and maximum lengths are:
Conductor cross-section
Mains voltage 1.5 mm2 2.0 mm2 2.5 mm2 3.5 mm2
100 V
20 m
40 m
110–120 V
20 m
40 m
220–230 V
50 m
80 m
Before beginning drilling, ensure that the necessary safety precautions are taken to prevent
injury or damage caused by falling cores or
water escaping from the hole into rooms or areas below
where the holes are being drilled.
Drilling through reinforcing bars
Obtain permission form the
architect or site engineer
before drilling through reinforcing bars. Drilling through
steel is indicated by slow progress and clear water at
the core bit.
Before using the tool, ensure that the chuck is
clean and the core bit to be used is not damaged
(e.g.the core bit must not wobble or run out of true
when the chuck lever is closed). Worn or broken parts
on the electric tool or core bit must be replaced immediately.
When drilling overhead, for safety reasons,
the following items of equipment must be
used:
1. Water collector assembly with suitable water collector sleeve
2. DD-REC1 water recycling system, or
3. A suitable wet-type vacuum cleaner with the correct adaptor for the water collector hose
4. PRCD portable residual current device (integrated
in the supply cord, isolating transformer for GB))
The grip of the tool must not be used for attaching lifting equipment (e.g. block and tackle, crane,
etc.).
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Use only DD-C core bits.
Do not apply excessive pressure when drilling. This will
not increase drilling performance.
Only pure water, without additives, may be used for cooling and flushing when drilling. Use of the liquids listed
in the DD-REC1 operating instructions is permissible
when the DD-REC1 water recycling unit is used. The corresponding information must be observed.
When setting anchors, the applicable product and
test / inspection regulations must be observed.
Operation
Assembling the tool
– Take the tool out of the toolbox.
– Slide the water collector rods into the openings provided on the front side of the tool as far as they will
go .
– As you do so, keep button 쐂 depressed and engage
the water collector in position on the gear housing by
releasing the button when the rods have been fully
inserted .
– Slide the button 쐆 to the right to adjust the water collector to the length corresponding to the core bit used
(position 1 < 150 mm working length; position 2 :
300 mm working length)  .
– Always use the supplied water collector system.
– Always ensure that the diameter of the water collector sleeve used corresponds to the nominal diameter
of the core bit used.
– Always screw the side handle and depth gauge into
one of the threaded bushings provided on the gear
housing .
–
Ensure that the supply cord is not plugged
in.
Inserting the core bit
-DANGERDo not use damaged core bits. Check the core bits for
chipping, cracks, or heavy wear each time before use.
Do not use damaged tools. Fragments of the workpiece or a broken core bit may be ejected and cause injury
beyond the immediate area of operation.
-NOTEDiamond core bits must be replaced when the cutting
performance and/or rate of drilling progress drops significantly. This generally is the case when the segments
reach a height of less than 2 mm.
– Open the chuck by lifting the operating lever 쐃 30°
upwards .
– Check that the core bit connection end and the chuck
are clean and undamaged.
– Check that the slots in the cutting edge of the core bit
to be used still have a depth of at least 0.5 mm. If not,
–
–
–
–
–
–
the core bit should be replaced as there is otherwise
a risk of it becoming stuck in the hole .
Pivot the water collector about its mounting axis as
far as it will go.
From above, insert the cutting edge of the core bit
into the water collector sleeve .
Guide the connection end of the core bit into the recess
in the chuck.
Rotate the core bit in a clockwise direction while pressing it into the chuck as far as it will go .
Return the chuck operating lever 쐃 to its original
position.
Ensure that the core bit is securely engaged
in the chuck.
Connecting the supply cord and the water supply hose
Check that the detachable electric plug connector is clean and dry before it is connected to the tool. The mains plug must be disconnected
from the mains supply before cleaning the keyed plug
on the supply cord.
– Take the supply cord out of the toolbox 헀.
– Align the mark on the plug with the mark on the socket on the underside of the tool .
– While in this position, insert the plug into the socket
as far as it will go.
– Rotate the keyed plug in a clockwise direction, while
applying slight pressure, until it is heard to engage.
– Use a suitable coupling to connect the water supply
hose .
– Connect the supply cord to the mains socket.
– Switch on the PRCD by pressing the black button .
– Before operating the tool, check the PRCD safety function by pressing the test button. The test is OK when
the test LED extinguishes.
-DANGERIf the indicator continues to light, further operation of
the machine ist not permissible. Have the machine repaired by a qualified specialist using genuine Hilti spare parts.
– After the test, switch on the PRCD again by pressing
the ON button.
After use
1. Disconnect the mains plug.
2. Release the hose connectors to the diamond core
drilling machine. If the DD REC-1 is used, connect the
extraction hose and water supply hose connectors
together. If an external water supply system is used,
prevent water entering the interior of the tool by ensuring that hose couplings of the automatic cut-off type
are fitted and that the water supply valve is turned off.
3. Release the keyed plug from the diamond drilling
machine. To do this, pull on the ring and turn the plug
in a counterclockwise direction, as far ar ist will go,
and then pull it out.
Drilling
The water flow can be controlled in one of two ways:
1. Automatic control (preferred) 
When the water regulation wheel is in position 1, the
water supply is controlled (started and stopped) automatically by the control switch on the tool. The water
flow rate can be adjusted manually by turning the water
regulation wheel (minimum water flow rate: approx.
0.5 l/min.).
2. Bypass mode 
When the water regulation wheel is pulled into position
2, the water flow rate can be adjusted manually between
0 l/min. and approx. 3.0 l/min. by turning the wheel. This
operating mode is used for special applications.
– Before beginning drilling, adjust the water regulation
wheel to the middle position of its range 1–3.
– Carefully bring the water collector into contact with
the surface where the hole is to be drilled.
– The core bit can be exactly positioned by bringing the
centring marks on the water collector into alignment
with a cross marked at the position where the hole is
to be drilled .
– To begin drilling, press the control switch � before
the core bit has been brought into contact with the
base material.
– Begin drilling the hole only when the water flow indicator shows that water is flowing through the core bit
.
– Press the core bit gently against the base material.
– Take care to ensure that the core bit is perpendicular
to the base material.
The pressure applied to the core bit should be regulated so that the tool continues to run at its highest speed.
Application of higher pressure does not increase the rate
of drilling progress.
– Hold the tool straight. Do not tilt it at angle as this may
result in reduced drilling performance. Always ensure
that the tool continues to run at a high speed.
– Immediately after beginning drilling, check the water
flow rate indicator to ensure that water is flowing
(water flow rate is within the optimum range when
the red and white segments of the rotating wheel are
still individually discernible).
Always keep an eye on the water flow rate indicator while drilling. Insufficient water may cause the
core bit to stick in the hole, resulting in damage to the
core bit. It may be necessary to adjust the water flow
rate manually while drilling by turning the water regulation wheel �.
– Switch off the tool after reaching the desired drilling
depth or when the hole has been drilled right through
and, at the same time, pull the core bit out of the hole.
– When drilling in bypass mode, bring the water regulation wheel (3) back to the zero position.
– The water collector should be lifted away from the base
material only when the core bit has stopped rotating.
If the water collector is lifted away from the base
material while the core bit is still rotating, there is
a risk of injury as the core may be thrown out of the bit.
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Additional instructions for drilling using the DD-REC1
water recycling unit
– Read and observe the information printed in the
DD-REC1 operating instructions.
– When the water recycling unit is used, it must be
ensured that the DD-REC1 is in stand-by mode (turn
the main switch). This mode is indicated by a green
LED (see DD-REC1 operating instructions).
– When in stand-by mode, the DD-REC1 begins to operate when the control switch � on the DD EC-1 is
pressed.
– The water recycling unit continues to run for a few
seconds after switching off the DD EC-1. Keep the
water collector pressed against the base material during this time so that any remaining water can be
removed from the hole or core bit.
Removing the core bit
Ensure that the supply cord is not plugged
in.
Care must be taken when removing the core bit as
it may be hot, particularly at the cutting edge. Care
must also be taken to ensure that the core does not fall
out of the core bit unexpectedly.
– To open the chuck, move the lever 쐃 as far at it will
go.
– Hold the tool with the tip of the core bit pointing slightly downwards .
– Rotate the core bit counter-clockwise approx. 60°.
– Pull the core bit out of the chuck away from the tool
.
– Lift the connection end upwards slightly and pull the
core bit out of the water collector towards the rear
.
Removing the core from the core bit
Note
– After drilling a hole vertically upwards, the water
remaining in the core bit must be emptied by tipping
the front end of the core bit down.
– Remove the core bit from the chuck.
– Hold the core bit securely and shake it until the core
falls out through the connection end to the rear.
Should parts of the core remain stuck in the core
bit, tap the connection end gently against a soft surface (wood, plastic) while holding it in a vertical position. Alternatively, use a thin rod to push out the
core.
Before re-inserting the core bit in the tool, ensure
that all pieces of the core have been removed from
the core bit and from the chuck. Pieces of the core falling
out of the core bit while drilling could cause injury.
Removing the core from the hole
– Take the core removal tool (optional accessory) out
of the toolbox.
– Ensure that the diameter of the core removal tool corresponds to the diameter of the core bit used.
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– Push the core removal tool into the hole as far as it
will go while rotating it slightly.
– Break the core by applying slight lateral pressure to
the core removal tool.
– Use the core removal tool to pull the broken core out
of the hole.
– Turn the core removal tool through 180° and re-insert
it in the hole.
– Use a rule to measure the effective hole depth reached.
– Repeat this procedure, if necessary, several times
until the entire core has been removed.
Removing the water flow sight glass
– Slide the water flow sight glass release button towards
the chuck.
– Lift the water flow sight glass away in an upwards
direction.
– Remove the water flow indicator wheel and axle.
– Remove any dirt or fragments.
Check the sight glass seal for damage and replace it
if necessary.
Removing the water flow filter 
– Use a suitable tool to unscrew the water supply connector from the housing of the tool.
– Use pliers to carefully remove the filter.
– Check the seal for damage and replace it if necessary.
– When reassembling, check that the seal and the filter are seated correctly.
Procedure in the event of the core bit sticking
The slip clutch will be activated if the core bit sticks. The
power tool must then be switched off by the operator.
To release the core bit, proceed as follows:
Using an open-end wrench to release the core bit
1. Disconnect the supply cord plug from the power outlet.
2. Grip the core bit close to the connection end with a
suitable open-end wrench and rotate the core bit to
release it.
3. Plug the supply cord back into the power outlet.
4. Continue the drilling operation.
Using the spider wheel to release the core bit (for use
with the drill stand)
1. Disconnect the supply cord plug from the power outlet.
2. Release the core bit by rotating it with the spider wheel.
3. Plug the supply cord back into the power outlet.
4. Continue the drilling operation.
Transport and storage
Note
Store and transport the power tool in is toolbox when
possible.
Open the water flow regulator before storing the power
tool. Especially at temperatures below freezing, take care
to ensure that no water remains in the power tool.
Care and maintenance
Ensure that the supply cord is not plugged
in.
Care
The motor housing, the grip moulding and the belt drive cover are made of impact-resistant plastic. The gear
housing is made of magnesium alloy. The grip cover,
the side handle cover and supply cord sleeve are made
of an elastomer material.
CAUTION
Keep the power tool, especially its grip surfaces, clean
and free from oil and grease. Do not use cleaning agents
which contain silicone.
The outer casing of the tool is made from impactresistant plastic. Sections of the grip are made from a
synthetic rubber material. Never operate the tool when
the ventilation slots are blocked. Clean the ventilation
slots carefully using a dry brush. Do not permit foreign objects to enter the interior of the tool. Clean the
outside of the tool at regular intervals with a slightly
damp cloth. Do not use a spray, steam pressure cleaning equipment or running water for cleaning. This may
negatively affect the electrical safety of the tool.
Clean the chuck frequently with a cloth and lubricate it
at regular intervals with Hilti grease. Remove any dirt
and fragments from the chuck.
Your core bits must also be cared for. Remove any dirt
adhering to their surfaces and protect the surfaces from
corrosion by rubbing the core bits at regular intervals
with an oily cloth. Always keep the connection end clean
and slightly greased.
Remove the filter from the water supply connection on
the tool and flush the filter gauze with water against the
normal flow direction.
If the water flow indicator has become dirty, remove the
parts and clean them with a damp cloth. Do not use abrasive agents or sharp objects to clean the sight glass.
This may negatively affect functionality of the water flow
indicator.
Maintenance
Check all external parts of the tool for damage at
regular intervals and check that all operating controls function faultlessly. Do not operate the tool when
parts are damaged or when operating controls do not
function faultlessly. The tool should be repaired at a Hilti
service centre.
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Troubleshooting
Fault
Machine doesn't start
Possible cause
Fault in mains supply
Supply cord or plug defective
Switch defective
Motor runs but the core bit
doesn't rotate.
Rate of drilling progress
decreases
Gearing defective
Water pressure/water flow rate
too high
Core bit connection end dirty
or not properly engaged
Core bit defective
Gearing defective
Core bit cutting edge polished
The motor cuts out.
Motor is stalled
Machine is too warm. Thermal
(overheating) cutout is
activated.
Electronics defective
Cooling fan defective
No flow of water when
operated in automatic mode
Filter or water flow indicator
blocked
Magnet valve defective
No flow of water when
operated in bypass mode
Water leaks from the gear
housing
The core bit cannot be inserted
in the chuck
Filter or water flow indicator
blocked
Water swivel shaft seal defective
Water leaks from the chuck
Chuck operating lever not fully
open
Core bit connection end or
chuck dirty or damaged
Core bit connection end or
chuck dirty
Chuck seal defective
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Solution
Plug in another electric appliance and
check whether it works.
The cord should be checked and replaced
if necessary by an electrical specialist.
The switch should be checked and replaced if necessary by an electrical specialist.
The machine should be repaired at a Hilti
service centre.
Reduce the water flow rate by turning the
regulating wheel.
Clean the connection end and insert the
core bit correctly.
Check the core bit for damage and replace
it if necessary.
The machine should be repaired at a Hilti
service centre.
Resharpen the core bit on a sharpening
plate (flush with water).
Guide the machine straight.
Ease the load on the machine and press
the switch several times to allow it to run
up to speed again.
The machine should be repaired at a Hilti
service centre.
The machine should be repaired at a Hilti
service centre.
Remove the filter or water flow indicator
and flush it through.
Drill in bypass mode.
The machine should be repaired at a Hilti
service centre.
Remove the filter or water flow indicator
and flush it through.
The machine should be repaired at a Hilti
service centre.
Open the lever as far as it will go.
Clean the connection end and chuck or
replace if necessary.
Clean the connection end and chuck.
Check the seal and replace it if necessary.
Manufacturer's warranty – tools
Hilti warrants that the tool supplied is free of defects in
material and workmanship. This warranty is valid so
long as the tool is operated and handled correctly, cleaned
and serviced properly and in accordance with the Hilti
Operating Instructions, and the technical system is maintained. This means that only original Hilti consumables,
components and spare parts may be used in the tool.
This warranty provides the free-of-charge repair or
replacement of defective parts only over the entire lifespan of the tool. Parts requiring repair or replacement as
a result of normal wear and tear are not covered by this
warranty.
Additional claims are excluded, unless stringent national rules prohibit such exclusion. In particular, Hilti is
not obligated for direct, indirect, incidental or consequential damages, losses or expenses in connection
with, or by reason of, the use of, or inability to use the
tool for any purpose. Implied warranties of merchantability or fitness for a particular purpose are
specifically excluded.
For repair or replacement, send tool or related parts
immediately upon discovery of the defect to the address
of the local Hilti marketing organization provided.
This constitutes Hilti's entire obligation with regard to
warranty and supersedes all prior or contemporaneous
comments and oral or written agreements concerning
warranties.
Disposal
Most of the materials from which Hilti power
tools are manufactured can be recycled. The
materials must be correctly separated before
they can be recycled. In many countries, Hilti has already
made arrangements for taking back your old electric tools
for recycling. Please ask your Hilti customer service
department or Hilti sales representative for further information.
Handling drilling and sawing slurry
Working with diamond tools on mineral materials (e.g.
concrete) in a wet process produces drilling or sawing
slurry. As with fresh cement mortar, it may cause irritation if allowed to come into contact with the skin or eyes.
Wear protective clothing, protective gloves and goggles.
With regard to environmental aspects, allowing these
slurries to flow directly into rivers, lakes or the sewerage system without suitable pre-treatment is problematical.
Disposal procedure
In addition to the following recommended pre-treatment
procedures, the applicable national regulations must be
observed when disposing of drilling or sawing slurry.
Ask the local authorities concerned for further information.
Recommended pre-treatment
■ Collect the drilling or sawing slurry (e.g. using a suitable industrial vacuum cleaner).
■ The fine content of the drilling or sawing slurry should
be separated from the water by allowing it to settle
(e.g. leave standing for some time or add a coagulation agent).
■ Solid material from the drilling or sawing slurry
should be deposited at a construction waste disposal site.
■ Water from the drilling or sawing slurry should be
neutralised (e.g. by adding a large quantity of water
or other neutralisation agents) before it is allowed to
flow into the sewerage system.
Only for EU countries
Disposal of electric tools together with household waste
is not permissible!
In observance of European Directive on waste electrical
and electronic equipment and its implementation in
accordance with national law, electric tools that have
reached the end of their life must be collected separately
and returned to an environmentally compatible recycling
facility.
EC declaration of conformity (original)
Designation:
Diamond core drilling machine
Type:
DD EC-1
Year of design:
2000
We declare, under our sole responsibility, that this
product complies with the following directives and
standards: 2006/42/EC, 2004/108/EC, EN 60745-1, EN
60745-2-1, EN ISO 12100, 2011/65/EU.
Hilti Corporation, Feldkircherstrasse 100,
FL-9494 Schaan
Paolo Luccini
Head of BA Quality & Process Management
BA Electric Tools & Accessories
01/2012
Johannes W. Huber
Senior Vice President
Business Unit Diamond
01/2012
Technical documentation filed at:
Hilti Entwicklungsgesellschaft mbH,
Zulassung Elektrowerkzeuge
Hiltistrasse 6
86916 Kaufering
Deutschland
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Printed: 28.11.2013 | Doc-Nr: PUB / 5139981 / 000 / 01
Hilti Corporation
Printed: 28.11.2013 | Doc-Nr: PUB / 5139981 / 000 / 01
337336 / A3
337336
Hilti = registered trademark of Hilti Corp., Schaan
W 2518 | 1013 | 10-Pos. 4 | 1
Printed in Liechtenstein © 2013
Right of technical and programme changes reserved S. E. & O.
*337336*
LI-9494 Schaan
Tel.: +423 / 234 21 11
Fax:+423 / 234 29 65
www.hilti.com
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