Hilti DD 350 User manual

DD 350/
DD 500
Bedienungsanleitung de
Operating instructions en
Mode d’emploi fr
Istruzioni d’uso it
Gebruiksaanwijzing nl
Manual de instruções pt
Manual de instrucciones es
Brugsanvisning da
Käyttöohje fi
Bruksanvisning no
Bruksanvisning sv
Οδηγιες χρησεως el
Ръководство за обслужване bg
Upute za uporabu hr
Instrukcja obsługi pl
Инструкция по зксплуатации ru
Návod na obsluhu sk
Navodila za uporabo sl
Návod k obsluze cs
Használati utasítás hu
Kasutusjuhend et
Lietošanas pamācība lv
Instrukcija lt
zh
ja
ko
ar
cn
Пайдалану бойынша басшылықkk
Kulllanma Talimatı tr
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4Ω
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21Ω
4Ω
4
4
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11
13
15
17
6
6
710
8
mmO
"O
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15
600
450
400
350
300
250
225
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122
112
102
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4Ω
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It is essential that the operating instructions
are read before the machine is operated for
the first time.
Always keep these operating instructions
together with the machine.
Ensure that the operating instructions are
with the machine when it is given to other
persons.
ORIGINAL OPERATING INSTRUCTIONS
DD 350/DD 500 diamond core drilling system
1. General information
1.1 Safety notices and their meaning
-DANGER-
Draws attention to imminent danger that will lead to seri-
ous bodily injury or fatality.
-WARNING-
Draws attention to a potentially dangerous situation that
could lead to serious personal injury or fatality.
-CAUTION-
Draws attention to a potentially dangerous situation that
could lead to slight personal injury or damage to the
equipment or other property.
-NOTE-
Draws attention to an instruction or other useful infor-
mation.
Contents Page
1. General information 21
2. Description 23
3. Accessories 24
4. Technical data 25
5. Safety precautions 27
6. Before use 29
7. Operation 33
8. Care and maintenance 35
9. Troubleshooting 36
10. Disposal 38
11. Manufacturer's warranty – tools 39
12. EC declaration of conformity (original) 39
Operating controls, parts and indicators
Machine (machine and drill stand) 
Machine
@Service indicator
;Iron Boost button
=OFF switch
%Drilling performance indicator (Power Controls)
&ON switch
(Temperature monitor/ground fault
)Gear selector
+Water flow regulator
§Chuck
/Supply cord with PRCD (DD350)/supply cord
(DD500)
:Carrying grips (2x)
·Water hose connector
$Type plate
£Interface
Drill stand
|Column
¡Carriage cap
QStrut
WBase plate
EClamping spindle
RClamping nut
TAnchor
ZLeveling screws (3x)
UHole center indicator
ICarriage
OEccentric (machine) locking bolt
PDirect drive
ÜReduction gear
[Carriage locking mechanism
]Hand wheel
Æ Carrying grip (2x)
ºSupply cord guide
•Type plate
ALeveling indicators (2x)
SEnd stop
DWheel assembly mounting point
ACCESSORIES
Vacuum base plate
FPressure gauge
GVacuum release valve
HVacuum seal
JVacuum hose connector
KWheel assembly mounting point
Water flow indicator
LWater flow indicator
Water collector system
ÖWater collector holder
ÄWater collector
†Seal
ŒSeal
ÅWater outlet cap
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Prohibition signs
Transport by
crane is not
permissible.
1.2 Explanation of warning signs and other symbols
Warning signs
General
warning Warning:
electricity Warning:
hot surface
Read the operat-
ing instructions
before use.
Other symbols
1.3 Other information
These numbers refer to the corresponding illustra-
tions. The illustrations can be found on the fold-out cover
pages. Keep these pages open while studying the oper-
ating instructions.
In these operating instructions, the designation “the
machine” refers to the DD500 or DD350 core drilling
machine.
Location of identification data on the machine
The type designation and serial number can be found
on the rating plate on the machine. Make a note of this
data in your operating instructions and always refer to
it when making an enquiry to your Hilti representative
or service department.
Type: DD350 DD-HD30
Serial no.:
Type: DD500 DD-HD30
Serial no.:
On the vacuum base plate On the machine
VACUUM
VACUUM
Top:
An additional means of secur-
ing the drill stand must be
employed when used for hori-
zontal drilling with vacuum
attachment.
Bottom:
Use of the vacuum base plate
to secure the drill stand for
overhead drilling is not per-
missible.
Operate only when connected to a
functioning PRCD.
(Only for DD 350, 220–240 V)
PRCD
208188
Recycle waste
material.
V
~no∅
HzW/min
A
rpm
Amps Volts Watts Hertz Revolutions
per minute
Revolutions
per minute Alternating current Nominal speed under
no load
Diameter
Obligation signs
Wear eye
protection Wear a safety
helmet Wear ear
protection Wear safety
gloves Wear safety boots
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2. Description
2.1 Use of the equipment as intended
The DD 350 or DD 500, with the DD HD-30 drill stand,
form drilling rigs designed for wet core drilling in min-
eral materials using diamond core bits (hand-held use
is not permissible).
The drive unit must always be mounted on the drill stand
when in use and the drill stand secured adequately by
means of an anchor, vacuum base plate or quick-release
brace.
Manipulation or modification of the machine, drill stand
or accessories is not permissible. To avoid the risk of
injury, use only genuine Hilti accessories and insert tools.
Observe the information printed in the operating instruc-
tions concerning operation, care and maintenance.
Observe the safety precautions and operating instruc-
tions for the accessories used.
Do not strike the base plate with a hammer or other heavy
object when making adjustments to it.
The machine, drill stand, accessories and insert tools
may present hazards when used incorrectly by untrained
personnel or not as directed.
The machine may be operated only when connected to
an adequately rated electric supply equipped with an
earth/ground conductor.
DD 350
Equipment
System with water collector
System without water collector
Core bit diameters
50–250 mm
50–500 mm
Drilling direction
All directions
All directions
The machines are designed and built in accordance with
IP55 and are thus resistant to sprayed water. This allows
drilling to be carried out in all directions without use of
a wet-type industrial vacuum cleaner.
The machines may be operated only when connected to
an adequate cooling water supply (at least 0.5 l/min. at
max. 30 °C water temperature).
If the drill stand column is extended to a length of 2 meters
or longer, an additional means of support, e.g. the brac-
ing spindle (item no. 305940) must be used.
Horizontal drilling in conjunction with the vacuum base
plate (accessory) is permissible only when an additional
means of securing the drill stand is employed.
Drilling into materials hazardous to the health (e.g.
asbestos) is not permissible.
2.2 Items supplied
DD 350 or DD 500 diamond drilling machine
Operating instructions
DD 500
Equipment
System with water collector
System without water collector
Core bit diameters
82–250 mm
82–600 mm
Drilling direction
All directions
All directions
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3. Accessories
Water flow indicator
DD-HD30 drill stand
Depth gauge
Water collector holder
Column extension, 1 m
Column extension, 0.3 m
Vacuum base plate
Vacuum pump
Spacer
Wheel assembly
Clamping spindle
Clamping spindle M16
Clamping nut
Water collector 8–87 (with seal, also suitable for dry drilling)
Water collector 25–152 (with seal, also suitable for dry drilling)
Water collector 92–250 (with seal, also suitable for dry drilling)
Chuck, BS/BR
Chuck, BL
Chuck, Pixie
Adaptor BU ➝BL
Adaptor BL ➝BU
Adaptor BS ➝BL
Adaptor BL ➝BS/BR
Adaptor BL ➝Pixie
Extension DD-BS-ET 200 S (steel)
Extension DD-BS-ET 500 S (steel)
Extension DD-BS-ET 300 S (aluminium)
Extension DD-BS-ET 500 S (aluminium)
Core bit extension BL 30 cm
Cross-column adaptor
Drainage hose
Connector (for dry drilling)
Vacuum cleaner (for dry drilling, e.g. Hilti VCU 40, VCD 50)
305939
305534
305535
305536
305537
285296
305538
332158
305539
305541
305940
220947
251834
232204
232221
232243
305904
282987
305905
305909
282989
284891
305910
283982
202898
202899
202900
202901
305903
305540
202992
46938
000000
3.1 Core bits to be used
Machine Diameter Standard
range working length
DD 350 52–500 mm 500 mm
DD 500 82–600 mm 500 mm
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4. Technical data
Machine
Rated voltage*
Rated power input*
Rated current*
Rated frequency
Rated speed under no load
Chuck
Max. permissible water supply
pressure
Min. required water flow rate
Dimensions (LxWxH)
Weight in accordance with
EPTA procedure 01/2003
Weight drill stand DD-HD 30
Max. operating weight
Drilling depth
Protection class as per
EN/IEC 61029
Resistant to dust and sprayed
water (IP code)
Noise emission information (measured in accordance with EN 61029-2-6:2010):
Typical A-weighted noise power
level (LWA):
Typical A-weighted noise
emission pressure level (LpA):
Uncertainty K for the given
sound level:
Wear ear protection!
Total triaxial vibration values (vibration vector sum) at the hand wheel (star handle) ah
Drilling in concrete (wet), ah:
Uncertainty K:
Typical weighted vibration at the
hand wheel:
PRCD ground fault interrupter
** The machine is available in several versions with different voltage ratings. Please refer to the type plate for the voltage rating and input power
rating of your machine.
** The DD 350 110 V is suitable only for intermittent operation with 40% relative switched-on time (operating mode S3, intermittent operation,
in accordance with DIN EN 60034-1). After running for 24 minutes at maximum load the machine must be allowed to cool for at least 36
minutes.
DD 350
110 V** 220 V 230 V 240 V 220–240V
2750W S3 40% 3520 W 2300 W 3600 W 3600 W
25 A 16 A 10 A 15 A 16 A
50 Hz 50/60 Hz 50 Hz 50 Hz 50/60 Hz
670–240 670–270 670–270 670–270 670–270
/min /min /min /min /min
BL (or other types)
6 bar (at higher pressures, a pressure reduction valve must be fitted at the
site water supply connection)
0.5 l/min (at max. 30 °C water temperature)
608×192×216 mm
14.4 kg
18.3 kg
70 kg (machine, drill stand, 500 mm dia. core bit)
max. 500 mm without extension
Protection class I (earthed/grounded)
IP55
108 dB (A)
95 dB (A)
3 dB (A)
2.5 m/s2
1.5 m/s2
2.5 m/s2
-NOTE-
The vibration emission level given in this information sheet has been measured in accordance with a standardised
test given in EN 61029 and may be used to compare one tool with another. It may be used for a preliminary assess-
ment 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
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Machine
Rated voltage*
Rated power input*
Rated current*
Rated frequency
Rated speed under no load
Chuck
Max. permissible water supply pressure
Min. required water flow rate
Dimensions (L×W×H)
Weight in accordance with EPTA procedure 01/2003
Weight drill stand DD-HD 30
Max. operating weight
Drilling depth
Protection class as per EN/IEC 61029
Resistant to dust and sprayed water (IP code)
Noise emission information (measured in accordance with EN 12348/A1:2009):
Typical A-weighted noise power level (LWA):
Uncertainty K for the given noise power level:
Typical A-weighted noise emission
pressure level (LpA):
Uncertainty K for the given noise emission presure
level:
Wear ear protection!
Total triaxial vibration values (vibration vector sum) at the hand wheel (star handle) ah
Drilling in concrete (wet), ah:
Uncertainty K:
* The machine is available in several versions with different voltage ratings. Please refer to the type plate for the voltage rating and input power
rating of your machine.
DD 500
318 V–415 V 3~
5500 W
9–10.5 A
50/60 Hz
580–270 /min
BL (or other types)
6 bar (at higher pressures, a pressure reduction valve
must be fitted at the site water supply connection)
0.5 l/min (at max. 30 °C water temperature)
608×192×216 mm
16.6 kg
18.3 kg
83 kg (machine, drill stand, 600 mm dia. core bit)
max. 500 mm without extension
Protection class I (earthed/grounded)
IP55
115 dB (A)
2.5 dB (A)
100 dB (A)
4 dB (A)
4.5 m/s2
1.5 m/s2
-NOTE-
The vibration emission level given in this information sheet has been measured in accordance with a standardised
test given in EN 12348 and may be used to compare one tool with another. It may be used for a preliminary assess-
ment 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.
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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5.1 Basic safety precautions
CAUTION: To avoid the risk of electric shock, injury or
fire, the following basic safety precautions must always
be observed when using electrically-powered machines.
Read all of these instructions before using this machine
and keep this list of safety precautions for future ref-
erence.
5.2 The necessary safety precautions at the
workplace
●Approval must be obtained from the site engineer or
architect prior to beginning drilling work. Drilling
work on buildings and other structures may influ-
ence the statics of the structure, especially when
steel reinforcing bars or load-bearing components
are cut through.
●Ensure that the workplace is well lit.
●Ensure that the workplace is well ventilated.
●Keep the workplace tidy. Objects which could cause
injury should be removed from the working area.
Untidiness at the workplace can lead to accidents.
●Secure the danger area. Ensure that no persons can
be injured and no property damaged by falling objects
or objects that may fly off while the machine is in
operation. Employ suitable measures, e.g. use sup-
ports etc. to ensure that the drilled-out core remains
in its original position. The resulting opening must
be securely and visibly cordoned off in order to avoid
the risk of persons falling.
●Secure the workpiece. Use clamps or a vice to secure
the workpiece. The workpiece is thus held more
securely than by hand and both hands remain free
to operate the machine.
●Use protective equipment. Wear eye protection.
●Wear a breathing mask if the work creates dust.
●Wear suitable working clothing. Do not wear loose
clothing, loose long hair or jewelry as it can become
caught up in moving parts. Wear suitable headgear
if you have long hair.
●It is recommended that non-slip shoes or boots are
worn when working outdoors.
●Keep other persons away. Do not allow other per-
sons, especially children, to touch the machine or
supply cord. Keep other persons away from the work-
ing area.
●Avoid unfavorable body positions. Work from a secure
stance and stay in balance at all times.
●To avoid tripping and falling when working, always
lead the supply cord, extension cord and water hose
away to the rear.
●Keep the supply cord, extension cord, water hose
and vacuum hose away form rotating parts of the
machine.
●-WARNING- Before beginning drilling, check that
there are no live electric cables located in the area
where the hole is to be made.
●Concealed electric cables or gas and water pipes pre-
sent a serious hazard if damaged while you are work-
ing. Accordingly, check the area in which you are
working beforehand (e.g. using a metal detector).
External metal parts of the machine may become
live, for example, when an electric cable is drilled
into inadvertently.
●Do not work from a ladder.
●-WARNING- The DD 500 may be operated only with
a correctly-functioning RCD residual current device
/ GFCI ground fault circuit interrupter. Check the
electric supply each time before use to ensure that
an RCD residual current device / GFCI ground fault
circuit interrupter is present and in working order.
●Check that all core bits are in good condition before
use. Do not use deformed or damaged core bits.
5.3 General safety precautions
●Use the right machine for the job. Do not use under-
powered machines for heavy work. Do not use the
machine for purposes for which it was not intended
- use it only as directed and when it is in faultless
condition.
●Use only the original accessories or ancillary equip-
ment listed in the operating instructions. Use of other
insert tools or other accessories may present a risk
of personal accident.
●Take the influences of the surrounding area into
account. Do not use the machine where there is a
risk of fire or explosion.
●Keep the grips dry, clean and free from oil and grease.
●Do not overload the machine. It will work more effi-
ciently and more safely within its intended perfor-
mance range.
●Store machines, when not in use, in a secure place.
When not in use, machines must be stored in a dry
place, locked up or out of reach of children.
●Unplug the machine from the electric supply when
it is not in use, during pauses between work, before
maintenance and when changing core bits.
●If a PRCD is supplied with the power tool, never
operate the power tool without the PRCD (GB ver-
sion: never operate the power tool without the iso-
lating transformer). Test the PRCD each time before
use (DD 350, 220 to 240 V).
5. Safety precautions
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●Take care of your core bits. You will be able to work
more efficiently and more safely if the core bits are
kept sharp and clean.
●Check the machine for possible damage. Protective
devices and any parts that may have suffered slight
damage should be checked for correct operation and
functionality before further use. Check that moving
parts function correctly without sticking and that no
parts are damaged. All parts must be fitted correctly
and fulfill all conditions necessary for correct oper-
ation of the machine. Damaged safety devices or
other damaged parts must be replaced or repaired
properly by an authorized repair workshop unless
otherwise indicated in the operating instructions.
●Avoid skin contact with drilling slurry.
●Wear respiratory protection when the work creates
dust, e.g. during dry drilling. Connect a vacuum
cleaner to the drilling system. Drilling into materials
hazardous to the health (e.g. asbestos) is not per-
missible.
●The machine is not intended for use by children,
by debilitated persons or those who have received
no instruction or training.
●Children must be instructed not to play with the
machine.
●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 spe-
cialists. 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.
5.3.1 Mechanical hazards
●Follow the instructions concerning care and main-
tenance.
●Follow the instructions concerning lubrication and
changing insert tools.
●Check that the insert tools used are compatible with
the chuck system and that they are secured in the
chuck correctly.
●Make sure that the machine is correctly and securely
attached to the drill stand.
●Keep a safe distance from the core bit while drilling
(see definition of danger zone, section 6.1) and do
not touch rotating parts. Always unplug the supply
cord before touching or handling the core bit.
●Make sure that all clamping and adjusting screws
are tightened correctly.
●After detaching the column extension, the end cap
(with built-in end stop ) must be refitted to the drill
stand in order to retain the safety-relevant function
of the end stop.
5.3.2 Electrical hazards
●Protect yourself against electric shock. Avoid body
contact with earthed/grounded objects, e.g. pipes,
radiators, cookers and fridges.
●Check the condition of the supply cord and its plug
connections and have it replaced by a qualified elec-
trician if damage is found. Check the condition of the
extension cord and replace it if damage is found.
●Check the condition of the machine and its acces-
sories. Do not operate the machine or its accessories
if damage is found, if the machine is incomplete or
if its controls cannot be operated faultlessly.
●Do not touch the supply cord in the event of it suf-
fering damage while working. Disconnect the sup-
ply cord plug from the socket.
●Damaged or faulty switches must be replaced at a
Hilti service center. Do not use the machine if it can-
not be switched on and off correctly.
●Have the machine repaired only by a trained electri-
cal specialist (Hilti service center) using original Hilti
spare parts. Failure to observe this point may result
in risk of accident to the user.
●Do not use the supply cord for purposes for which
it is not intended. Never carry the machine by the
supply cord. Never pull the plug out of the socket by
pulling the supply cord.
●Do not expose the supply cord to heat, oil or sharp
edges.
●When working outdoors, use only extension cords
that are approved and correspondingly marked for
this application.
●In the event of a power failure: Switch the machine
off and unplug the supply cord.
●Avoid using extension cords with multiple sockets
and the simultaneous use of several machines con-
nected to one extension cord.
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5.3.3 Thermal hazards
●The core bit may become hot during use. Wear pro-
tective gloves when changing core bits.
5.4 Requirements to be met by users
●The machine is intended for professional use.
●The machine may be operated, serviced and repaired
only by authorized, trained personnel. This person-
nel must be informed of any special hazards that may
be encountered.
●Always concentrate on the job you are doing. Proceed
carefully and do not use the machine if your full atten-
tion is not on the job.
●Help to improve the circulation of blood in your fin-
gers by relaxing your hands and doing finger exer-
cises during breaks between working.
5.5 Personal protective equipment
●The user and any other persons in the vicinity must
wear suitable eye protection, a hard hat, ear protec-
tion, protective gloves and safety footwear while the
machine is in use.
Wear a
hard hat Wear ear protection Wear protec-
tive gloves Wear
safety
footwear
Wear eye
protection
6. Before use
-CAUTION-
The mains voltage must correspond with the informa-
tion printed on the type plate.
Ensure that the machine is disconnected from the elec-
tric supply.
6.1 Preparations
-CAUTION-
The machine, the diamond core bit and the drill stand
are heavy. There is a risk of pinching parts of the body.
Wear a hard hat, protective gloves and safety footwear. The hatched area in the drawing above indicates the dan-
ger zone around the machine. Parts of the body must
be kept at least 15 cm away while the machine is in
operation.
min. 15cm
min. 15cm
min. 15cm
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6.1.4 Fastening the drill stand with the vacuum
base plate (accessory) 
-CAUTION-
Check the surface on which the vacuum base plate is to
be mounted. An uneven, rough surface can significantly
reduce the effectiveness of the vacuum fastening sys-
tem. Coatings or laminated surfaces may be pulled away
while working with the vacuum base plate.
-CAUTION-
Suitable for use only with core bits of up to 300 mm
diameter and without use of a spacer.
-NOTE-
The hand grip on the vacuum base plate is equipped
with a vacuum valve which can be used to release the
vacuum.
Check the condition of the seal on the vacuum base plate
at regular intervals and replace it if found to be worn or
damaged.
1. Turn the four leveling screws back until they project
approx. 5 mm beneath the vacuum base plate.
2. Connect the hose between the vacuum base plate and
the vacuum pump.
3. Position the drill stand on the vacuum base plate.
4. Fit and tighten the screw and washer provided.
5. Mark the center point of the hole to be drilled.
6. Draw a line approximately 800 mm in length from the
center mark toward the approx. position at which the
drill stand is to be secured.
7. Make a mark on the 800 mm line at a distance of
165 mm (61/2″) from the hole center mark.
8. Bring the marks on the vacuum base plate into align-
ment with the 800 mm line.
9. Position the center of the front edge of the vacuum
base plate on the line at the 165 mm (61/2″) mark.
-CAUTION- Make yourself familiar with information con-
tained in the operating instructions for the vacuum pump
and follow these instructions before using the vacuum
pump.
10. Switch on the vacuum pump and press the vacuum
release valve.
11. Once the drill stand has been positioned correctly,
remove your finger from the vacuum release valve
and press the base plate against the work surface.
VACUUM
VACUUM
Overhead drilling with the drill stand
fastened by vacuum is not permissible.
6.1.1 Setting up the drill stand 
-NOTE-
If the drill stand has been folded up to facilitate trans-
port, proceed as follows:
1. Release the screws at the top end of the strut and at
the column pivot.
2. Pivot the column into the vertical position (as far as
it will go).
3. Tighten the screw at the top end of the strut and at
the column pivot securely.
-CAUTION-
The end cap must be fitted on the end of the column. It
serves as a protector and as the end stop.
6.1.2 Fitting the hand wheel 
-NOTE-
The hand wheel can be fitted on the left or right side of
the carriage, on either of the two axles. The upper axle
drives the carriage directly while the lower axle drives
the carriage by way of reduction gearing.
1. Fit the hand wheel to one of the two axles on either
the left or right side of the carriage.
2. Secure the hand wheel with the screw provided.
6.1.3 Fastening the drill stand with an anchor 
-WARNING-
Use an anchor suitable for the material on which you
are working and observe the anchor manufacturer's
instructions.
-NOTE-
Hilti M16 metal expansion anchors are usually suitable
for fastening diamond core drilling equipment to uncracked
concrete. Under certain conditions it may be necessary
to use an alternative fastening method. Please contact
Hilti Technical Service if you have any questions about
secure fastening.
1. Set the anchor, of a type suitable for the material on
which you are working, ideally at a distance of 330
mm (13") from the center of the point where the hole
is to be drilled.
2. Screw the clamping spindle (accessory) into the anchor.
3. Place the drill stand over the spindle and position it
correctly with the aid of the hole center indicator (the
hole center indicator cannot be used to position the
drill stand if the spacer (accessory) is fitted).
4. Screw the clamping nut onto the spindle but do not
tighten it fully.
5. Use the 3 leveling screws to level the base plate. The
2 leveling indicators on the carriage serve as an aid.
Check that all leveling screws are in firm contact with
the surface.
6. Use a 27 mm open-end wrench to tighten the clamp-
ing nut on the spindle. Do not use a hammer or other
heavy object when doing so as this may damage the
base plate. The strut can be pivoted out of the way to
provide better access. It must, however, be secure-ly
re-attached to the column before starting the machine.
7. Check to ensure that the drill stand is fastened securely.
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-CAUTION- Before beginning drilling and during oper-
ation, it must be ensured that the pressure gauge pointer
remains within the green area.
12. Use the four leveling screws to level the vacuum
base plate. The 2 built-in level indicators on the car-
riage serve as leveling aids. -WARNING- Do not
attempt to level the anchor base plate on the vac-
uum base plate as this is not possible.
13. An additional means of securing the drill stand must
be employed when drilling horizontally (e.g. a chain
attached to an anchor, ...)
14. Check that the drill stand is fastened securely.
6.1.5 Adjusting the angle of the drill stand
(adjustable to max. 45°) 
-CAUTION-
Take care to avoid pinching your fingers at the pivot.
Wear protective gloves.
1. Release the screw at the pivot at the lower end of the
column and at the strut at the top end.
2. Bring the column into the desired position. The angle
scale on the rear serves as an adjustment aid.
3. Retighten the two screws securely.
6.1.6 Using the column extension (accessory) 
-CAUTION-
When starting a hole do not use core bits or extensions
with a total length of more than 650 mm.
1. Remove the end cap (with built-in end stop) from the
top end of the column and refit it to the end of the col-
umn extension.
2. Fit the cylindrical section of the column extension into
the end of the column on the drill stand.
3. Secure the column extension by tightening the eccen-
tric locking bolt.
4. A depth gauge (accessory) may be fitted on the col-
umn as an additional end stop.
5. After detaching the column extension, the end cap
must be refitted to the drill stand in order to retain the
safety-relevant function of the end stop.
6.1.7 Fitting the spacer (accessory) 
-NOTE-
The distance between the drilling axis and the drill stand
must be increased by fitting the spacer when diamond
core bits with a diameter greater than 300 mm are to be
used. The hole center indicator cannot be used in con-
junction with the spacer. A maximum of 2 spacers may
be fitted, one behind the other. These instructions pre-
sume that the machine is not already fitted.
1. Lock the carriage in position on the column (activate
the carriage locking mechanism). The carriage is
locked when the locking bolt is engaged. Check this
by turning the hand wheel at the locking mechanism.
No movement of the carriage is possible when in this
position (locked).
2. Pull out the machine locking bolt.
3. Fit the spacer onto the carriage.
4. Push the locking bolt into the carriage as far as it will
go.
5. Tighten the locking bolt securely.
6.1.8 Mounting the machine on the drill stand 
-CAUTION-
Ensure that the machine is disconnected from the elec-
tric supply.
1. Lock the carriage in position on the column (activate
the carriage locking mechanism). The carriage is
locked when the locking bolt is engaged. Check this
by turning the hand wheel at the locking mechanism.
No movement of the carriage is possible when in this
position (locked).
2. Pull out the machine locking bolt.
3. Fit the machine onto the carriage or spacer.
4. Push the locking bolt into the carriage or spacer as
far as it will go.
5. Tighten the locking bolt securely.
6. Clip the supply cord into the supply cord guide on the
carriage cover.
7. Check that the machine is mounted securely.
6.1.9 Connecting the water supply
-NOTE-
Before operating the machine, check that the 3-way valve
is in the wet or dry drilling position.
1. Connect the water supply hose to the machine.
2. Connect the hose to the water supply (hose coupling).
-NOTE-
A water flow indicator (accessory) can be connected
between the water supply hose and the hose connector
on the machine.
-CAUTION-
Check the hoses for damage at regular intervals and
make sure that the maximum permissible water supply
pressure of 6 bar is not exceeded.
6.1.10 Fitting the water collector system
(accessory) 
-NOTE-
Use of the water collector system permits water to be
drained away from the core bit thus avoiding soiling the
surrounding area. We recommend use of the water col-
lector system with core bits of up to 250 mm. diameter.
Best results are achieved in conjunction with a wet-type
vacuum cleaner. The drill stand must be set up at 90° to
the working surface.
The water collector seal must be of a size suitable for
the core bit diameter used.
1. Release the screw at the column pivot (at the front
lower end of the drill stand column).
2. Slide the water collector holder into place behind the
screw from below.
3. Tighten the screw securely.
4. Fit the water collector between the two moveable arms
of the water collector holder.
5. Secure the water collector by way of the two screws
on the water collector holder.
6. Connect a wet-type industrial vacuum cleaner to the
water collector or fit a length of hose through which
the water can drain away.
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6.1.11 Adjusting the depth gauge (accessory)
1. Turn the hand wheel until the core bit contacts the
material in which the hole is to be drilled.
2. Set the desired drilling depth by adjusting the distance
between the carriage and the depth gauge.
3. Secure the depth gauge by tightening the clamping
screw.
6.1.12 Fitting a diamond core bit (machine with
Hilti BL chuck) 
-CAUTION-
Fitting and positioning the core bit incorrectly can lead
to hazardous situations as parts can break and fly off.
Check that the core bit is seated correctly.
-DANGER-
Do 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.
-NOTE-
Diamond core bits must be replaced when the cutting
performance and/or rate of drilling progress drops sig-
nificantly. This generally is the case when the segments
reach a height of less than 2 mm.
-CAUTION-
The core bit may become hot during use or during sharp-
ening. Wear protective gloves when changing the core
bit.
1. Lock the carriage in position on the column (activate
the carriage locking mechanism) and check that the
drill stand is fastened securely.
2. Open the chuck by turning it in the direction of the
“open” symbol (open brackets).
3. Push the connection end of the diamond core bit into
the chuck on the machine from below until it engages
with the gear teeth.
4. Close the chuck by turning it in the direction of the
“closed” symbol (closed brackets).
5. Check that the diamond core bit it is held securely
(check by hand for play and try to pull it away from
the chuck).
6.1.13 Selecting the drilling speed 
Select the switch position according to the core bit dia-
meter to be used.
Core bit speed (r.p.m.) can be adjusted while the machine
is in operation.
6.2 Transport and storage
-CAUTION-
Transport the machine, drill stand and diamond core bit
as separate units.
Use the wheel assembly (accessory) to facilitate transport.
Open the water flow regulator before storing the machine.
Especially at temperatures below freezing, take care to
ensure that no water remains in the machine (see also
section 7.10).
6.3 Use of extension cords
Use only extension cords of a type approved for the
application and with conductors of adequate cross sec-
tion.
6.3.1 Recommended minimum conductor cross
section and max. cable lengths for the
DD 350
6.3.2 Recommended minimum conductor cross
section and max. cable lengths for the
DD 500:
6.4. Use of a generator or transformer
6.4.1 DD 350
This machine may be powered by a generator or trans-
former which meets the following specifications:
– AC voltage, output power at least 7,000 VA
– The operating voltage must be within 5% and –10%
of the rated voltage at all times.
– Frequency range 50–60 Hz; max. 65 Hz
– Automatic voltage regulation with starting boost
Never operate other machines or appliances from the
generator or transformer at the same time. Switching
other machines or appliances on and off may cause
undervoltage and/or overvoltage peaks, resulting in dam-
age to the machine.
6.4.2 DD 500
This machine may be powered by a generator or trans-
former which fulfills the following conditions:
– AC voltage, output power at least 10,000 VA
– The operating voltage must be within 5% and –10%
of the rated voltage at all times.
– Frequency range 50–60 Hz; max. 65 Hz
– Automatic voltage regulation with starting boost
Never operate other machines or appliances from the
generator or transformer at the same time. Switching
other machines or appliances on and off may cause
undervoltage and/or overvoltage peaks, resulting in dam-
age to the machine.
Mains voltage Conductor cross section
mm2
Conductor cross
section 1.5 2.0 2.5 3.5 4.0
110 V not per- not per- not per- 20 m 20 m
missible missible missible
220–240 V 20 m – 40 m 50 m 60 m
Do not use extension cords with 1.25 mm2or 16 AWG
conductor cross sections.
Mains voltage Conductor cross section
mm2
Conductor cross
section 1.5 2.5
380–440 V 30 m 75 m
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7.3 Operating the machine without the water
collector system and wet-type vacuum cleaner
-CAUTION-
The water flows away in uncontrolled fashion.
7.3.1 Switching on 
1. Open the water flow regulator slowly until the desired
volume of water is flowing.
2. Check that the core bit is not in contact with the base
material.
3. Press the ON switch on the machine.
4. Release the carriage lock while holding the handwheel
securely.
5. Turn the hand wheel until the core bit comes into con-
tact with the material in which the hole is being drilled.
6. Apply only light pressure until the core bit has become
centered and then gradually increase the pressure.
7. Regulate the pressure applied to the core bit by observ-
-DANGER-
Have the earth/ground conductor in the electric supply
and the earth/ground connection to the machine checked
at regular intervals in order to ensure that they are func-
tioning correctly.
-CAUTION-
The machine and the core drilling operation emit noise.
Wear ear protection.
-CAUTION-
The core drilling operation may cause hazardous frag-
ments to fly off. Wear eye protection and a hard hat.
7.1 Switching on and checking the PRCD ground
fault interrupter (DD 350, 220–240 V)
-CAUTION-
Use an isolating transformer with the 110V version.
1. Plug the machine supply cord into an electric socket
with earth connection.
2. Press the “ON” button on the PRCD ground fault inter-
rupter. (The indicator must light)
3. Press the “TEST” button on the PRCD ground fault
interrupter. (The indicator must go out).
-DANGER-
If the indicator continues to light, further operation of
the machine ist not permissible. Have the machine repair-
ed by a qualified specialist using genuine Hilti spare parts.
4. Press the “ON” button on the PRCD ground fault inter-
rupter again. (The indicator must light)
7. Operation
7.2 Core bit diameters and corresponding gears
DD 350
Speed under no load Speed under no load
Gear Core bit diameter 220–240 V [/min] 110 V [/min]
1 52–62 mm / 2˝–23/8˝ 667 667
2 72–92 mm / 23/4˝–31/2˝ 667 667
3 102–112 mm / 4˝–41/2˝ 667 619
4 122 mm / 43/4˝ 619 571
5 127–142 mm / 5˝–51/2˝ 571 524
6 152–162 mm / 6˝–63/8˝ 524 464
7 172–182 mm / 63/4˝–7˝ 405 369
8 202 mm / 8˝ 357 321
9 225–250 mm / 9˝–10˝ 310 286
10 300–500 mm / 12˝–20˝ 286 238
DD 500
Speed under no load
Gear Core bit diameter 380–415 V [/min]
1 82–92 mm / 31/4˝ – 31/2˝ 571
2 102–112 mm / 4˝ – 41/2˝ 571
3 122–132 mm / 43/4˝ – 51/4˝ 571
4 142–172 mm / 5 1/2˝–63/4˝ 571
5 182–202 mm / 7˝–8˝ 510
6 225–250 mm / 9˝–10˝ 429
7 300 mm / 12˝ 367
8 350 mm / 14˝ 327
9 400 mm / 16˝ 286
10 450–600 mm / 18˝–24˝ 265
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ing the drilling performance indicator (optimum drilling
performance is achieved when the green lamps in the
display light).
7.3.2 Using drilling-starting mode
-NOTE-
Strong vibration may occur when starting the hole. In
this case, use hole-starting mode.
1. Press the ON switch on the machine.
2. Press the ON switch a second time. The core bit then
rotates very slowly (approx. 21 /min).
3. Press the core bit firmly against the surface where
the hole is to be drilled.
4. After a short time in hole-starting mode (approx. 5
sec.), press the ON switch again. The core bit then
rotates at the normal running speed. Continue drilling
in the usual way.
7.3.3 Procedure when drilling through a rebar
-NOTE-
Slower drilling progress can be an indication of rebar
contact. The following procedure is recommended when
drilling through a rebar:
1. Press the Iron Boost button.
2. Press the Iron Boost button again when the rate of
drilling progress increases, indicating that the core
bit is through the rebar and drilling only into concrete.
The Iron Boost is then switched off.
-NOTE-
Use the Iron Boost for drilling in heavily reinforced con-
crete. Switch the Iron Boost off each time after drilling
through rebars in order to avoid reducing core bit life
unnecessarily.
7.4 Operating the drilling machine with the water
collector system (accessory)
-NOTE-
Use of the water collector system while drilling at an
angle is not possible. The water is allowed to flow away
through a length of hose.
-CAUTION-
Check that the core bit and water collector are centered
in relation to each other. The core bit fills with water dur-
ing overhead drilling.
7.4.1 Switching on 
1. Open the water flow regulator slowly until the desired
volume of water is flowing.
2. Check that the core bit is not in contact with the base
material.
3. Press the ON switch on the machine.
4. Release the carriage lock while holding the handwheel
securely.
5. Turn the hand wheel until the core bit comes into con-
tact with the material in which the hole is being drilled.
6. Apply only light pressure until the core bit has become
centered and then gradually increase the pressure.
7. Regulate the pressure applied to the core bit by observ-
ing the drilling performance indicator (Power Controls).
Optimum drilling performance is achieved when the
green lamps in the display light.
7.5 Operating the drilling machine with the water
collector system and wet-type vacuum cleaner
(accessory)
-NOTE-
Use of the water collector system while drilling at an angle
is not possible. The water is allowed to flow away through
a length of hose. The wet-type vacuum cleaner must be
switched on manually before beginning drilling and
switched off manually at the end of the drilling operation.
-CAUTION-
Check that the core bit and water collector are centered
in relation to each other.
The core bit fills with water during overhead drilling.
7.5.1 Switching on 
1. Switch on the wet-type vacuum cleaner. Do not use
automatic mode.
2. Ensure that the water supply is connected and ready
for use.
3. Open the water flow regulator.
4. Check that the core bit is not in contact with the base
material.
5. Press the ON switch on the machine.
6. Release the carriage lock while holding the handwheel
securely.
7. Turn the hand wheel until the core bit comes into con-
tact with the material in which the hole is being drilled.
8. Apply only light pressure until the core bit has become
centered and then gradually increase the pressure.
9. Regulate the pressure applied to the core bit by observ-
ing the drilling performance indicator (optimum drilling
performance is achieved when the green lamps in the
display light).
7.6 Dry drilling
-NOTE-
The 3-way valve must be in the dry drilling position.
To collect the dust, use a suitable dust removal system
consisting of the following listed accessories: water col-
lector ring and seal of the appropriate diameter, hose
connector and industrial vacuum cleaner. The dust removal
process must be assisted by applying a flow of com-
pressed air through the core bit (flow rate at least 30 l/s).
Wear a breathing mask if the work creates dust.
1. Remove the water outlet cap.
2. Start the water flow (required for motor cooling).
3. Allow the cooling water to flow away through the
drainage hose.
4. Switch on the vacuum cleaner and compressed air.
5. Check that the core bit is not in contact with the base
material.
6. Press the ON switch on the machine.
7. Release the carriage lock while holding the hand-
wheel securely.
8. Turn the hand wheel until the core bit comes into con-
tact with the material in which the hole is being drilled.
9. Apply only light pressure until the core bit has become
centered and then gradually increase the pressure.
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35
8. Care and maintenance
-CAUTION-
Disconnect the supply cord plug from the socket.
-CAUTION-
Keep the machine, especially its grip surfaces, clean and
free from oil and grease. Do not use cleaning agents
which contain silicone.
Care of insert tools and metal parts
Remove any dirt adhering to parts and rub the core bits
and the chuck with an oily cloth from time to time to pro-
tect their surfaces from corrosion.
8.1 Care of the machines
The outer casing of the machine is made from impact-
resistant plastic. Clean the outside of the machine at reg-
ular intervals with a cloth. Do not use a spray, steam
pressure cleaning equipment or running water for clean-
ing. This may negatively affect the electrical safety of the
machine.
8.2 Maintenance
Check all external parts of the machine for damage at
regular intervals and check that all controls operate fault-
lessly. Do not operate the machine if parts are damaged
or when the controls do not function faultlessly. If nec-
essary, the machine should be repaired at a Hilti repair
center.
Repairs to the electrical section of the machine may be
carried out only by trained electrical specialists.
10.Regulate the pressure applied to the core bit by
observing the drilling performance indicator (Power
Controls). Optimum drilling performance is achieved
when the green lamps in the display light).
7.7 Switching off 
1. Switch off the machine.
2. Withdraw the diamond core bit from the hole.
-CAUTION-
Exercise caution when drilling overhead: The core bit
fills with water.
3. Engage the carriage lock. The carriage is locked when
the locking bolt is engaged. Check this by turning the
hand wheel at the locking mechanism. No movement
of the carriage is possible when in this position (locked).
4. Close the water flow regulator.
5. Switch off the vacuum cleaner, if used.
6. After drilling overhead, the water must be drained
from the core bit. To do this, remove the water outlet
cap, attach a drainage hose (accessory) to the water
ontlet and then turn the 3-way valve to the middle
position. Keep the water away from the machine.
7. To ensure that the drill stand remains in balance, lower
the core bit until in contact with the working surface
or fold out the hole center indicator (this is not effec-
tive if using the vacuum base plate).
8. Unplug the supply cord or switch off the PRCD.
9. Remove the core.
-CAUTION-
The core may be very heavy.
7.8 Procedure in the event of the core bit sticking
The slip clutch will be activated if the core bit sticks. The
machine 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
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.
7.9 Removing the machine from the drill stand 
-CAUTION-
Ensure that the machine is disconnected from the mains
supply.
1. Lock the carriage in position on the column (activate
the carriage locking mechanism). The carriage is
locked when the locking bolt is engaged. Check this
by turning the hand wheel at the locking mechanism.
No movement of the carriage is possible when in this
position (locked).
2. Hold the machine securely with one hand on the car-
rying grip. (-CAUTION- The machine may fall if not
held securely.)
3. Release the machine eccentric locking bolt with the
other hand.
4. Pull out the eccentric locking bolt.
5. Remove the machine from the carriage.
6. Push the eccentric locking bolt back into the carriage
as far as it will go.
7.10 Storing and break times in sub-zero
temperatures
-CAUTION-
If break times are longer than one hour when working
at temperatures below 0°C (32°F) or if the machine is
to be stored at such temperatures, the water in the sys-
tem must be blown out with compressed air.
1. Disconnect the water supply hose from the machine.
2. Open the water flow regulator.
3. Set the 3-way valve to the wet drilling position.
4. Use compressed air (max. pressure 3 bar) to blow all
water out of the system.
7.11 Disposing of drilling slurry
see Section 10 “Disposal”
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