Hilti DC-EX 125/5"M User manual

DC-EX 125/5"M
Bedienungsanleitung de
Operating instructions en
Mode d’emploi fr
Manual de instrucciones es
Istruzioni d’uso it
Gebruiksaanwi zing nl
Brugsanvisning da
Bruksanvisning no
Bruksanvisning sv
Käyttöoh e fi
Manual de instruções pt
Οδηγιες χρησεως el
Használati utasítás hu
Návod k obsluze cs
Návod na obsluhu sk
Instrukc a obsługi pl
Upute za uporabu hr
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Инструкция по зксплуатации ru
Lietošanas pamācība lv
Instrukci a lt
Kasutus uhend et
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ORIGINAL OPERATING INSTRUCTIONS
DC-EX125 / 5" M cutting and slitting hood
It is essential that the operating instructions
are read before the tool is operated for the
first time.
Always keep these operating instructions to-
gether with the tool.
Ensure that the operating instructions are
with the tool when it is given to other persons.
Contents Page
1 General information 9
2Description 10
3 Accessories 10
4 Technical data 11
5 Safety instructions 11
6Beforeuse 13
7 Operation 14
8 Care and maintenance 14
9Disposal 15
10 Manufacturer’s warranty - tools 15
1These 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.
Operating controls and components 1
@Connector
;Locking catch
=Front clip
%Contact plate with cutting line indicator
&Catch
(Carriage plate
)Wheels
+Cover
§Direction-of-rotation arrow
/Side handle attachment point
:Depth adjustment locking lever
·Back panel
$Positioningmarkforfittingtoanglegrinder
£Mountingsleeveforfittingtoanglegrinder
|Direction of rotation indicator for positioning the
angle grinder
¡Depth gauge scale
QDepth gauge
WLocking screw
EDepth gauge operating catch
Slitting adapter set (accessory) 2
RAdapter
T3mmspacingwasher
Z6mmspacingwasher
UBreak-out tool
1 General information
1.1 Safety notices and their meaning
DANGER
Draws attention to imminent danger that will lead to
seriousbodilyinjuryorfatality.
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 informa-
tion.
1.2 Explanation of the pictograms and other
information
Warning signs
General
warning
Obligation signs
Wear eye
protection Wear ear protection Wear protective
gloves
en
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Symbols
Read the
operating
instructions
before use.
2 Description
2.1 Use of the product as directed
The DC‑EX 125/ 5" M slitting hood is used in conjunction with 125 mm/ 5" discs and a Hilti vacuum cleaner for cutting
and slitting mineral materials, especially masonry. The DC‑EX 125/ 5" M slitting hood is to be used exclusively with
the DCG 125‑S (DCG 500‑S) and DEG 125‑D/P (DEG 500) for dry cutting (use of water is not permissible).
Observe the information printed in the operating instructions concerning operation, care and maintenance.
Do not tamper with or modify the slitting hood.
2.2 Access to edges and corners
The front clip can be opened for cutting and slitting applications where good access to edges (against walls) and in
cornersisrequired.
2.3 Items supplied in the slitting adapter set (accessories)
1 Adapter
33mmspacingwasher
26mmspacingwasher
1Break-outtool
2.4 Diamond cutting discs approved for use with the tool
Diamond cutting discs Suitable materi-
als Arbour size Diameter Segment thick-
ness
M1 Masonry, sand-
lime block 22.23 H8 125 +3/-1 2.0 +0.5/-0.25
C1 Concrete, pre-
cast concrete 22.23 H7 125 ±1.5 2.4 ±0.15
C2 Hard concrete,
flint aggregates 22.23 H7 125 ±1.5 2.4 ±0.15
3 Accessories
Designation Description
Vacuum cleaner VCU 40
Vacuum cleaner VCD 50
Slitting adapter set DC‑EX‑SL set
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4 Technical data
Right of technical changes reserved.
Weight 1.35 kg (2.98 lbs)
Dimensions 250 mm X 85 mm X 230 mm (10 x 3¼ x 9 in)
Disc diameter 125 mm (5")
Slittingwidthwithtwindiscs 25mm(1")
Maximum cutting depth 28 mm (1¹/₈ in)
Connector For Hilti and other standard vacuum cleaners
Cutting position mark Discs on inside of line and maximum slitting width
Wheels 2 wheels and carriage for easy advance
Access at edges and in corners By opening the flip-up front clip
5 Safety instructions
5.1 General Power Tool Safety Warnings
a) WARNING
Read all safety warnings and all instructions. Fail-
ure 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.
5.1.1Workareasafety
a) Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
b) Do not operate power tools in explosive atmo-
spheres, 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 operat-
ing a power tool. Distractions can cause you to lose
control.
5.1.2 Electrical safety
a) Power tool plugs must match the outlet. Never
modify the plug in any way. Do not use any ad-
apter 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 condi-
tions. 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
theriskofelectricshock.
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.
5.1.3 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 safety shoes, hard hat, or hearing
protection used for appropriate conditions will reduce
personal injuries.
c) 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.
d) Remove any adjusting key or wrench before turn-
ing the power tool on. A wrench or a key left at-
tached to a rotating part of the power tool may result
in personal injury.
e) Do not overreach. Keep proper footing and bal-
ance at all times. This enables better control of the
power tool in unexpected situations.
f) 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.
g) If devices are provided for the connection of dust
extraction and collection facilities, ensure these
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are connected and properly used. Use of dust
collection can reduce dust-related hazards.
5.1.4 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 chil-
dren 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 main-
tained 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 opera-
tions different from those intended could result in a
hazardous situation.
5.1.5 Service
a) Have your power tool serviced bya qualified repair
person using only identical replacement parts.
This will ensure that the safety of the power tool is
maintained.
5.2 Additional safety rules
5.2.1 Safety rules for cutting with diamond discs
a) Read all safety warnings, instructions, illustra-
tions and specifications provided with this power
tool. Failure to follow all instructions listed below may
result in electric shock, fire and/or serious injury.
b) Always use the guard provided with the tool. The
guard must be securely attached to the power
tool and positioned for maximum safety, so the
least amount of diamond wheel is exposed to-
wards the operator. The guard helps to protect the
operator from broken diamond wheel fragments and
accidental contact with the diamond wheel.
c) Use only diamond cut-off wheels for your power
tool. Just because an accessory can be attached to
your power tool, it does not assure safe operation.
d) The rated speed of the diamond wheel must be
at least equal to the maximum speed marked on
the power tool. Diamond wheels running faster than
their rated speed can break and fly apart.
e) Diamond wheels must be used only for recom-
mended applications. For example: Do not grind
with the side of cut-off wheel. Abrasive cut-off
wheels are intended for peripheral grinding, side
forces applied to these wheels may cause them to
shatter.
f) Always use undamaged wheel flanges that are
of the correct diameter for your selected wheel.
Proper wheel flanges support the wheel thus redu-
cing the possibility of diamond wheel breakage.
g) The outside diameter and thickness of your dia-
mond wheel must be within the capacity rating of
your power tool. Incorrectly sized diamond wheels
cannot be adequately guarded or controlled.
h) The arbour size of diamond wheels and flanges
must properly fit the spindle of the power tool.
Diamond wheels and flanges with arbour holes that
do not match the mounting hardware of the power
tool will run out of balance, vibrate excessively and
may cause loss of control.
i) Do not use damaged diamond wheels. Before
each use, inspect the diamond wheels for chips
and cracks. If power tool or diamond wheel is
dropped, inspect for damage or install an undam-
aged wheel. After inspecting and installing the
diamond wheel, position yourself and bystand-
ers away from the plane of the rotating diamond
wheel and run the power tool at maximum no-load
speed for one minute. Damaged diamond wheels
will normally break apart during this time.
j) Wear personal protective equipment. Depending
on application, use face shield, safety goggles or
safety glasses. As appropriate, wear dust mask,
hearing protectors gloves and shop apron cap-
able of stopping small abrasive or workpiece
fragments. The eye protection must be capable of
stopping flying debris generated by various opera-
tions. The dust mask or respirator must be capable of
filtrating particles generated by your operation. Pro-
longed exposure to high-intensity noise may cause
hearing loss.
k) Keep bystanders a safe distance away from work
area. Anyone entering the work area must wear
personal protective equipment. Fragments of
workpiece or of a broken wheel may fly away and
cause injury beyond immediate area of operation.
l) Hold the power tool by insulated gripping surfaces
only, when performing an operation where the
diamond wheel may contact hidden wiring or its
own cord. Wheelcontactinga“live”wiremaymake
exposed metal parts of the power tool “live” and
shock the operator.
m) Position the cord clear of the spinning diamond
wheel. If you lose control, the cord may be cut or
snagged and your hand or arm may be pulled into
the spinning diamond wheel.
n) Never lay the power tool down until the diamond
wheel has come to a complete stop. The spinning
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diamond wheel may grab the surface and pull the
power tool out of your control.
o) Do not run the power tool while carrying it at your
side. Accidental contact with the spinning diamond
wheel could snag your clothing, pulling the wheel
into your body.
p) Regularly clean the power tool’s air vents. The
motor’sfanwilldrawthedustinsidethehousing
and excessive accumulation of powdered metal may
cause electrical hazards.
q) Do not operate the power tool near flammable
materials. Sparks could ignite these materials.
r) Do not use diamond wheels that require liquid
coolants. Using water or other liquid coolants
may result in electrocution or shock.
s) Do not use accessories which are not specifically
designed and recommended by the tool manufac-
turer. Just because the accessory can be attached
to your power tool, it does not assure safe operation.
5.2.2 Additional safety rules for cutting with
diamond discs
Kickback and related warnings
Kickback is a sudden reaction to a pinched or snagged
rotating wheel. Pinching or snagging causes rapid stalling
oftherotatingwheelwhichinturncausestheuncon-
trolled power tool to be forced in the direction opposite
of the wheel’s rotation at the point of the binding.
a) Maintain a firm grip on the power tool and po-
sition your body and arm to allow you to resist
kickback forces. Always use auxiliary handle, if
provided, for maximum control over kickback or
torque reaction during start-up. The operator can
control torque reactions or kickback forces if proper
precautions are taken.
b) Never place your hand near the rotating diamond
wheel. The diamond wheel may kick back over your
hand.
c) Do not position your body in line with and behind
the rotating diamond wheel. Kickback will propel
the tool in direction opposite to the wheel’s move-
ment at the point of snagging.
d) Use special care when working corners, sharp
edges etc. Avoid bouncing and snagging the dia-
mond wheel. Corners, sharp edges or bouncing
have a tendency to snag the rotating diamond wheel
and cause loss of control or kickback.
e) Do not attach a saw chain, woodcarving blade
or toothed saw blade. Such blades create frequent
kickback and loss of control.
f) Do not “jam” the diamond wheel or apply excess-
ive pressure. Do not attempt to make an excessive
depth of cut. Overstressing the diamond wheel in-
creases the loading and susceptibility to twisting or
binding of the wheel in the cut and the possibility of
kickback or wheel breakage.
g) When the diamond wheel is binding or when inter-
rupting a cut for any reason, switch off the power
tool and hold the power tool motionless until the
wheel comes to a complete stop. Never attempt to
remove the diamond wheel from the cut while the
wheel is in motion otherwise kickback may occur.
Investigate and take corrective action to eliminate the
cause of the diamond wheel binding.
h) Do not restart the cutting operation in the work-
piece. Let the diamond wheel reach full speed
and carefully reenter the cut. The diamond wheel
may bind, walk up or kick back if the power tool is
restarted in the workpiece.
i) Support panels or any oversized workpiece to
minimize the risk of the diamond wheel pinching
and kickback. Large workpieces tend to sag under
their own weight. Supports must be placed under the
workpiece near the line of cut and near the edge of
the workpiece on both sides of the wheel.
j) Use extra caution when making a “pocket cut”
into existing walls or other blind areas. The pro-
truding diamond wheel may cut gas or water pipes,
electrical wiring or other objects that can cause kick-
back.
6Beforeuse
6.1 Fitting the cutting and slitting hood to the
power tool 3
1. Fitthehoodontothedrivespindlecollarsothatthe
positioning marks on the hood and on the power
tool are in alignment.
2. The hood can be brought into the desired working
position by operating the catch on the angle grinder
and simultaneously pivoting the power tool.
NOTE Take care to ensure that the catch is heard
to engage positively. Only then is the hood securely
attached to the power tool.
6.2 Opening the hood 4
1. Press the catch.
2. Open the front clip.
3. Press the locking catch and open the cover to allow
access for fitting/removing diamond discs.
6.3 Fitting single discs for cutting 6
1. Fit the clamping flange onto the drive spindle.
2. Fit the diamond cutting disc according to the spe-
cified direction of rotation (observe the direction-of-
rotation arrow).
3. Screw on the clamping nut or the Kwik-Lock nut
until it is seated against the disc and then tighten it
securely.
4. Close the hood.
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6.4 Fitting the two diamond cutting discs for
slitting work 5
CAUTION
Use of Kwik-Lock nuts for this application is not
permissible.
NOTE
The slitting adapter set, available as an accessory, is
required for fitting two diamond cutting discs.
1. Remove the clamping flange from the drive spindle.
2. Screw the adapter onto the drive spindle and tighten
it securely.
3. Fit the first diamond cutting disc, observing the
specified direction of rotation (arrow).
4. Fit the spacing ring corresponding to the desired
slitting width.
5. Fit the second diamond cutting disc and any re-
maining spacing washers, observing the specified
direction of disc rotation (arrow).
6. Screw the clamping nut onto the drive spindle and
tighten it securely with the wrench.
7. Close the hood.
6.5 Depth adjustment 7
1. Press the depth adjustment locking lever.
2. Set the desired cutting depth according to the scale
by pressing the depth adjustment catch.
3. The locking screw can be used to prevent movement
of the plunge mechanism.
6.6 Plunge function
The plunge function can be used to plunge the diamond
cutting discs into the material to be cut after the carriage
is positioned on the working surface.
6.7 Fitting the side handle 8
1. CAUTION When the hood is used for cutting or
slitting work, the side handle must always be
fitted to the hood.
Screw the side handle into the threaded boss
provided on the left or right side of the hood or
angle grinder.
NOTE Thesidehandlemaybefittedoneitherside
(suitable for right or left-handed users).
7Operation
7.1 Access to edges and corners 9
DANGER
Wait until the power tool has come to a complete
stop.
1. Press the locking catch.
2. Open the front clip until it engages in the open
position (greater than 180°).
7.2 Marking the cutting position 
The first mark, at the gearing side, indicates the position
of the inner cutting disc or single disc. The second mark
indicates the maximum slitting width (max. position of
the second disc).
7.3 Removing the disc(s) 
1. Open the hood, as described in the section “Open-
ing the hood”.
2. Whenasinglediscisfitted,removethediamond
cutting disc by releasing the clamping nut or Kwik-
Lock nut.
3. When two diamond cutting discs are used, remove
the spacer washers.
4. Remove the second diamond cutting disc and the
clamping flange.
5. Use the wrench to release the adapter.
6. Press the catch on the angle grinder.
7. Rotate the hood around the spindle axis until it can
be lifted away from the angle grinder.
7.4 Breaking out the middle rib when slitting 
Break out the rib of material between the slits with the
aid of the break-out tool.
8 Care and maintenance
CAUTION
Disconnect the power tool supply cord plug from the
power outlet.
8.1 Care and maintenance of the hood
Clean the clamping flange, adapter, clamping nut, spindle
and the depth gauge with a cleaning cloth, a brush or, if
necessary, with compressed air.
8.2 Checking the appliance after care and
maintenance
After carrying out care and maintenance, check that all
protective and safety devices are fitted and that they
function faultlessly.
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9 Disposal
Most of the materials from which Hilti tools or appliances 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 old tools and appliances for recycling. Ask Hilti customer service or your Hilti representative for further
information.
10 Manufacturer’s warranty - tools
Hilti warrants that the tool supplied is free of defects in
materialandworkmanship.Thiswarrantyisvalidsolong
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 main-
tained. 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 re-
placement 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 na-
tional rules prohibit such exclusion. In particular, Hilti
is not obligated for direct, indirect, incidental or con-
sequential damages, losses or expenses in connec-
tion 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 the 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.
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*267722*
267722
Hilti Corpor tion
LI-9494 Sch n
Tel.:+423 / 2342111
F x:+423 / 2342965
www.hilti.com
Hilti = registered tr dem rk of Hilti Corp., Sch n
W 3252 | 1212 | 00-Pos. 1 | 1
Printed in Liechtenstein © 2012
Right of technic l nd progr mme ch nges reserved S. E. & O.267722 / A2
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