Makita DBM230 User manual

D
Diamant
-
Kernbohrmaschine
Originalbetriebsanleitung
GB
Diamond Core Drill
Original Instructions
F
Carotteuse diamant à eau
Notice originale
I
Carotatrice ad umido
Istruzioni originali
E
Taladro Para Broca de Dia
mante
corte húmedo
Instrucciones de servicio originales
PT
Berbequim com broca de diamante
húmida
Manual original
NL
Diamantkernboor, nat gebruik
Oorspronkelijke gebruiksaanwijzing
DK
Våddiamantkerneboremaskine
Original brugsanvisning

ENGLISH
Icons
Warning: general precaution
Warning: dangerous voltage
Warning: hot surface
Tool, drill bit and stand are heavy -
caution: risk of squashing
Danger of tearing or cutting
For your protection the following safety measures should be taken:
Wear ear protection
Wear safety goggles
Wear protective helmet
Wear protective gloves
Wear safety shoes
Disconnect from power before working on the tool!

Equipment characteristics
:
Wet Diamond Core Drill DBM 230
Rated Voltage: 230 V ~
Rated Power Input: 2500 W
Rated Current: 13,5 A
Frequency:: 40-60 Hz
max. Drilling Diameter: 230 mm
Holding fixture: 1¼" UNC
Insulation Class: I
IP Rating: IP 20
Weight according to EPTA Procedure 01/2003: 11,3 kg
Interference Suppression: EN 55014 und EN 61000
Gear No-Load
Speed Load Speed max.
Drilling Diameter
 390 min
-
1
270 min
-
1
230 mm
 1040 min
-
1
700 min
-
1
100 mm
 1700 min
-
1
1250 min
-
1
60 mm
Prescribed use
The Wet Diamond Core Drill DBM 230 shall only be operated by trained
personnel!
The DBM 230 in connection with wet core drill bits is designed for drilling in
concrete, stone and masonry for wet cutting only.
The tool may only be used in conjunction with a suitable diamond drilling
stand (P-54190).
Safety precautions
Important directions and safety precautions are represented by symbols on the
tool.
Read these instructions carefully and completely and adhere
to them strictly in order to ensure safe working conditions.
In addition, the general safety regulations in the annexed
brochure must be observed. Before using the tool for the
first time, ask for a practical demonstration.

Work carefully and with concentration. Keep your work area
clean and avoid hazardous situations.
Take precautions for the protection of the operator.
If the cable is damaged or severed during operations, do not
touch the cable, immediately pull the main plug. Never use the
tool when the cable is damaged.
Before drilling in ceiling or walls make sure not to drill into
electrical mains, gas or water pipes. Use a metal detection
system where appropriate. Consult the structural engineer in
charge in order to determine the exact position of drilling before
you start. When drilling through ceilings, secure the area below
as the drill core may drop downwards.
Take care not to expose the tool to direct rain.
 Do not operate the tool in areas with explosion hazard.
 Do not operate while standing on ladders.
 Material containing asbestos must not be drilled.
 Never carry the tool by the cable. Before using the tool make sure to
check tool, cable and plug. Damages must be repaired by an
authorized specialist. Make sure that the tool is switched off before
connecting to the power outlet.
 Manipulations of the tool will result in a forfeit of the warranty.
 During operations the tool must be under constant supervision.
 The tool should be switched off and disconnected from power when
not under supervision, in case of mounting or dismounting the tool, in
case of voltage drops or when fixing or mounting accessories.
 If the engine stops during operations switch the tool off. Thus you
avoid an undesired sudden re-start of the engine.
 Do not use when parts of the housing, the switch, power cable or plug
are damaged.
 Electric tools must be visually inspected and tested by a specialist at
regular intervals.
 When operating the drill, cooling water must never get into the
motor and all electrical parts. Overhead-drilling must only be
performed while observing suitable safety precautions (water
collection).
 Stop operating when water is seeping out of the overflow tap in the
gear collar and take the tool to an authorized service point.
 After an interruption of operations, the engine should only be switched
on again if the drill bit can be turned freely.
 When operating the tool always wear ear protection.
 Do not touch rotating parts.

 Persons under 16 years of age must not operate the tool and persons
over 16 and under 18 must only use under close supervision
 The operator and persons in the vicinity must wear appropriate safety
goggles, protective helmet, ear protection, protective gloves and safety
shoes during operations.
 Always work with concentration. Do proceed with consideration
and do not operate the tool when not fully concentrated.
For further safety instructions refer to the enclosure!
Mounting the core drill tool on
the
diamond drilling stand P-54190
Mounting the mounting plate
Dimensions of the motor unit
Use the turnstile to open
the locking device of the
mounting plate. Take it
out and connect it to the
core drill as described
below.
The drilling stand P-54190 comes with a
mounting plate, a 10 mm fitting key and 4
hexagon hollow head plugs M8. The
mounting plate is fixed on the tool with the
fitting key so that the coupling on the
mounting plate is on the same side as the
gear change of the engine. The 4 plugs are
then inserted and tightened.
Insert the core drill tool with the affixed mounting plate into the drilling stand
which must be firmly anchored on the surface. Lock it with the turnstile (see
page 18).

Power connection
The DBM 230 is a protection class I insulated machine. For protection
purposes the tool may only be operated with a GFCI. Therefore a GFCI-switch
is integrated in the cable for use in a safety plug with ground.

Caution!
- The GFCI safety switch must not be submerged in water.
- Do not use the GFCI switch for switching the tool on/off!
- Before operations check the proper functioning by pushing
the TEST-button.
First, check the correspondence of available voltage and frequency against the
data on the identification plate.
+6 - -10% voltage difference is permitted. Use only three-wire extension cable
with protective conductor and a sufficient cross-section (min. 2,5 mm2).
A cross section which is to small could lead to excessive power loss and to
overheating of the cable and the motor.
Recommended minimum cross section and cable lengths
Line voltage cross section in mm
2
1,5 2,5
110 V 20 m 40 m
230V 50 m 80 m
Water connection
If the drill bit is not sufficiently cooled with water, the diamond segments could
heat up which will damage and weaken them. Therefore you should always
make sure that the cooling system is not blocked. In order to provide the
drilling tool with water the following steps must be taken:
 Plug the tool to the water supply or a water pressure vessel via the
hose fitting.
 Ascertain that the tool is only operated with sufficient clean water as
otherwise the seals will get damaged when the tool is running dry.
 Caution: Water pressure must not exceed 3 bar.
 Make sure that the segments are cooled sufficiently. If the drilling
water is clear, cooling is adequate.
 If you want to enlarge a hole which you just drilled, close it in order to
achieve an adequate provision of cooling water.
 When working over-head, a water collecting ring must be used.
 Drain the water system when temperatures below the freezing point
are prognosticated.

Gear shifting
The DBM 230 is equipped with a mechanical 3-gears transmission in oil bath.
Adjust the rotation speed of the engine to the drill diameter (for details see
identification plate).
Turn the gear switch to a faster/slower gear until it arrests. Gears must only be
shifted when the engine is at stand-still. It may be necessary to support the
switching operation by slightly turning the lead screw.
Warning!
Never use force, shift gears only when the motor decelerates or is at stand-
still!
Do not use tools e.g. wrenches, hammers for gear shifting!
Changing the drill bit
Caution!
The tool is heavy and may heat up during operations or
sharpening. You could burn your hands, cut, tear or
squash yourself on the segments.
Before working on the equipment pull the power plug.
Raise the engine retainer with the core drill until it
arrests in the final position. Always wear protective
gloves when changing tools.
The drill spindle has a right-hand thread.
To retain the spindle use an open-end wrench 32mm on the drill spindle.
Never remove the drill bit by hitting it (with a hammer) as this will cause
damage to the core drill tool. Putting some waterproof grease on the drill
spindle thread and a copper ring placed between the spindle and the drill bit
will further facilitate the removal of the drill bit.
Operating the drill unit
In order to safely operate the tool, please observe the following notes:
Details to the work area
 Keep the work area free of everything which could obstruct operations.
 Provide for adequate illumination of the work area.
 Adhere to the regulations concerning the power supply.

 Install power lines in such a way that any damage by the drill can be
avoided.
 Make sure to always keep the work area in view and to be able to
reach all necessary operating elements and safety installations.
 Keep other persons away from your work area in order to avoid
accidents.
Space requirements for operations and maintenance
Keep a free space for operations and maintenance of about 2 m around the
drill, whenever possible, so that you can work safely and have immediate
access in case of a malfunction.
Drilling
Preparation
 When drilling into blocks make sure that they are well fixed and
fastened.
 Before drilling into load-bearing elements, make sure that the
foundation are not damaged. Follow the instructions of the specialists
responsible for the planning.
 Make sure not to damage gas or water pipes or power lines during
drilling.
 Make sure that the drill core will not hurt anybody or cause damage to
anything when falling out. Clear and secure the work area.
 When drilling through holes through ceilings, secure the area from
below, as the drill core may fall downwards.
 If the drill core could cause damage when falling down, set up a
construction to hold back the drill core.
 Make sure that the drill bit is fixed correctly.
 Use the correct tools appropriate for the material to be worked upon.
 Take care that the drill stand is attached firmly to the surface.
The following possibilities exist for mounting the P-54190:
Fixing the mount in concrete by means of dowels
For brickwork, expending
anchor must be used.
 Mark the position of the drill holes for
the fixing on the surface to be drilled.
 Drill a hole (Ø 15) 50 mm deep (A), into
which the dowel M12 (B) is to be
placed;insert the dowel and secure the
dowel with the doweling tool (C).

 Screw the quick action clamping screw
(D) into the dowel.
 Install the mount.
 Fix the washer (E) and finally the
fastening nut (F) on the quick action
clamping screw (D).
 Torque the fastening nut with a SW 27
wrench.
 Before and after tightening the nut (F) the
adjustable screws have to be adjusted.
Do check whether the mount is installed
safely and firmly.
Fixing the mount on the floor by vacuum
Do not use vacuum fixing on walls or over-head!
Vacuum fixing may only be used if the area to be drilled is level, free of
pinholes
and cracks, otherwise this method cannot be applied.
For the vacuum fixing you need the vacuum set P-54190, vacuum pump and -
hose. They are available on request.
Screw the plug-in nipple into
the foot plate, to which
previously seal strip has
been applied. Insert the
vacuum handle with the
seal.
Fasten the vacuum handle with a
washer and hexagon hollow head plug
M8x30.
Connect the drill mount and the vacuum pump. Bring the drill mount in the
correct position and switch the pump on.
Check whether all 4 levelling screws in the foot plate are completely turned
back and a vacuum of min. -0.8 bar is achieved. By pressing the valve button
on the handle the drill mount may be disengaged and readjusted.

The vacuum pump has to run during the complete operation, it is to be
placed in such a way that you can always observe the pressure gauge. It
is mandatory to check that the foot plate is firmly affixed before you start
drilling.
Fixing the mount by means of clamping device
In order to brace the drill mount by means of a clamping device, the
distance between the opposite wall must be between 1,7 m and 3 m.
Position the drill mount. Position the clamping device as close
as possible behind the column on the base of the mount. Fix
the mount by turning the crank (G) clockwise.
Secure the installation with the appropriate bolt (H).
Caution! The drill stand must be firmly connected to the surface.
Otherwise the operator might suffer injuries or the drill could be
damaged.
Uncontrolled movements during drilling will cause the drill bit to hit the
surface to be drilled, this may cause chipping of the segments. The drill
bit might also tilt in the borehole which will also damage it.
Execution of drilling
 Switch the GFCI to ON.
 Open the water supply.
 Switch the motor ON, the drill bit must not yet touch the surface.
 Lower the drill bit until it touches the surface.
 In order to achieve an exact centering of the drill bit, minimize the
forward travel of the drill bit during he first centimeter of cutting depth.
 Now you can increase the drilling speed to the correct speed for the
core bit in use. If the drilling speed is too high, the diamond segments
will become blunt in short time.
Inclined drilling
 Remove the bolt in the foot plate, which holds the column at a 90º
angle.
 Loosen the thumb screw between support and column and swivel the
column to the desired angle.
 Tighten the two bolts again.
 At the start of drilling, use low drill speed as only a portion of the drill
bit touches the surface. If the drill speed or pressure is too high the drill
bit may become erratic.

Overhead drilling
 You must install a water extracting device.
 Connect a wet vacuum to the extracting device and switch it on.
 Open the water supply and ensure that the water reaches the
segments before you start drilling.
 When drilling overhead take special care that no water enters into the
tool.
In case you notice during drilling that the advance speed becomes very slow,
that you have to employ increased pressure and that the water emerging from
the borehole is clear and mixed with metal splinters you probably have hit
reinforcement iron.
Reduce the pressure on the drill bit and switch to the next lower gear if
possible in order to separate it without problems. You may increase the
pressure, and the drill speed after separating the reinforcement.
Extension of the drill bit
If you have to drill deeper than the working length of the drill bit permits:
 At the outset, drill only as deep as the working length of the bit permits.
 Remove the drill bit and take the drill core out of the drilled hole
without moving the core drilling installation.
 Replace the drill bit into the drilled hole.
Install an appropriate extension between drill bit and motor. If the drill bit
holding fixture is 1¼ " do not forget to install the copper rings in order to
facilitate the loosening of the drill bit.

Overload Protection
In order to protect the operator, the motor and the drill bit, the DBM 230 is
equipped with mechanical, electronic and thermal overload protection.
Mechanical: If the drill bit is suddenly blocked in the borehole, a slip
clutch will disengage the drill bit from the motor.
Electronic: An LED is built into the housing in order to alert the operator
in case of excessive forward pressure. During no-load or
normal operations, there will be no indication. In case of
overload, the LED will give a red signal. In this case the tool
must be disengaged. If the red signal is disregarded for a
longer period of time, the tool will be switched of
automatically by the electronic device. After disengagement
and switching the tool switch to off and on again drilling may
continue.
Thermal: The motor is protected from destruction by a thermal
element in case of continuous overload. In this case, the
engine will stop automatically. It may be put back into
operations after a cooling period of approx. 2 min,
depending on the degree of overheating of the motor
winding and ambient temperature.
Safety clutch
The slip clutch is designed to absorb shocks and excessive loads. It is
designed as an auxiliary means and not an absolute protection. Therefore,
care must be taken during drilling. To maintain the operability, the clutch
should slip for max. 2 seconds. After excessive wear the clutch must be
exchanged by an authorized service point.
Do not loosen a jammed drill bit by switching the tool off and on. This
will cause a premature wear of the clutch.
Breaking of a segment
In case that a diamond segment, parts of the reinforcement or similar loosens
during drilling and the drill bit thereby gets jammed, stop working on this
borehole and drill a hole with the same center and a 15 to 20 mm greater
diameter.
Do not try to finish drilling with another drill bit of the same diameter!

After drilling
After you have finished drilling:
 Remove the drill bit from the borehole.
 Switch the motor off. Use the motor switch and not the GFCI for this
purpose.
 Close the water supply.
Removal of the bore core, in case it is stuck in the drill bit.
 Remove the drill bit from the motor.
 Put the drill bit in an vertical position.
 Slightly tap with the wooden handle of a hammer against the tube until
the bore core slides out. Never knock the drill bit forcefully against a
wall or treat it with tools like hammers or wrenches, the tube may
become deformed so that neither the bore core will loosen nor the drill
bit may be used again.
Removal of the bore core in a blind hole
Break off the core with a wedge or a lever. Remove the core with suitable
pliers or drill a hole into the core, insert a lifting screw and pull the core out.
Main
tenance and Care
Before doing any work on the machine, pull the mains plug!
Repairs may only be performed by qualified, trained and experienced
personnel.
After each repair the tool must be inspected by an electrical specialist.
Due to its design, the tool needs only a minimum of care and maintenance.
Nevertheless the following rules should be observed:
 Clean the core drill unit after finishing the drilling. Afterwards grease
the thread of the drill spindle. The air vents must always be open and
clean. Take care that while cleaning the tool no water enters into the
core drill tool.
 After the first 150 operating hours the transmission oil must be
exchanged. The oil exchange will greatly increase the life cycle of the
transmission.
 After approx. 200 operating hours the carbon brushes must be
inspected by an electrical specialist and replaced if necessary (only
use original carbon brushes).
Switches, cable and plug must be inspected regularly by an electrical
specialist.

In case of malfunctions
In case of malfunctions switch the tool off and pull the mains plug.
Repairs on the electric parts of the tool may only be performed by
an electrical specialist.
Troubleshooting
Malfunction
Possible cause
Repair
Tool does not
operate
- Line voltage
interrupted
- Power cable or plug
defective
- Switch defective
- Plug in other electric tool,
check function
- Have them checked by
specialist, replace if needed.
- Have it checked by
specialist,replace if needed
Motor runs- drill
bit does not turn
- Transmission
defective
- Have the tool repaired by an
authorized service point
Drilling speed
decreases
- Water pressure/water
throughput too high
- Drill bit defective
- Transmission
defective
- Drill bit polishes
- Regulate water throughput
- Check drill bit for damages,
exchange if needed
- Have the tool repaired by an
authorized service point
- Sharpen drill bit on oilstone
with water flushing running
Motor switches
off
- Engine stops
- Tool overheated
Overload protection
activated
- Hold tool in a straight
position
- Disengage tool and put it
backto operations by
activiting theswitch
Water leaks from
transmission
housing
- Gland rings defective - Have the tool repaired by an
authorized service point