Baier BDS 125 N User manual

Instruction Manual
BAIER
Wet Concrete Cutter / Chaser
BDS 125 N
Maschinenfabrik
OTTO BAIER GmbH
Heckenwiesen 26
D-71679 Asperg
Tel. [phone]
Fax [phone]
[email protected]
www.baie
r
-tools.com

2
Contents
Contents.................................................................................................................................... 2
Important Information.............................................................................................................. 2
Pictograms................................................................................................................................ 3
Explanation of the pictograms on the wet concrete cutter / chaser........................................ 3
Explanation of the pictograms used in the text....................................................................... 3
For your Safety......................................................................................................................... 4
General safety instructions for power tools ................................................................................ 4
1) Safety at the place of work .............................................................................................. 4
2) Electrical safety ............................................................................................................... 4
3) Safety of people............................................................................................................... 5
4) Use and handling of the power tool ................................................................................. 5
5) Service............................................................................................................................. 6
Machine-Specific Safety Instructions ..................................................................................... 6
Operating personnel requirements .................................................................................. 6
Workplace safety ............................................................................................................. 6
Electrical safety................................................................................................................ 7
Safety of people ............................................................................................................... 8
Hazards when using and handling the power tool ........................................................... 9
Service / maintenance / repair ....................................................................................... 11
Technical Characteristics...................................................................................................... 12
Technical specifications ....................................................................................................... 12
Machine characteristics........................................................................................................ 12
Scope of Supply..................................................................................................................... 12
Intended Use........................................................................................................................... 12
Machine Parts and Controls.................................................................................................. 13
Tools and Accessories.......................................................................................................... 13
Before Starting Work ............................................................................................................. 14
Adjusting the front handle..................................................................................................... 15
Check personal protection switch......................................................................................... 15
Operation and Control........................................................................................................... 16
Fitting or changing grinding discs......................................................................................... 16
Adjusting the cutting depth ................................................................................................... 17
Connecting the dust and/or water extractor ......................................................................... 17
Adjust water supply .............................................................................................................. 18
Switching on the wet concrete cutter / chaser and cutting ................................................... 18
Finish cutting process........................................................................................................... 19
Cleaning.................................................................................................................................. 20
Maintenance............................................................................................................................ 20
Declaration of Conformity..................................................................................................... 20
Warranty.................................................................................................................................. 21
Important Information
Before starting any work with or on the machine, this instruction manual, the
safety instructions and the warnings must be read through carefully and ob-
served.
Always store this instruction manual together with the machine.

3
Pictograms
Explanation of the pictograms on the wet concrete cutte
r
/
chase
r
The CE mark on a product means that the product conforms with all the applicable
European regulations and has been subjected to the prescribed conformity assessment
procedures.
Environmentally friendly disposal of waste equipment
Waste equipment contains valuable recyclable materials which should be reused or
recycled. Batteries, lubricants and similar materials must not be allowed to get into the
environment.
Therefore, please dispose of waste equipment through suitable collection systems.
Explanation of the pictograms used in the text
Danger!
This symbol means a direct pending danger or risk to the life and health of people of a
general nature. Failure to note and follow these instructions results in severe health
effects, through to life-threatening injuries.
►This arrow indicates the appropriate precaution to you in order to avert the danger.
Danger due to electricity!
This symbol means a direct pending danger or risk to the life and health of people due
to electricity. Failure to note and follow these instructions results in severe health
effects, through to life-threatening injuries.
►This arrow indicates the appropriate precaution to you in order to avert the danger.
Caution!
This symbol indicates a potentially dangerous situation. Failure to comply with these
instructions can result in minor injuries or damage to property.
►This arrow indicates the appropriate precaution to you in order to avert the danger.
Please note!
This information provides you with recommendations for use and useful tips.

4
For your Safety
General safety instructions for power tools
WARNING
Read all the safety instructions and precautions.
Failure to observe the safety instructions and precautions can result in electric shock, fire
and/or serious injuries.
Keep all safety instructions and precautions for future reference.
The term “power tool” used in the safety instructions refers to mains-operated power tools
(with mains power lead) and battery-operated power tools (without mains power cable).
1) Safety at the place of work
a) Keep your work area clean and well illuminated.
Untidiness and unlit work areas can result in accidents.
b) Never use the power tool in potentially explosive environments containing
flammable liquids, gases or dusts.
Power tools generate sparks which can ignite dust or vapours.
c) Keep children and other persons away from the power tool during use.
A moment’s distraction can cause you to lose control of the machine.
2) Electrical safety
a) The connecting plug of the power tool must fit into the plug socket. The plug
must not be modified in any way. Do not use adapter plugs in conjunction
with power tools with protective earth conductor.
Unmodified plugs and properly fitting plug sockets reduce the risk of electric shock.
b) Avoid physical contact with earthed surfaces such as pipes, heaters, cookers
and refrigerators.
There is an increased risk of an electric shock if your body is earthed.
c) Keep power tools away from rain and moisture.
The ingress of water into a power tool increases the risk of an electric shock.
d) Do misuse the cable in any way by using it to carry or hang up the power tool
or to pull the plug out of the socket. Keep the cable away from heat, oil, sharp
edges and moving machine parts.
Damaged or kinked cables increase the risk of an electric shock.
e) When working with a power tool outdoors, use only extension leads that are
suitable for outdoor use.
Use of an extension lead suitable for outdoor use reduces the risk of electric shock.
f) If the use of the power tool in a damp environment is unavoidable, use a
residual-current circuit breaker.
Use of a residual-current circuit breaker (RCCB with 10 mA maximum tripping cur-
rent) reduces the risk of an electric shock.

5
For your Safety
3) Safety of persons
a) Always work carefully, attentively and sensibly when using a power tool. Do
not use power tools if you are tired or are under the influence of drugs, alco-
hol or medication.
A moment of inattention while using the power tool can result in serious injuries.
b) Wear personal protective equipment and always wear goggles.
Use of personal protective equipment, such as dust mask, non-slip safety shoes,
helmet or ear protectors, depending on the type and application of the power tools,
reduces the risk of injuries.
c) Avoid accidental switching on of the power tool. Ensure that the power tool is
switched off before connecting it to the mains power supply and/or connect-
ing the battery and before picking up or carrying the tool.
If you have your finger on the switch when carrying the power tool or you connect
the tool to the power supply when it is switched on, this can lead to accidents.
d) Remove the adjusting tools or wrenches before switching on the power tool.
A tool or wrench in a rotating part of the tool can result in injuries.
e) Avoid abnormal postures when working. Ensure you are standing firmly and
maintain your balance at all times.
This will enable you to control the power tool better in unexpected situations.
f) Wear suitable clothing. Do not wear loose clothing or jewellery. Keep your
hair, clothing and gloves away from moving parts.
Loose clothing, jewellery and long hair can get caught in moving parts.
g) If dust extraction and collection devices can be installed, ensure that these
are connected and are used correctly.
Use of a dust extraction system can reduce the hazards caused by dust.
4) Using and handling the power tool
a) Do not overload the tool. Use the appropriate power tool intended for your
work.
You work better and safer within the given power range if you use a suitable power
tool.
b) Do not use a power tool whose switch is defective.
A power tool which can no longer be switched on or off is dangerous and must be
repaired.
c) Remove the plug from the plug socket and/or remove the battery before carry-
ing out tool adjustments, changing accessories or placing the tool aside.
This precautionary measure prevent unintentional starting of the power tool.

6
For your Safety
d) Store power tools out of the reach of children when not in use. Do not allow
people to use the tool unless they are familiar with it, or if they have not read
this instruction manual.
Power tools are dangerous if they are used by inexperienced people.
e) Maintain power tools with care. Check whether moving parts are in proper
working order and do not jam, whether parts are broken or damaged in such a
way that they impair the function of the power tool. Have damaged parts re-
paired before using the tool.
Many accidents are caused by poorly serviced and maintained power tools.
f) Keep cutting tools sharp and clean at all times.
Carefully maintained cutting tools with sharp cutting edges jam less easily and are
easier to control.
g) Use the power tool, accessories, insert tools/bits, etc. in accordance with this
instruction manual. Take into consideration the working conditions and the
work to be carried out.
Use of power tools for any purpose other than the intended uses can lead to dan-
gerous situations.
5) Service
a) Have your power tool repaired only by qualified personnel and only using orig-
inal spare parts.
This will ensure that the safety of the power tool is maintained.
Machine-Specific Safety Instructions
 Operating personnel requirements
People below the age of 18 may not use the machine.
 Workplace safety
Secure the work area behind holes (in walls, etc.) you are cutting too.
Unsecured work areas can put you and other people at risk.
Watch out for open and concealed electricity cables, and water and gas pipes.
Use suitable detectors to find concealed utility pipes and cables, or contact
the local utility company for advice.
Contact with electricity cables can cause fires and an electric shock. Damage to a
gas pipe can cause an explosion. Penetrating a water pipe causes damage to prop-
erty or could cause an electric shock.
Secure the workpiece.
A workpiece securely held in clamping devices or a vice is more safely held than in
the hand.
Avoid dust accumulation in the workplace.
Dusts can easily ignite.

7
For your Safety
Ensure adequate ventilation in closed rooms.
Risk due to dust emission and visual impairment.
Dust from materials such as coatings containing lead, several types of wood,
minerals and metals can be harmful to health and cause allergic reactions,
respiratory diseases and/or cancer.
Asbestos-containing material may only be machined by specialists.
−Wherever possible, use a dust extractor suitable for the material you are working
on (e.g. a special BAIER dust extractor).
−Ensure the workplace is properly ventilated.
−We recommend wearing a face mask respirator with filter class P2 or P3 (to EN
149:2001).
Observe the relevant regulations in your country for the materials to be machined.
Do not use the power tool near flammable materials.
Sparks could ignite these materials.
Avoid causing situations where other people can stumble or trip.
Tripping over cables can cause serious injuries.
Electrical safety
The power tool may only be used for wet cutting and / or chasing if operated
with a perfectly functioning PRCD personal protection switch (see page 15).
Before starting up the power tool you must ensure that a perfectly functioning
protective earth (PE) conductor is available.
Check the power tool, connection cable and plug for damage before each use.
A damaged machine is dangerous and no longer safety to operate.
Note the mains voltage! The power source voltage must match the details
given on the rating plate of the power tool.
If using the power tool with a mobile generators, loss of power or atypical be-
haviour on switching on is possible.
Do not use the power tool if the cable is damaged. Do not touch the damaged
cable and disconnect the mains plug if the cable is damaged while you are
working.
Damaged cables increase the risk of an electric shock.
Only use extension cables, which are suitable for the machine's power con-
sumption and have a minimum cross-section of 1.5 mm2. If you use a cable
drum, always completely unwind the cable.
The rolled up cable can heat up and start to burn.
Regularly clean the ventilation slots of your power tool by blowing it out.
Never use liquids. Never insert screwdrivers or any other objects into the ven-
tilation slits. Do not cover the ventilation slits.
The motor fan draws dust into the housing and a large accumulation of metal dust
can cause electrical hazards.

8
For your Safety
External electromagnetic interference (e.g. mains voltage fluctuations, elec-
trostatic discharges) can cause the power tool to switch off automatically.
In this case, switch off the power tool and then switch it back on again.
Before use, check all water-carrying parts – including those of the accesso-
ries – for perfect working order and leaks.
Leaking water increases the risk of an electric shock.
Safety of people
Wear personal protective equipment and, depending on the work situation,
use:
full-face protection, eye protection or safety glasses/goggles,
hard hat and special apron
Protect yourself against debris thrown up by wearing a hard hat, safety
goggles or face protection and wear an apron, if necessary.
Hearing protection
The typical A-weighted sound pressure level of this power tool is over
85 dB (A) while working with the tool.
If you are exposed to loud noise for lengthy periods, there is a risk of
hearing damage or even hearing loss.
Dust mask, half-face filter mask or face mask respirator
Inhaling fine mineral dust can cause health damage. We recommend
wearing a face mask respirator with filter class P2 or P3 (to EN
149:2001).
When working with the concrete cutter / chaser, very fine and toxic
dusts can be produced, which are bound by the added water. If the
used water with the bound dust is not extracted the bound dust is re-
released after drying. When cutting materials containing quartz there
therefore is a very high risk of silicosis; the machine should therefore
only be used in conjunction with a suitable water extractor (e.g. a
special BAIER dust extractor).
Anti-vibration safety gloves
At a release value A (8) for arm-hand vibrations of over 2.5 m/s2, the
wearing of anti-vibration safety gloves is recommended.
Vibrations can cause health damage.
Non-slip safety footwear
Ensure other people keep a safe distance from your work area. Any person
entering the work area must be wearing personal protective equipment.
Broken pieces of the workpiece or broken insert tools can fly off and cause injuries,
even outside the immediate work area.

9
For your Safety
Hold the tool at the insulated gripping surfaces only when carrying out work
during which the insert tool can hit concealed electricity cables or the tool's
own mains power lead.
Contact with a live conductor can also energise metal parts of the tool and cause an
electric shock.
Keep the mains power lead away from rotating insert tools.
If you lose control of the tool, the mains power lead can be cut or caught and your
hand or arm can be pulled into the rotating tool.
Never put down the power tool until the insert tool has come to a complete
standstill.
The rotating insert tool can come into contact with the surface on which the power
tool is placed, which could cause you to lose control of the power tool.
Do not leave the power tool running while you are carrying it.
Your clothing can get caught by inadvertent contact with the rotating insert tool and
the insert tool can drill into your body.
If the machine is switched on, do not direct insert tools towards your own or
other people's bodies. Do not touch or take hold of the tools.
Unlock the ON/OFF switch and move it into the OFF position if the power
supply is interrupted, e.g. due to power failure or disconnecting the mains
plug.
This prevents uncontrolled restarting.
Hazards when using and handling the power tool
The concrete cutter / chaser may only be used with the guard plate fitted.
This power tool is not suitable for sanding with sandpaper, working with wire
brushes, polishing and abrasion friction cutting (cutting-off).
Using the power tool for purposes for which it is not intended can cause hazards
and injuries.
Do not use any accessories. which have not been especially provided and
recommended for this power tool by the manufacturer.
Just because you can attach the accessories to your power tool is not a guarantee
of safe use.
The allowable speed of the insert tool must be at least as high as the maxi-
mum speed given on the power tool.
Accessories which rotate faster than approved can break and fly off the tool.
Change insert tools carefully and only use the mounting tools provided, if
they are in perfect condition. Disconnect the mains plug before changing the
insert tool.
Use of the mounting tool provided prevents damage to the power tool and insert
tool.
Always use undamaged installation material of the correct size for the grind-
ing disc chosen by you.
Suitable installation material supports the grinding disc and therefore reduces the
risk of the grinding disc breaking.

10
For your Safety
Grinding discs, installation material (flanges) and other accessories must
precisely fit on the spindle of your power tool.
Cutting tools which do not precisely fit on the spindle of the power tool rotate irregu-
larly, vibrate severely and can result in loss of control.
After attaching the grinding disc, before switching on, check that the grinding
disc is correctly fitted and can rotate freely. Ensure that the grinding disc
does not touch the protective hood or other parts.
Never use damaged insert tools. Before each use, check insert tools for splin-
ters and cracks. If the power tool or insert tool is dropped or falls, check
whether it is damaged, or use an undamaged insert tool. If you have checked
and inserted the insert tool, keep yourself and other people nearby outside
the plane of the rotating insert tool and let the power tool run at maximum
speed for one minute.
Most damaged insert tools break during this test period.
Do not expose power tools to extreme heat and cold.
Mechanical and electrical damage can occur during extreme heat and/or cold.
Allow the insert tools, tool holders and other parts cool in the immediate
vicinity of the work area after use.
The machines can be very hot after use, do not touch the parts, risk of injuries.
Additional signs or other, non BAIER-specific parts may not be screwed or
riveted onto the motor, handle, gearbox or protective housing.
This could damage the power tool and cause malfunctions.
Avoid unnecessary noise emissions.
Note and follow the safety and work instructions for the accessories used.
Kickback and relevant safety instructions
Kickback is the sudden reaction caused by a rotating insert tool, such as the grind-
ing disc, that gets caught or is blocked. Catching or blocking results in abrupt stop-
ping of the rotating insert tool. This causes an uncontrolled power tool to be accel-
erated against the direction of rotation of the insert tool at the blocking point.
For example, if a grinding disc gets stuck in the workpiece or becomes blocked, the
edge of the grinding disc that is immersed in the workpiece, can get caught and
therefore break out the grinding disc or cause kickback. The grinding disc then
moves towards or away from the person using the tool, depending on the direction
of rotation of the grinding disc at the blocking point. At the same time, grinding discs
can also break.
Kickback is the consequence of incorrect or faulty use of the power tool. It can be
prevented by taking suitable precautions, as described in the following.

11
For your Safety
When switching on and while working with the power tool, hold onto it tightly
at both handles and place your body and arms in a position in which they can
absorb the kickback forces or reaction torque on starting up. Always put the
machine down firmly on both rollers.
The person using the tool can control the kickback and reaction forces by taking
suitable precautions.
Never place your hand near rotating insert tools.
The insert tool can move across your hand during kickback.
Keep your body clear of the area in which the power tool would move in the
event of kickback.
The kickback drives the power tool in the opposite direction to the movement of the
grinding disc at the blocking point.
Take particular care when working in the area of corners, sharp edges, etc.
Prevent insert tools from rebounding from or jamming in the workpiece.
The rotating insert tool tends to get stuck in corners, sharp edges or if it rebounds.
This causes loss of control or kickback.
Service / Maintenance / Repair
Have the power tool checked if it has been dropped or become wet.
A possibly damaged power tool is dangerous and no longer safe to operate. Before
using the power tool again, have it checked by our customer service or an author-
ised service centre of Maschinenfabrik OTTO BAIER GmbH.
Repair and maintenance work may only be carried out by an authorised ser-
vice centre of Maschinenfabrik OTTO BAIER GmbH.
Otherwise, all liability and warranty claims against Maschinenfabrik OTTO BAIER
GmbH expire.
Ensure that original BAIER spare parts and original BAIER accessories only
are used when needed.
Original parts are available from authorised dealers. Use of non original parts can
cause damage to the machine and an increased risk of accidents.
Regular servicing by Maschinenfabrik OTTO BAIER GmbH or a servicing and
repair company authorised by us is specified.
Many accidents are caused by poorly serviced and maintained power tools.

12
Technical Characteristics
Technical specifications
Wet concrete cutter / chaser
type
BDS 125 N
Operating voltage (V / Hz) ~230 / 50/60
Power consumption (watt) 1600
Protection class one / I
Torque (Nm) 2.3
Speed (min-
1
) 8500
Diameter of the cutting discs (mm) 125
Cutting depth (mm) 0 – 7
Weight (kg)* 4.9
L
pA
(sound pressure) dB (A) ** K = 3 dB 91
LW
A
(sound power) dB (A) ** 101
Vibration measurement (m/s
2
)** K = 1.5 m/s
2
3.8
* Weight according to EPTA procedure 01/2003.
** Noise and vibration values to EN 60745.
Machine characteristics
The wet concrete cutter / chaser is equipped with startup electronics and overload
protection to protect the user and the machine. A connection for effective dust and
water extraction with BAIER's special dust extractor is provided as a standard feature.
The wet concrete cutter / chaser has a personal protection switch (PRCD).
Scope of Supply
Please refer to the enclosed delivery note for the individual scope of supply of a cus-
tomer-specific order.
Please refer to the table below for the scope of supply of basic models. Please contact
your dealer if parts are missing or damaged.
Wet Concrete
Cutter / Chaser
Basic model
ID. No. Wet Concrete
Cutter / Chaser Metal transport case
with tools
Guard plate
BDS 125 N 72611 x x x
x = included in scope of supply
Intended Use
Provided it is fitted with the appropriate grinding disc for the material to be machined,
the BDS 125 N wet concrete cutter / chaser is suitable for the following uses:
• for cleaning and smoothening hard surfaces,
• for removing formwork joints and slurry skins in concretework,
• for removing joint residues in tile renovation work,
• for cutting off residual paint and old coatings,
• for cutting off concrete and plaster or rendering.

13
Machine Parts and Controls
1 Connection cable
2 Handle
3 ON / OFF switch
4 Water connection with stopcock and Gardena coupling
5 Socket for dust extractor hose connection
6 Cap
7 Star knob screw
8 Face pin wrench
9 Guard plate (for cutting / chasing near corners)
10 Front handle
11 Spindle lock button
12 Personal protection switch PRCD
Tools and Accessories
• Metal transport case for BDS 125 N ID No. 67942
• BAIER guard plate for BDS 125 N ID No. 71464
• BAIER water pressure vessel ID No. 60723
• Regrinding plate for regrinding the diamond grinding disc ID No. 15453
• BAIER special dust extractor see catalogue
BAIER grinding disc Area of use ID No.
Diamond grinding disc FW Fine abrasion on soft surface. 67884
Diamond grinding disc FH Fine abrasion on hard surface. 67892
Diamond grinding disc GW Coarse abrasion on soft surface. 67900
Diamond grinding disc GH Coarse abrasion on hard surface. 67918

14
Before Starting Work
Note and follow the following points before each deployment to ensure safe working
with the wet concrete cutte
r
/ chaser:
• Read through all safety instructions and warnings in this instruction manual.
• Check whether the voltage on the rating plate is identical with the mains voltage.
• Before each use, check the machine, connection cable, plug and tight fit of the grind-
ing disc.
• Connect a suitable water supply (e.g. BAIER water pressure vessel, see Tools and
Accessories, page 13).
• Connect a suitable dust/water extractor for wet cutting and chasing (e.g. BAIER
special dust extractor, see Tools and Accessories, page 13).
• The wet concrete cutter / chaser may only be used, either if a dust extractor is con-
nected (see also next point) or if the socket for connection of the dust extractor hose
is closed off with a cap.
• If materials that produce harmful dusts are cut (e.g. quartz sand, lead-containing
paint pigments, etc.), a suitable dust / water extractor (e.g. BAIER special dust ex-
tractor) must be connected to the wet concrete cutter / chaser.
• Wear protective clothing such as hard hat, hearing protection or safety goggles,
safety gloves and if necessary an apron.
• Use only BAIER grinding discs to ensure adequate safety.
• Danger!
Risk of injuries caused by breaking off of the cutting edges of the grinding disc.
►Only use grinding discs, whose approved speed is at least as high as the highest
no-load speed of the wet concrete cutter / chaser, and follow the manufacturer's
instruction on fitting and using the grinding discs.
• Only use the grinding discs recommended by Maschinenfabrik OTTO BAIER GmbH
for the respective use (see table on page 13).
• Please note!
We can only guarantee the machine's full performance if it is used with the BAIER
dust extractor.
• Danger!
Risk of fire if cable drums used.
►If cable drums are used, ensure the cable is completely unwound. The rolled up
cable can heat up and start to burn.

15
Before Starting Work
Adjust the front handle (Figure 1)
Figure 1
To enable comfortable handling of the machine, the tilt of the front handle (1) can be
adjusted.
• Use the Allen key SW8 to undo the two hex socket cap screws (1).
• Adjust the handle (2).
• Re-tighten both hex socket head cap screws (1).
Check the personal protection switch (Figure 2)
• Danger!
Risk of fatal injuries due to a defective PRCD personal protection switch.
►The personal protection switch PRCD must be checked each time before the wet
concrete cutter / chaser is started (see below). If the PRCD does not trip during
the test or if it repeatedly switches off when the wet concrete cutter / chaser is
switched on, the wet concrete cutter / chaser together with the PRCD personal
protection switch must be examined by a qualified electrician.
Figure 2
– If the mains plug is plugged in and the wet concrete cutter / chaser is switched off,
press the - ON−button (RESET) (2). The red indicator light (1) must light up.
– Press the −OFF−button (TEST) (3). The PRCD must switch off, i.e. the red indi-
cator light (1) goes out.
– Press the −ON−(RESET) button (2) again. The wet concrete cutter / chaser must
now be able to be switched on.
– If the PRCD does not trip during the test or if it repeatedly switches off when the
wet concrete cutter / chaser is switched on, the wet concrete cutter / chaser to-
gether with the PRCD personal protection switch must be examined by a qualified
electrician.
– It is not permitted to operate the wet concrete cutter / chaser with a defec-
tive personal protection switch PRCD – risk of loss of life.
ON
RESET
OFF
TEST

16
Operation and Control
Fit or replace wet grinding disc (Figure 3)
Choose a grinding teller suitable for the material to be machined and the required
abrasion (see table on page 13).
Danger!
Risk of fatal injuries due to electric shock.
►Disconnect the mains plug before carrying out any work on the wet concrete cutter /
chaser.
Danger!
Risk of injury due to hot grinding disc.
►The grinding disc can get hot if used for a lengthy time. Wear safety gloves when
you change the hot grinding disc or allow the grinding disc to cool first.
Figure 3
• Wait for the machine to come to a complete standstill before pressing the spindle
lock button (4).
• Press the spindle lock button (4), and at the same time turn the grinding disc (1) until
the spindle lock button latches into the drive shaft.
• Keep the spindle lock button (4) pressed and use the face pin wrench (2) to undo the
flange nut (3).
• Remove the grinding disc (1) and replace it with a new one.
• Screw on the flange nut (3) while the drive shaft is locked and use the face pin
wrench (2) to tighten the nut moderately.
• Check the fit and condition of the grinding disc. A damaged grinding disc may not be
used and must be replaced immediately.
• Danger!
Risk of injuries due to cracking of the grinding disc (thrown up / flying parts), caused
by damaged, untrue running or vibrating grinding discs.
►During the trial run of the machine, hold the grinding disc away from your body
and do not touch or grip it.
• Start the wet concrete cutter / chaser and perform a trial run without load for 5 to 10
seconds.

17
Operation and Control
Adjust cutting depth (Figure 4)
Figure 4
• The cutting depth can be changed adjusting the height of the guard plate (2). Undo
the three star knob screws (1). Set the required depth by turning the guard plate and
re-tighten the three star knob screws (1).
•Please note!
The best cutting and chasing results are achieved if the guard plate is set so that
only a small amount of material is removed.
Connect dust and/or water extracto
r
(Figures 5 and 6)
Figure 5 Figure 6
• Danger!
Fine and toxic dust is harmful.
►If materials that produce harmful dusts are cut (e.g. quartz sand, lead-containing
paint pigments, etc.), a suitable dust / water extractor (e.g. BAIER special dust
extractor) must be connected to the wet concrete cutter / chaser.
• Remove the cap (2) on the socket (1).
• Check the dust extractor is working properly and then push the dust extractor hose
(3) firmly onto the socket (1).
• The socket (1) is designed for the suction hose of all BAIER special dust extractors.
•Please note!
Greater effort may be required to push on the suction hose in cold ambient tempera-
tures.

18
Operation and Control
Adjust water supply (Figure 7)
Figure 7
• Danger!
Risk of injury due to electric shock.
►Protect the machine against water splashes. When inserting and removing the
water hose, ensure that no water penetrates the air slits of the machine. Use in-
tact Gardena couplings and Gardena hose lengths only. Check the sealing rings
for wear or damage. The drill may not be run with leaking hose couplings.
• Connect the water supply (1) with coupling (3) to a hose with a Gardena hose fitting
(½ inch).
• Use the tap (2) to regulate the water supply.
• Set the water flow rate as low as possible to avoid the risk of splashing/spraying (see
above). A medium strength water jet suffices.
• In general, ensure free water run-off for wet cutting and chasing. Avoid any water
back-up.
Switch on wet concrete cutter / chaser and cut / chase (Figure 8)
Figure 8
• Always hold the wet concrete cutter / chaser cutter firmly with both hands on the
handles (1 and 3).
• Switch on the wet concrete cutter / chaser; to do this, press the ON / OFF switch (2)
and wait until the machine has reached its full speed.

19
Operation and Control
• Carefully position the wet concrete cutter / chaser on the surface to be machined.
• The surface is machined with circular or linear movements, while the wet concrete
cutter / chaser is guided over the surface to be machined with only a moderate pres-
sure.
Cutting / chasing along a wall and near a corner (Figure 9)
Figure 9
The handle (1) can be folded up for cutting or chasing near corners (see Figure 1,
page 15).
End the cutting / chasing work (Figure 7 and Figure 8, page 18)
• Danger!
Risk of injury due to continued running of the grinding disc after the concrete cutter /
chaser has been switched off.
►Always hold the grinding disc away from your body and wait for it to completely
stop before putting down the wet concrete cutter / chaser.
The wet concrete cutter / chaser switches off as soon as the ON / OFF switch (2) is
released (Figure 8, page 18). Do not put down the wet concrete cutter / chaser until
the grinding disc has stopped.
After wet cutting / chasing:
• Turn off the water supply. Uncouple the machine from the supply hose. Completely
open the tap (3) and allow the water to completely discharge (Figure 7, page 18).

20
Cleaning
Danger!
Risk of fatal injuries due to electric shock.
►Disconnect the mains plug before carrying out any work on the wet concrete cutter /
chaser.
The machine must be cleaned after each cutting work session.
• Carefully clean the machine and blow out with compressed air.
• Ensure handles are dry and free of grease.
Maintenance
Danger!
Risk of fatal injuries due to electric shock.
►Disconnect the mains plug before carrying out any work on the wet concrete cutter /
chaser.
The wet concrete cutter / chaser must be serviced at least once a year. Further, servic-
ing will be necessary depending on the wear of the carbon brushes.
Only servicing and repair firms authorised by Maschinenfabrik OTTO BAIER GmbH
may carry out maintenance of the machine. Also ensure that original BAIER spare
parts and original BAIER accessories only are used.
Declaration of Conformity
We herewith declare, with sole responsibility, that this product conforms with the follow-
ing standards or normative documents:
EN 60745
in accordance with the provisions of the Directives
2006/42/EC
7 July 2011
Maschinenfabrik OTTO BAIER GmbH,
Heckenwiesen 26,
D-71679 Asperg