Optimum OPTImill MH 50G User manual

GB
OPTIMUM
MASCHINEN - GERMANY
Operating Manual
Version 1.0.1
Milling machine
MH50G
Part no. 3338180
Part no. 3338185

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 2 Translation of the original instructions
MH50G│MH50VGB
Table of contents
1 Safety
1.1 Type plates ...............................................................................................................................................6
1.2 Safety instructions (warning notes)...........................................................................................................7
1.2.1 Classification of hazards ...............................................................................................................7
1.2.2 Other pictograms...........................................................................................................................7
1.3 Intended use .............................................................................................................................................8
1.4 Reasonably foreseeable misuse...............................................................................................................9
1.4.1 Avoiding misuse ............................................................................................................................9
1.5 Possible dangers posed by the milling machine.....................................................................................10
1.6 Qualification ............................................................................................................................................11
1.6.1 Private Users...............................................................................................................................11
1.6.2 Obligations of the User................................................................................................................11
1.6.3 Craftsman or industrial use .........................................................................................................11
1.6.4 Authorized personnel ..................................................................................................................12
1.6.5 Operator's obligations..................................................................................................................12
1.6.6 Obligations of the operator ..........................................................................................................12
1.6.7 Additional requirements regarding qualification ..........................................................................13
1.7 User positions .........................................................................................................................................13
1.8 Safety measures during operation..........................................................................................................13
1.9 Safety devices ........................................................................................................................................13
1.9.1 Emergency stop button ...............................................................................................................14
1.9.2 Lockable master switch ...............................................................................................................14
1.9.3 Stored charge on MH50V............................................................................................................14
1.9.4 Separation guard.........................................................................................................................15
1.10 Safety check ...........................................................................................................................................15
1.11 Personal protective equipment ...............................................................................................................16
1.12 For your own safety during operation .....................................................................................................16
1.13 Switching-off and securing the milling machine......................................................................................16
1.13.1 Lockable main switch ..................................................................................................................16
1.14 Using lifting equipment ...........................................................................................................................17
1.15 Symbols on the milling machine .............................................................................................................17
1.16 Electronics ..............................................................................................................................................17
1.17 Inspection deadlines...............................................................................................................................17
2 Technical data
2.1 Electrical connection...............................................................................................................................18
2.2 Milling capacity .......................................................................................................................................18
2.3 Spindle seat............................................................................................................................................18
2.4 Drill-mill head ..........................................................................................................................................19
2.5 Cross table..............................................................................................................................................19
2.6 Dimensions .............................................................................................................................................19
2.7 Work area ...............................................................................................................................................19
2.8 Speeds....................................................................................................................................................19
2.9 Environmental conditions........................................................................................................................19
2.10 Operating material ..................................................................................................................................20
2.11 Emissions ...............................................................................................................................................20
2.12 Tools and tool holding fixtures ................................................................................................................21
3 Unpacking and connecting
3.1 Unpacking the machine ..........................................................................................................................22
3.2 Transport ................................................................................................................................................22
3.3 Installation and assembly .......................................................................................................................22
3.3.1 Installation site requirements.......................................................................................................22
3.3.2 Load suspension point ................................................................................................................23

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 3Translation of the original instructions
MH50G│MH50V GB
3.3.3 Assembly..................................................................................................................................... 23
3.4 Dimensions, balance point ..................................................................................................................... 24
3.5 Mounting on the optionally available machine base............................................................................... 26
3.6 First commissioning................................................................................................................................ 27
3.7 Cleaning and lubrication......................................................................................................................... 28
3.8 Electrical connection .............................................................................................................................. 28
3.8.1 MH50G and MH50V.................................................................................................................... 28
3.8.2 MH50V ........................................................................................................................................ 29
3.8.3 Regulated drives in connection with residual current devices..................................................... 30
3.8.4 Protection from Dangerous Shock Currents, use of ELCBs ....................................................... 30
3.8.5 Current in the protective earth conductor - Leakage current....................................................... 30
3.8.6 When the ELCB triggers ............................................................................................................. 31
4Operation
4.1 Control and indicating elements ............................................................................................................. 32
4.1.1 Control panel............................................................................................................................... 33
4.2 Safety ..................................................................................................................................................... 34
4.3 Switching the milling machine on ........................................................................................................... 34
4.4 Switching the milling machine off ........................................................................................................... 34
4.5 Resetting an emergency stop situation .................................................................................................. 34
4.6 Power failure, Restoring readiness for operation ................................................................................... 34
4.7 Speed setting ......................................................................................................................................... 34
4.7.1 Selecting the speed..................................................................................................................... 34
4.7.2 Gear stage .................................................................................................................................. 35
4.8 Direction of spindle rotation.................................................................................................................... 35
4.9 Feed ....................................................................................................................................................... 35
4.10 Spindle quill feed .................................................................................................................................... 36
4.10.1 Setting the drilling or tapping depth............................................................................................. 36
4.11 Tapping .................................................................................................................................................. 36
4.12 Milling head rapid traverse ..................................................................................................................... 37
4.13 Inserting or Removing Tool .................................................................................................................... 37
4.13.1 Inserting ...................................................................................................................................... 37
4.13.2 Removing.................................................................................................................................... 38
4.14 Clamping the workpieces ....................................................................................................................... 38
4.14.1 Calculation of the Cutting Forces or Necessary Holding Force when Milling.............................. 39
4.15 Swivelling the milling head ..................................................................................................................... 39
5 Maintenance
5.1 Safety ..................................................................................................................................................... 40
5.1.1 Preparation.................................................................................................................................. 40
5.1.2 Restarting.................................................................................................................................... 40
5.2 Inspection and maintenance .................................................................................................................. 40
5.3 Repair..................................................................................................................................................... 43
5.3.1 Customer service technician....................................................................................................... 43
6 Ersatzteile - Spare parts
6.1 Fräskopf - Milling head 1 - 4................................................................................................................... 44
6.2 Fräskopf - Milling head 2 - 4.................................................................................................................. 45
6.3 Fräskopf - Milling head 3 - 4................................................................................................................... 46
6.4 Fräskopf - Milling head 4 - 4................................................................................................................... 47
6.5 Säule - Column 1 - 2 .............................................................................................................................. 48
6.6 Säule - Column 2 - 2 .............................................................................................................................. 49
6.7 Kreuztisch - Cross table 1 - 2 ................................................................................................................. 50
6.8 Kreuztisch - Cross table 2 - 2 ................................................................................................................. 51
6.9 Schutzeinrichtung - Protection device .................................................................................................... 52
6.10 Schaltschrank - Switch cabinet .............................................................................................................. 52
6.11 Schaltplan - Wiring diagram - MH50G.................................................................................................... 57

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 4 Translation of the original instructions
MH50G│MH50VGB
6.12 Schaltplan - Wiring diagram - MH50V ....................................................................................................60
7 Malfunctions
7.1 Milling machine malfunctions..................................................................................................................67
8 Appendix
8.1 Copyright ................................................................................................................................................68
8.2 Terminology/Glossary.............................................................................................................................68
8.3 Change information operating manual....................................................................................................68
8.4 Liability claims/warranty..........................................................................................................................69
8.5 Advice for disposal / Options of reuse: ...................................................................................................69
8.6 Storage ...................................................................................................................................................70
8.7 Dismantling, disassembling, packing and loading ..................................................................................70
8.7.1 Decommissioning ........................................................................................................................71
8.7.2 Dismantling..................................................................................................................................71
8.7.3 Disassembly ................................................................................................................................71
8.7.4 Packing and loading ....................................................................................................................71
8.8 Disposal of new device packaging..........................................................................................................71
8.9 Disposal of lubricants and cooling lubricants..........................................................................................71
8.10 Disposal via municipal collection facilities ..............................................................................................72
8.11 Product follow-up ....................................................................................................................................72

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 5Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_preface.fm
Preface
Dear customer,
Thank you very much for purchasing a product made by OPTIMUM.
OPTIMUM metal working machines offer a maximum of quality, technically optimum solutions and convince
by an outstanding price performance ratio. Continuous enhancements and product innovations guarantee
state-of-the-art products and safety at any time.
Before commissioning the machine please thoroughly read these operating instructions and get familiar with
the machine. Please also make sure that all persons operating the machine have read and understood the
operating instructions beforehand.
Keep these operating instructions in a safe place nearby the machine.
Information
The operating instructions include indications for safety-relevant and proper installation, operation and main-
tenance of the machine. The continuous observance of all notes included in this manual guarantee the safety
of persons and of the machine.
The manual determines the intended use of the machine and includes all necessary information for its eco-
nomic operation as well as its long service life.
In the paragraph "Maintenance" all maintenance works and functional tests are described which the operator
must perform in regular intervals.
The illustration and information included in the present manual can possibly deviate from the current state of
construction of your machine. Being the manufacturer we are continuously seeking for improvements and
renewal of the products. Therefore, changes might be performed without prior notice. The illustrations of the
machine may be different from the illustrations in these instructions with regard to a few details. However,
this does not have any influence on the operability of the machine.
Therefore, no claims may be derived from the indications and descriptions. Changes and errors are reserved!
Your suggestion with regard to these operating instructions are an important contribution to optimising our
work which we offer to our customers. For any questions or suggestions for improvement, please do not hesi-
tate to contact our service department.
If you have any further questions after reading these operating instructions and you are not able to
solve your problem with a help of these operating instructions, please contact your specialised
dealer or directly the company OPTIMUM.
Optimum Maschinen Germany GmbH
Dr.- Robert - Pfleger - Str. 26
D-96103 Hallstadt, Germany
Fax (+49)0951 / 96555 - 888
Email: [e-mail]
Internet: www.optimum-machines.com

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 6 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_1.fm
1 Safety
Glossary of symbols
This part of the operating instructions
explains the meaning and use of the warning notes included in these operating instructions,
defines the intended use of the milling machine,
points out the dangers that might arise for you or others if these instructions are not
observed,
informs you about how to avoid dangers.
In addition to these operation instructions, please observe
the applicable laws and regulations,
the statutory provisions for accident prevention,
the prohibition, warning and mandatory signs as well as the warning notes on the milling
machine.
When installing, operating, maintaining and repairing the milling machine, the relevant stand-
ards must be observed.
If European standards have not yet been incorporated in the national legislation of the country
in question, the specific applicable regulations of each country must be observed.
If necessary, relevant measures must be taken to comply with national regulations before com-
missioning the milling machine.
Always keep this documentation close to the milling machine.
If you want to re-order the operating instructions for your machine, please quote the relevant
serial number. The serial number can be found on the type plate.
1.1 Type plates
provides further instructions
calls on you to act
listings
Optimum Maschinen
Germany GmbH
Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt
3338185
525 kg
2,2 kW
400 V ~50 Hz
MH 50V
3260 U/min
20
NO.
SN
Year
Master LabelsMaster Labels
3
2
1
AB
E N
FR
ES
IT
CS
D A
EL
FI
H U
NL
PL
PT
R O
R U
SK
SL
SV Borrning Fräsmaskin
TR
D E Bohr-Fräsmaschine
Drilling-milling machine
Fraiseuse
Taladradora-Fresadora
Fresatrice
Vrtačko frézka
Boor-freesmachine
Φρεζοδραπανο
Porajyrsin
Fúró- marógép
Boor-en freesmachine
Wiertarko - frezarka
Máquina de fresar e furar
Maşină de găurit şi frezat
Сверлильно-фрезерный станок
Steberni vrtalni stroj
Freze Tezgahı
Vŕtačko-frézka
Optimum Maschinen
Germany GmbH
Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt
3338180
525 kg
1,5 / 2,2 kW
400 V ~50 Hz
MH 50G
3260 U/min
20
NO.
SN
Year
Master Labels
AB
3
2
1
E N
FR
ES
IT
CS
D A
EL
FI
H U
NL
PL
PT
R O
R U
SK
SL
SV Borrning Fräsmaskin
TR
D E Bohr-Fräsmaschine
Drilling-milling machine
Fraiseuse
Taladradora-Fresadora
Fresatrice
Vrtačko frézka
Boor-freesmachine
Φρεζοδραπανο
Porajyrsin
Fúró- marógép
Boor-en freesmachine
Wiertarko - frezarka
Máquina de fresar e furar
Maşină de găurit şi frezat
Сверлильно-фрезерный станок
Steberni vrtalni stroj
Freze Tezgahı
Vŕtačko-frézka

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 7Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_1.fm
INFORMATION
If you are unable to rectify an issue using these operating instructions, please contact us for
advice:
Optimum Maschinen Germany GmbH
Dr. Robert-Pfleger-Str. 26
D-96103 Hallstadt, Germany
Email: [e-mail]
1.2 Safety instructions (warning notes)
1.2.1 Classification of hazards
We classify the safety warnings into different categories. The table below gives an overview of
the classification of symbols (ideogram) and the warning signs for each specific danger and its
(possible) consequences.
1.2.2 Other pictograms
Symbol Alarm expression Definition / consequence
DANGER! Impending danger that will cause serious injury or death to people.
WARNING! A danger that can cause serious injury or death.
CAUTION! A danger or unsafe procedure that can cause personal injury or damage
to property.
ATTENTION!
Situation that could cause damage to the milling machine and product, as
well as other types of damage.
No risk of injury to persons.
INFORMATION
Practical tips and other important or useful information and notes.
No dangerous or harmful consequences for people or objects.
In case of specific dangers, we replace the pictogram with
or
general danger with a warning of injury to hands, hazardous electrical
voltage,
rotating parts.
Warning: danger of slip-
ping!
Warning: risk of stumbling! Warning: hot surface! Warning: biological hazard!

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 8 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_1.fm
1.3 Intended use
WARNING!
In the event of improper use, the milling machine
may be a hazard to personnel,
the machine and other property of the operating company and
the functionality of the milling machine may be compromised.
The milling machine is designed and manufactured to be used for milling and drilling cold met-
als or other non-flammable materials or materials that do not constitute a health hazard when
commercial milling and drilling tools are used.
The milling machine must only be installed and operated in a dry and well-ventilated areas.
If the milling machine is used in any way other than described above, or modified without the
approval of Maschinen Germany GmbH, then the milling machine is being used improperly.
We will not be held liable for any damages resulting from any operation which is not in accord-
ance with the intended use.
We expressly point out that the guarantee will expire, if any constructive, technical or proce-
dural changes are not performed by the company Optimum Maschinen Germany GmbH. It is
also part of the intended use that you
observe the limits of the milling machine,
observe the operating instructions,
and comply with the inspection and maintenance instructions.
 "Technical data“ on page 18
Warning: automatic start-
up!
Warning: tilting danger! Warning: suspended loads! Caution, danger of explo-
sive substances!
Switching on forbidden! Operating with rotary cur-
rent plug is not permitted!
Read the operating instruc-
tions before commission-
ing!
Pull out the mains plug!
Wear protective glasses! Wear protective gloves! Wear safety shoes! Wear a protective suit!
Use ear protection! Only switch during stand-
still!
Protect the environment! Contact address

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 9Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_1.fm
WARNING!
Extremely severe injuries due to non-intended use.
It is forbidden to make any modifications or alternations to the operating parameters
values of the milling machine. They could pose an accident hazard to persons and cause
damage to the milling machine.
1.4 Reasonably foreseeable misuse
Any use other than that specified under "Intended use" or any use beyond that described will be
deemed non-intended use and is not permissible.
Any other use must be discussed with the manufacturer.
Only metallic, cold and non-flammable materials may be machined with the milling machine.
In order to avoid misuse, the operating instructions must be read and understood before first
commissioning.
Operators must be duly qualified.
1.4.1 Avoiding misuse
Use of suitable cutting tools.
Adapting the speed setting and feed to the material and workpiece.
Clamp workpieces firmly and free of vibration.
Risk of fire and explosion due to the use of flammable materials or cooling lubricants.
Before processing inflammable materials (e.g. aluminium, magnesium) or using inflamma-
ble auxiliary materials (e.g. spirit), you need to take additional preventive measures in order
to avoid health risks.
When processing plastics, the machine operator must ensure that static electricity gener-
ated during the machining process can be discharged easily.
When processing carbons, graphite and carbon-fibre-reinforced carbons, the machine is no
longer being used as intended. This causes the warranty to be null and void. When
processing carbons, graphite and carbon-fibre-reinforced carbons and similar materials, the
machine can be damaged extremely quickly, even if the dusts generated are completely
sucked out during the work process.
ATTENTION!
The workpiece is always to be fixed by a machine vice, jaw chuck or by another
appropriate clamping tool such as for the clamping claws.
WARNING!
Risk of injury caused by flying workpieces.
Clamp the workpiece in the machine vice. Make sure that the workpiece is firmly clamped in
the machine vice and that the machine vice is firmly clamped onto the machine table.
Use cooling and lubricating agents to increase the durability of the tool and to improve the
surface quality.
Clamp the cutting tools and workpieces on clean clamping surfaces.
Sufficiently lubricate the machine.
Set the bearing clearance and guides correctly.
Recommendations:
Insert the drill in a way that it is positioned exactly between the three clamping jaws of the
drill chuck.
Clamp end mills (or shank cutters) in a collet chuck using the corresponding collets.
Clamp end face mills using shell end mill arbors.
When drilling, make sure that

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 10 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_1.fm
the suitable speed is set depending on the diameter of the drill,
the pressure must only be such that the drill can cut without load,
if there is too much pressure, the drill will wear quickly and may even break or jam in the
borehole. If the drill jams, immediately stop the main motor by pressing the emergency stop
button,
use commercial cooling/lubricating agents for hard materials, e.g. steel and
generally always back the spindle out of the workpiece while it is still turning.
ATTENTION!
Do not use the drill chuck as a milling tool. Never clamp a milling cutter into a drill
chuck. Use a collet chuck and appropriate collets for end mills.
When milling, ensure that
the right cutting speed is selected;
for workpieces with normal strength values, e.g. steel, 18-22 m/min,
for workpieces with high strength values, 10-14 m/min,
the pressure is selected so that the cutting speed remains constant,
normal trade coolants/lubricants are used for hard materials.
CAUTION!
Additional for MH50V
In a domestic environment the machine MH50V may cause radio interference in which
case supplementary mitigation measures may be required.
The MH50V machine meets the requirements for category C2 for conducted emissions.
INFORMATION
The machine MH50V is authorized for industrial and commercial use in the business and com-
mercial areas, as well as in industrial areas. The use of the machine in public supply networks
requires a different configuration and/or additional measures.
This machine MH50V installed within the domestic environment require supply authority accept-
ance for connection to the public low-voltage power supply network. Please contact your local
supply network provider.
The machine MH50V installed within the category C3 (industrial) environment do not require
connection approval.
1.5 Possible dangers posed by the milling machine
The milling machine was built using state-of-the-art technology.
Nevertheless, there is a residual risk, as the milling machine operates with
high speeds,
circulating parts and tools and
electrical voltage and currents.
We have used design and safety engineering to minimize the health risk to personnel resulting
from these hazards.
If the milling machine is used and maintained by personnel who are not duly qualified, there
may be a risk resulting from its incorrect or unsuitable maintenance.
INFORMATION
Everyone involved in the assembly, commissioning, operation and maintenance must
be duly qualified,
and strictly follow these operating instructions.

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 11Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_1.fm
Always disconnect the milling machine from the electrical power supply before performing
cleaning or maintenance tasks.
WARNING!
The milling machine may only be used with fully functional safety devices.
Disconnect the milling machine immediately, whenever you detect a failure in the safety
devices or when they are not fitted!
All additional devices installed by the operator must be equipped with the stipulated
safety devices.
This is your responsibility being the operating company or private user!
 "Safety devices“ on page 13
1.6 Qualification
1.6.1 Private Users
The MH50G milling machine is also used in the private domain. The acumen of people in the
private sector with training in metal working was taken into consideration for creating this opera-
tion manual. Vocational training or further instruction in a metal working profession is a prereq-
uisite for safe operation of the machine. It is essential that the private user is aware of the
dangers involved in operating this machine. We recommend visiting a training course in the
operation of milling machines. Your specialist dealer can offer you an appropriate training
course. These courses are also offered by adult education centres in Germany.
1.6.2 Obligations of the User
The user must
have read and understood the operating manual,
be familiar with all safety devices and regulations,
be able to operate the milling machine.
1.6.3 Craftsman or industrial use
This manual is addressed to
the operating companies,
the operators,
the maintenance personnel.
Consequently, the warning notes refer both to the use of the milling machine and to its mainte-
nance.
WARNING!
Always isolate the milling machine from the electrical power supply. This will prevent it from
being used by unauthorized persons. The qualifications of the personnel for the different tasks
are mentioned below:
Operator
The operator has been instructed by the operating company regarding the assigned tasks and
possible risks in case of improper behaviour. Any tasks which need to be performed beyond the
operation in standard mode must only be performed by the operator, if so indicated in these
instructions and if the operator has been expressively commissioned by the operating com-
pany.
Qualified electrician
With professional training, knowledge and experience as well as knowledge of respective
standards and regulations, qualified electricians are able to perform work on the electrical sys-

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 12 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_1.fm
tem and recognise and avoid any possible dangers. Qualified electricians have been specially
trained for the working environment, in which they are working and know the relevant standards
and regulations.
Qualified personnel
Due to their professional training, knowledge and experience as well as knowledge of relevant
regulations, qualified personnel are able to perform the assigned tasks and to independently
recognise and avoid any possible dangers.
Instructed person
Instructed persons were instructed by the operating company regarding the assigned tasks and
any possible risks of improper behaviour.
INFORMATION
Everyone involved in the assembly, commissioning, operation and maintenance must
be duly qualified,
and strictly follow these operating instructions.
In the event of improper use
there may be a risk to personnel,
the milling machine and other property and
the functionality of the milling machine may be compromised.
1.6.4 Authorized personnel
WARNING!
Inappropriate operation and maintenance of the machine constitutes a danger for
personnel, property and the environment.
Only authorized personnel may operate the machine!
Authorized operating and maintenance personnel are specialists instructed and trained by the
operator and the manufacturer.
1.6.5 Operator's obligations
The operator must instruct personnel at least once a year in
all safety regulations relevant to the machine,
its operation and
generally accepted engineering standards.
The operator must also
check the personnel‘s knowledge level,
document the training/instruction,
have attendance at the training/instruction confirmed by signature and
check whether personnel is working in a manner that shows awareness of safety and risks.
Define and document the machine inspection deadlines in accordance with section 3 of the
Factory Safety Order and perform an operational risk analysis in accordance with section 6
of the Safety at Work Act.
1.6.6 Obligations of the operator
The user must
have read and understood the operating instructions,
be familiar with all safety devices and regulations and
be able to operate the machine.

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 13Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_1.fm
1.6.7 Additional requirements regarding qualification
The following additional requirements apply for work on electrical components or equipment:
They must only be performed by a qualified electrician or person working under the instruc-
tions and supervision of a qualified electrician.
Before starting work on electrical parts or operating agents, the following actions must be taken
in the order given:
disconnect all poles,
secure against restarting,
check that there is no voltage.
1.7 User positions
The user position is in front of the milling machine.
1.8 Safety measures during operation
CAUTION!
Danger due to inhaling dust and mist that are hazardous to health.
Depending on the materials to be machined and the agents used, dusts and mists can
arise that are detrimental to health.
Ensure that the harmful dust and mist generated are safely sucked off at the point of
origin and routed away from the working area or filtered. To do so, use a suitable
extraction unit.
CAUTION!
Risk of fire and explosion by using flammable materials or cooling lubricants.
Extra precautionary measures must be taken before machining flammable materials (e.g. alu-
minium, magnesium) or using combustible agents (e.g. spirit) to avert a health hazard.
1.9 Safety devices
The milling machine must only be operated with fully functional safety devices.
Stop the milling machine immediately if there is a failure on the safety device or becomes inef-
fective.
This is your responsibility!
If a safety device has been activated or has failed, the milling machine must only be used if you
have eliminated the cause of the fault and
have verified that there is no danger to personnel or objects.
WARNING!
If you bypass, remove or override a safety device in any other way, you are endangering
yourself and other persons working with the milling machine. The possible
consequences include:
injuries due to components or workpieces flying off at high speed,
contact with rotating parts and
fatal electrocution.
WARNING!
Although the isolating safety devices provided and delivered with the machine are designed to
reduce the risks of workpieces being ejected or parts of tools or workpieces breaking off, they
cannot eliminate these risks completely. Always work carefully and observe the limits of the
machining process.

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 14 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_1.fm
1.9.1 Emergency stop button
CAUTION!
Only press the emergency stop button in a genuine emergency. Do not use the
emergency stop button to stop the machine during normal operation.
CAUTION!
The spindle continues to rotate for a
while, depending on the moment of
inertia of the spindle and the tool in
use.
The emergency stop button brings the
machine to a standstill.
Turn the knob to the right to unlock and
release the emergency stop button.
Img.1-1: Emergency stop button
1.9.2 Lockable master switch
The lockable master switch can be
secured in the "0" position by means of
a padlock to guard against the milling
machine being switched on accidentally
or by an unauthorised person.
The power supply is cut off when the
master switch is in the off position.
Except for the areas marked by the pic-
togram in the margin.
Img.1-2: Main switch
WARNING!
Dangerous voltage even if the main switch is switched off. The areas marked by the
pictogram might contain live parts, even if the master switch is switched off.
1.9.3 Stored charge on MH50V
WARNING!
The frequency converter of MH50V contains capacitors that remain charged with a potentially
lethal voltage after the machine has been isolated from the mains. If the frequency controller
was under power, it must be disconnected from the power supply for at least 10 minutes.
Before continuing to work, ensure there is no voltage. Normally, the capacitors are discharged
by an internal resistor. In certain unusual error conditions, it is possible that the capacitors are
not discharged or that a discharge is prevented by voltage on the adjacent motor connection
terminals. If the frequency converter has a technical defect, so that nothing is shown on the dis-
play, the capacitors may not be discharged.
Emergency stop
push button
Main switch

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 15Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_1.fm
1.9.4 Separation guard
Adjust the guard (1) to the correct height
before you start working.
To do so, slacken the clamping screw, set
the required height and re-tighten the
clamping screw.
There is a switch integrated in the spindle
protection mounting which monitors the
closed position.
INFORMATION
The machine cannot be started, if the spin-
dle protection is not closed.
Img.1-3: Separation guard
1.10 Safety check
Check the milling machine regularly.
Check all safety devices
before starting work,
once a week (with the machine in operation) and
after all maintenance and repair work.
1
General check
Equipment Check OK
Guards Mounted, firmly bolted and not damaged
Signs,
Markers
Installed and legible
Functional check
Equipment Check OK
Emergency stop button After the emergency stop button is pressed, the milling machine
must switch off. It must only be possible to restart the machine, if
the emergency stop button is unlocked and the ON switch has
been pressed.
Separation guard around
the drill and milling spindle
The milling machine may switch on only when the guard is
closed.

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 16 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_1.fm
1.11 Personal protective equipment
For certain work, personal protective equipment is required.
Protect your face and your eyes: Wear a safety helmet with facial protection when performing
work where your face and eyes are exposed to hazards.
Wear protective gloves when handling pieces with sharp edges.
Wear safety shoes when you assemble, disassemble or transport heavy components.
Use ear protection if the noise level (emission) in the workplace exceeds 80 dB (A).
Before starting work make sure that the required personal protective equipment is available at
the work place.
CAUTION!
Dirty or contaminated personnel protective equipment can cause illness. It must be
cleaned after each use and at least once a week.
1.12 For your own safety during operation
WARNING!
Before switching the milling machine on, make sure that there is no risk of personal
injury or damage to property.
Avoid any unsafe work methods:
Make sure that your operation does not create a safety hazard.
The rules specified in these operating instructions must be observed during assembly,
operation, maintenance and repair.
Use protective glasses!
Switch off the milling machine before measuring the workpiece.
Do not work on the milling machine, if your concentration is reduced, for example, because
you are taking medication.
Stay at the milling machine until the movements have stopped completely.
Use the specified personal protective equipment. Ensure you wear close-fitting clothing
and, if necessary, a hairnet.
Do not use protective gloves when drilling or milling.
Turn off the machine before changing the milling tool.
Use appropriate agents to remove drilling and milling chips.
Ensure that your work does not create a safety risk.
Clamp the workpiece securely and firmly before switching on the milling machine.
We specifically point out the dangers in the description of work with and on the drilling machine.
1.13 Switching-off and securing the milling machine
1.13.1 Lockable main switch
WARNING!
Dangerous voltage even if the main switch is switched off.
The areas marked by the pictogram might contain live parts, even if the master switch is
switched off.
In the "0" position, the lockable main switch can be secured against accidental or non-author-
ised switching on by means of a padlock.
The power supply is cut off when the master switch is in the off position.

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 17Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_1.fm
1.14 Using lifting equipment
WARNING!
The use of unstable lifting and load suspension equipment that might break under load
can cause severe injuries or even death.
Check to ensure that the lifting and load-suspension equipment are of sufficient load-
bearing capability and are in perfect condition.
Observe the accident prevention regulations issued by your Employers Liability
Insurance Association or other supervisory authorities applicable to your company.
Fasten the loads carefully. Never walk under suspended loads!
1.15 Symbols on the milling machine
Make sure that the mandatory and warning symbols are legible.
1.16 Electronics
Craftsman or industrial use
Have the machine and/or the electric equipment checked regularly. Immediately eliminate all
defects such as loose connections, defective wires, etc.
A second person must be present during work on live components to disconnect the power in
the event of an emergency. If there is a fault in the power supply, switch off the milling machine
immediately!
Comply with the required inspection intervals in accordance with the factory safety directive,
operating equipment inspection.
The operator of the machine must ensure that the electrical systems and operating equipment
are inspected with regards to their proper condition, namely,
by a qualified electrician or under the supervision and direction of a qualified electrician,
prior to initial commissioning and after modifications or repairs, prior to recommissioning
and at set intervals.
The intervals must be set so that foreseeable defects can be detected in a timely manner, when
they occur.
The relevant electro-technical rules must be followed during the inspection.
No check is required before first commissioning, if the manufacturer or installer has confirmed
to the operator that the electrical system and operating materials have been procured in
accordance with the stipulations of the accident prevention regulations.
Permanently installed electrical systems and operating materials are considered constantly
monitored if they are continually serviced by qualified electricians and inspected by means of
measurements during operation (e.g. monitoring the insulation resistance).
1.17 Inspection deadlines
Craftsman or industrial use
Define and document the inspection deadlines for the machine in accordance with § 3 of the
Factory Safety Act and perform an operational risk analysis in accordance with § 6 of the Work
Safety Act. Also use the inspection intervals in the maintenance section as reference values.

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 18 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_2.fm
2 Technical data
The following information represents the dimensions and indications of weight and the manu-
facturer‘s approved machine data.
2.1 Electrical connection MH50G MH50V
Total connection 400V ; 3 KVA 400V ; 3 KVA
Milling spindle motor power 1.5 / 2.2 KW 2.2 KW
Rapid traverse motor power Z-axis 0.12 KW S6-60%
2.2 Milling capacity MH50G MH50V
Drilling capacity in steel (S235JR) [mm] max. Ø38
Drilling capacity in steel (S235JR) [mm] max. Ø24
Max. milling head size [ mm] max. Ø80
Max. end mill cutter size [ mm] max. Ø32
2.3 Spindle seat MH50G MH50V
Spindle seat Taper JIS (MAS 403 BT40)
Pull stud BT40x45°
Maximum distance between spindle nose - milling table
[mm]
0 until 545
44.45
22.5 22.5
16.1
25
65,4 ± 0,2
17
63
17
M16
8.2
32
45
15
10
60
35
M16
45°

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10 Page 19Translation of the original instructions
MH50G│MH50V GB
MH50G_MH50V_GB_2.fm
2.4 Drill-mill head MH50G MH50V
Spindle sleeve stroke [mm] 115
Quill diameter [mm] Ø 80
Travel Z axis - rapid traverse [mm] 350
Manual travel Z axis [mm] 545
Throat [mm] 260
Inclination range 30°
Z axis handwheel scale 3mm/rev - graduation 0.05mm
2.5 Cross table MH50G MH50V
Table length [mm] 850
Table width [mm] 240
Max. bearing load 175 kg
T-slot size / distance / number 18 mm / 80 mm / 3
X axis travel [mm] 520
X axis handwheel scale 3mm/rev - graduation 0.05mm
Y axis travel [mm] 260
Y axis handwheel scale 3mm/rev - graduation 0.05mm
2.6 Dimensions MH50G MH50V
 "Dimensions, balance point“ on page 24
Total weight [kg] 525
2.7 Work area MH50G MH50V
Keep a work area of at least one metre around the machine
free for operation and maintenance.
2.8 Speeds MH50G MH50V
Speed range / Gear stages / Motor stages [ rpm ] 225 to 3260 / 6 / 2 -
Electronic speed range / Gear stages [ rpm ] - 50 to 3260 / 3
2.9 Environmental conditions MH50G MH50V
Temperature 19 - 21 °C (for an optimum milling result)
permissible range + 10° to + 35°C
Admissible relative humidity 5...90 % no condensation
30% to 90% at 35°C
90 % at 21°C
+Z
+Y
+X

OPTIMUM
MASCHINEN - GERMANY
Version 1.0.1 dated 2017-08-10Page 20 Translation of the original instructions
MH50G│MH50VGB
MH50G_MH50V_GB_2.fm
Emission measurement
Measurement in operating conditions in accordance with DIN ISO 8525 with surface areas
Measurement methods in accordance with DIN 45635.
The generation of noise emitted by the MH50G is 74 dB(A) on no-load running at 80% of max.
spindle speed, measured at a distance of one meter from the machine and at a height of 1.6m.
The generation of noise emitted by the MH50V is 78 dB(A) on no-load running at 80% of max.
spindle speed, measured at a distance of one meter from the machine and at a height of 1.6m.
If the milling machine is installed in an area where various machines are in operation, the noise
exposure (immission) on the operator of the milling machine at the working place may exceed
80 dB(A).
INFORMATION
This numerical value was measured on a new machine under the operating conditions specified
by the manufacturer. The noise behaviour of the machine might change depending on the age
and wear of the machine.
Furthermore, the noise emission also depends on production engineering factors, e.g. speed,
material and clamping conditions.
INFORMATION
The specified numerical value represents the emission level and does not necessarily a safe
working level.
Though there is a dependency between the degree of the noise emission and the degree of the
noise disturbance it is not possible to use it reliably to determine if further precaution measures
are required or not.
The following factors influence the actual degree of the noise exposure of the operator:
Characteristics of the working area, e.g. size or damping behaviour,
other noise sources, e.g. the number of machines,
other processes taking place in proximity and the period of time, during which the operator
is exposed to the noise.
Furthermore, it is possible that the admissible exposure level might be different from country to
country due to national regulations.
This information about the noise emission should, however, allow the operator of the machine
to more easily evaluate the hazards and risks.
Compressed air 700...1060 hPa
Environmental conditions - storage 5 - 45 °C
2.10 Operating material MH50G MH50V
Gear Oil quantity 1.2 litre.
Mobilgear 627, ISO VG 100
Viscosity 100 cSt at 40°C or a comparable oil
 "Schmierstoffe“ on page 65
Bare steel parts Mobilgrease OGL 007 or,
Mobilux EP 004, acid-free oil, e.g. weapon oil, motor oil
2.11 Emissions MH50G MH50V
Maximum sound pressure level at 1 m distance from
the machine and 1.60 m above the ground.
72 - 76 dB(A) 76 - 80 dB(A)