Optimum B 24 H User manual

GB
Operating Manual
Version 2.2.6
Bench drilling machine
Part no. 3020241
3020243
Part no. 3020245
Part no. 3020283
Part no. 3020285
Upright drilling machine

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Table of contents
1 Safety
1.1 Safety instructions (warning notes)................................................................................................................ 6
1.1.1 Classification of hazards .................................................................................................................. 6
1.1.2 Other pictograms.............................................................................................................................. 7
1.2 Intended use .................................................................................................................................................. 8
1.3 Reasonably foreseeable misuse.................................................................................................................... 9
1.3.1 Avoiding misuse............................................................................................................................. 10
1.4 Possible dangers caused by the drilling machine........................................................................................ 10
1.5 Qualification of personnel ............................................................................................................................ 11
1.5.1 Target group................................................................................................................................... 11
1.5.2 Authorized persons ........................................................................................................................ 12
1.6 Operator positions ....................................................................................................................................... 13
1.7 Safety measures during operation............................................................................................................... 13
1.8 Safety devices ............................................................................................................................................. 13
1.9 Safety check ................................................................................................................................................ 14
1.10 Emergency-stop push button....................................................................................................................... 15
1.11 Drilling table ................................................................................................................................................. 15
1.12 Separating protective devices...................................................................................................................... 15
1.12.1 Protective cover of the V-belts ....................................................................................................... 15
1.12.2 Drill chuck guard ............................................................................................................................ 16
1.13 Personal protective equipment .................................................................................................................... 16
1.14 Safety during operation................................................................................................................................ 16
1.15 Safety during maintenance.......................................................................................................................... 17
1.15.1 Disconnecting and securing the drilling machine ...........................................................................17
1.16 Using lifting equipment ................................................................................................................................ 17
1.16.1 Mechanical maintenance ............................................................................................................... 17
1.17 Accident report............................................................................................................................................. 18
1.18 Electrical system.......................................................................................................................................... 18
1.19 Inspection deadlines.................................................................................................................................... 18
2 Technical specification
2.1 Electrical connection.................................................................................................................................... 19
2.2 Drilling capacity............................................................................................................................................ 19
2.3 Spindle seat................................................................................................................................................. 19
2.4 Drilling table ................................................................................................................................................. 19
2.5 Required space............................................................................................................................................ 19
2.10 Emissions .................................................................................................................................................... 20
2.6 Speeds type H ............................................................................................................................................. 20
2.7 Speeds type HV........................................................................................................................................... 20
2.8 Environmental conditions............................................................................................................................. 20
2.9 Operating material ....................................................................................................................................... 20
2.11 Dimensions B24H ........................................................................................................................................ 22
2.12 Dimensions B24HV...................................................................................................................................... 23
2.13 Dimensions B28H ........................................................................................................................................ 24
2.14 Dimensions B28HV...................................................................................................................................... 25
3 Delivery, interdepartmental transport and unpacking
3.1 Notes on transport, installation and unpacking............................................................................................ 26
3.1.1 General risks during internal transport ........................................................................................... 26
3.2 Scope of delivery ......................................................................................................................................... 27
3.3 Set-up and assembly................................................................................................................................... 27
3.3.1 Requirements regarding the installation site .................................................................................. 27
3.4 Assembly ..................................................................................................................................................... 27
3.4.1 Mounting of base and drill column ................................................................................................. 28
3.4.2 Assembly of the drilling machine table B24H - B24HV .................................................................. 29
3.4.3 Assembly of the drilling machine table B28H - B28HV .................................................................. 29
3.4.4 Fitting the drill head........................................................................................................................ 31
3.5 Installation.................................................................................................................................................... 32
3.5.1 Fixing.............................................................................................................................................. 32
3.5.2 Installation drawings....................................................................................................................... 33
3.6 First commissioning ..................................................................................................................................... 35

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3.6.1 Electrical connection.......................................................................................................................35
3.6.2 Warming up the machine................................................................................................................36
4Operation
4.1 Safety ...........................................................................................................................................................37
4.2 Control and indicating elements ...................................................................................................................37
4.2.1 Drilling machine B24H - B24HV......................................................................................................37
4.2.2 Drilling machine B28H - B28HV......................................................................................................38
4.2.3 Control panel B24H - B24HV..........................................................................................................39
4.2.4 Control panel B28H - B28HV..........................................................................................................39
4.3 Switching the machine B24H - B28H on ......................................................................................................41
4.4 Switching the machine B24HV - B28HV on .................................................................................................41
4.5 Switching the machine B24H - B28H off ......................................................................................................41
4.6 Switching the machine B24HV - B28HV off .................................................................................................42
4.7 Speed variation ............................................................................................................................................42
4.7.1 Speed table B24H...........................................................................................................................43
4.7.2 Speed table B24HV ........................................................................................................................43
4.7.3 Speed table B28H...........................................................................................................................44
4.7.4 Speed table B28HV ........................................................................................................................45
4.8 Drill depth stop .............................................................................................................................................45
4.9 Disassembly, assembly of drill chucks and drill bits.....................................................................................46
4.9.1 Use of the quick-action drill chuck ..................................................................................................46
4.9.2 Disassembly of the drill chuck B24H - B24HV................................................................................46
4.9.3 Disassembly with the integrated drill drift on the B28H - B28HV....................................................47
4.9.4 Mounting the drill chuck B24H - B24HV and B28H - B28HV..........................................................48
4.10 Cooling .........................................................................................................................................................48
4.11 Before starting work .....................................................................................................................................49
4.12 During work ..................................................................................................................................................49
5 Determining the cutting speed and the speed
5.1 Table cutting speeds / infeed .......................................................................................................................51
5.2 Speed table ..................................................................................................................................................51
5.3 Examples to calculatory determine the required speed for your drilling machine ........................................53
6 Maintenance
6.1 Safety ...........................................................................................................................................................54
6.1.1 Preparation .....................................................................................................................................54
6.1.2 Restarting .......................................................................................................................................54
6.2 Inspection and maintenance ........................................................................................................................55
6.3 Repair...........................................................................................................................................................60
6.3.1 Customer service technician...........................................................................................................60
6.4 Cooling lubricants and tanks ........................................................................................................................61
6.4.1 Inspection plan for water-mixed cooling lubricants .........................................................................62
7 Ersatzteile - Spare parts
7.1 Ersatzteilbestellung - Ordering spare parts ..................................................................................................63
7.2 Hotline Ersatzteile - Spare parts Hotline ......................................................................................................63
7.3 Service Hotline .............................................................................................................................................63
7.4 Ersatzteilzeichnung B24H - Spare parts drawing B24H ...............................................................................64
7.4.1 Bohrkopf B24H - Drilling head B24H ..............................................................................................64
7.4.2 Säule und Bohrtisch B24H - Column and drilling table B24H.........................................................65
7.4.3 Keilriemenscheiben B24H - Pulleys B24H......................................................................................66
7.5 Ersatzteilzeichnung B24HV - Spare parts drawing B24HV ..........................................................................70
7.5.1 Bohrkopf B24HV - Drilling head B24HV .........................................................................................70
7.5.2 Säule und Bohrtisch B24HV - Column and drilling table B24HV ....................................................71
7.5.3 Keilriemenscheiben B24HV - Pulleys B24HV.................................................................................72
7.5.4 Ersatzteilliste B24HV - Parts list B24HV.........................................................................................72
7.6 Maschinenschilder - Machine labels B24H ..................................................................................................76
7.7 Maschinenschilder - Machine labels B24HV ................................................................................................77
7.8 Schaltplan - Wiring diagram B24H / B28H - 230 V.......................................................................................79
7.9 Schaltplan - Wiring diagram B24HV.............................................................................................................80
7.10 Ersatzteilzeichnung B28H - Spare parts drawing B28H ...............................................................................81
7.10.1 Bohrkopf B28H - Drilling head B28H ..............................................................................................81
7.10.2 Säule und Bohrtisch B28H - Column and drilling table B28H.........................................................82
7.10.3 Keilriemenscheiben B28H - Pulleys B28H......................................................................................83

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7.10.4 Ersatzteilliste B28H - Parts list B28H............................................................................................. 84
7.11 Ersatzteilzeichnung B28HV - Spare parts drawing B28HV ......................................................................... 88
7.11.1 Bohrkopf B28HV - Drilling head B28HV......................................................................................... 88
7.11.2 Säule und Bohrtisch B28HV - Column and drilling table B28HV ................................................... 89
7.11.3 Keilriemenscheiben B28HV - Pulleys B28HV ................................................................................ 90
7.12 Ersatzteilliste B28HV - Parts list B28HV...................................................................................................... 90
7.13 Maschinenschilder - Machine labels B28H.................................................................................................. 95
7.14 Maschinenschilder - Machine labels - B28HV ............................................................................................. 97
7.15 Schaltplan - Wiring diagram - B28H - 400V................................................................................................. 98
7.16 Schaltplan - Wiring diagram - B28HV 1-2.................................................................................................... 99
7.17 Schaltplan - Wiring diagram - B28HV 2-2.................................................................................................. 100
8 Malfunctions
9 Appendix
9.1 Copyright ................................................................................................................................................... 103
9.2 Terminology/Glossary................................................................................................................................ 103
9.3 Change information operating manual....................................................................................................... 103
9.4 Liability claims/warranty............................................................................................................................. 104
9.5 Advice for disposal / Options of reuse: ...................................................................................................... 104
9.5.1 Decommissioning......................................................................................................................... 105
9.5.2 Disposal of new device packaging ............................................................................................... 105
9.5.3 Disposal of the old device ............................................................................................................ 105
9.5.4 Disposal of electrical and electronic components ........................................................................ 105
9.5.5 Disposal of lubricants and coolants.............................................................................................. 106
9.6 Disposal via municipal collection facilities ................................................................................................. 106
9.7 RoHS, 2011/65/EU .................................................................................................................................... 106
9.8 Product follow-up ....................................................................................................................................... 106
9.9 Storage ...................................................................................................................................................... 107

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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 econo-
micoperation 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
ofconstruction 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
drilling 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
hesitate to contact our service department.
If you have any further questions after reading these operating instructions and you are not able
tosolve your problem with a help of these operating instructions, please contact your
specialiseddealer or directly the company OPTIMUM.
Optimum Maschinen Germany GmbH
Dr.- Robert - Pfleger - Str. 26
D-96103 Hallstadt
Fax (+49)0951 / 96 555 - 888
Email: [e-mail]
Internet: www.optimum-maschinen.de

Safety
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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 drilling machine,
points out the dangers that might arise for you or others if these instructions are not obser-
ved,
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 drilling
machine.
Always keep this documentation close to the drilling machine.
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]
1.1 Safety instructions (warning notes)
1.1.1 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.
provides further instructions
calls on you to act
listings
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 drilling machine and product, as
well as other types of damage.
No risk of injury to persons.

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1.1.2 Other pictograms
Information
Practical tips and other important or useful information and notes.
No dangerous or harmful consequences for people or objects.
Symbol Alarm expression Definition / consequence
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!
Warning: automatic start-
up! Warning: tilting danger! Warning: suspended loads! Caution, danger of explo- sive substances!
Switching on forbidden! Use ear protection!
Read the operating instruc-
tions before commissio-
ning!
Pull out the mains plug!
Wear protective glasses! Wear protective gloves! Wear safety shoes! Wear a protective suit!

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1.2 Intended use
WARNING!
In the event of improper use of the drilling machine
will endanger personnel,
will endanger the machine and other material property of the operating company,
the correct function of the drilling machine may be affected.
The drilling machine is designed and manufactured to be used in a non-explosive environment.
The drilling machine is designed and manufactured for holes in cold metals or other non flam-
mable materials or that not constitute a health hazard using a rotating filing-stripping tool that
has a number of grooves for collecting the filings.
If the drilling machine is used in any way other than described above, modified without authori-
zation of Optimum Maschinen Germany GmbH, then the geared drill is being used improperly.
We will not be held liable for any damages resulting from any operation which is not in accor-
dance with the intended use.
We expressly point out that the guarantee or CE conformity will expire due to any constructive
technical or procedural changes which had not been performed by the company Optimum
Maschinen Germany GmbH.
It is also part of intended use that
observe the limits of the drilling machine,
the operating manual is observed,
the inspection and maintenance instructions are observed.
 Technical specification on page 19
WARNING!
Extremely severe injuries.
It is forbidden to make any modifications or alternations to the operation values of the
drilling machine! They could endanger the personnel and cause damage to the drilling
machine.
WARNING!
The B24HV and B28HV drilling machine is not intended for use in residential facilities
where the power is supplied via a public low voltage supply system. In these areas, it
may be difficult to guarantee electromagnetic compatibility due to conducted and
emitted interference.
CAUTION!
If the drilling machine is not used as intended or if the safety directives or the operating
instructions are ignored the liability of the manufacturer for any damages to persons or
objects resulting hereof is excluded and the claim under guarantee is becoming null and
avoid!

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1.3 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.
It is only allowed to process metal, cold and non-inflammable materials with the drilling
machine.
In order to avoid misuse, it is necessary to read and understand the operating instructions
before first commissioning.
Operators must be qualified.
INFORMATION
The drilling machine for regulating the speed is built according to the standard EN 61800-3
class C2.
WARNING!
This machine is not intended for use in residential buildings, in which the power supply
is provided via a public low voltage supply system. In these areas it may possibly be
difficult to guarantee electromagnetic compatibility due to lead bound as well as emitted
interferences.
Overview of the EMC categories:
Categorie C1
required limit values Class B Group 1 according to EN 55011
Categorie C2
Required limit values class A Group 1 according to EN 55011, Installation by EMC experts
and warning: “This is a product of category C2 according to EN 61800-3. This product may
cause radio interference in a residential area. In this case, it may be necessary for the ope-
rator to take appropriate action.“
Categorie C3
Required limit values class A group 2 according to EN 55011, whereby these limit values
are below those of class A group 1, plus warning: „This type is not suitable for connection to
a public low-voltage network supplying residential buildings. When connecting to a public
low voltage network, radio frequency interference is expected. "
Machine
B24HV and B28HV
Categorie C1 C2 C3 C4
Environment
Residential area
Business area
Industrial area
Industrial area
Voltage / Current < 1000 V > 1000 V
EMC knowledge no requirement Installation and commissioning by an EMC expert

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1.3.1 Avoiding misuse
Use of suitable cutting tools.
Adapting the speed adjustment and feed to the material and workpiece.
Clamp workpieces firmly and free of vibration.
Operating the drilling machineB24HV and B28HV only in industrial supply networks.
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 exactly positioned between the three clamping jaws of the
quick action chuck.
When drilling, make sure that
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 gets jammed immediately stop the main motor by pressing the emer-
gency 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.
1.4 Possible dangers caused by the drilling machine
The drilling machine was built using state-of-the-art technology.
Nevertheless, there is a residual risk as the drilling machine operates with
high speeds,
rotating parts,
electrical voltage and currents.
We have used design and safety engineering to minimize the health risk to personnel resulting
from these hazards.
If the drilling machine is used and maintained by personnel who are not duly qualified, there
may be a risk resulting from incorrect or unsuitable maintenance of the geared drill.
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,

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there may be a risk to the machine and other material values,
the correct function of the drilling machine may be affected.
Always disconnect the drilling machine if cleaning or maintenance work is being carried out, or
is no longer in use.
WARNING!
The drilling machine may only be operated with functional safety devices.
Disconnect the drilling 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 as the operator!
 Safety devices on page 13
1.5 Qualification of personnel
1.5.1 Target group
This manual is addressed to
operators,
users and
maintenance personnel.
Therefore, the warning notes refer to both, operation and maintenance personnel of the drilling
machine.
Determine clearly and explicitly who will be responsible for the different activities on the geared
drill (operation, setting up, maintenance and repair).
Unclear responsibilities constitute a safety risk!
Always disconnect plug of the drilling machine from the electrical power supply. This will pre-
vent it from being used by unauthorized persons.
The qualifications of the personnel for the different tasks are mentioned below:
Operator
The operator is instructed by the operating company about the assigned tasks and possible
risks in case of improper behaviour. The operator may only carry out tasks that exceed normal
operation if this is stated in these instructions and the operating company has explicitly entru-
sted him with the task.
Qualified electrician
With professional training, knowledge and experience as well as knowledge of respective stan-
dards and regulations, qualified electricians are able to perform work on the electrical system
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.

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1.5.2 Authorized persons
WARNING!
Inappropriate operation and maintenance of the drilling machine constitutes a danger for
the personnel, objects and the environment.
Only authorized personnel may operate the drilling machine !
Authorized operating and maintenance personnel are specialists instructed and trained by the
operator company and the manufacturer.
Obligations of the operating company
train the personnel,
instruct the personnel in regular intervals (at least once a year) on
- all safety regulations relevant to the machine,
- its operation and
- generally accepted engineering standards.
check the personnel‘s knowledge level,
document the training/instruction,
have attendance at the training/instruction confirmed by signature and
check whether the personnel is working in a safety and risk-conscious manner and follo-
wing the operating instructions.
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.
Obligations of the operator
have obtained a training regarding the handling of the drilling machine,
know the function and mode of action,
before taking the machine in operation
- have read and understood the operating manual,
- be familiar with all safety devices and instructions.
Additional requirements apply for work on the following machine components:
Electrical parts or operating agents: shall only be performed by an electrician or under the
guidance and supervision of an 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

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1.6 Operator positions
The operator position is in front of the drilling
machine.
Abb.1-1: Operator positions
1.7 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.
aluminium, magnesium) or using combustible agents (e.g. spirit) to avert a health
hazard.
1.8 Safety devices
Use the drilling machine only with properly functioning safety devices.
Stop the drilling machine immediately, if a safety device fails or is faulty or becomes ineffective.
It is your responsibility!
If a safety device has been activated or has failed, the drilling machine must only be used if you
the cause of the fault has been eliminated,
you have verified that there is no danger to personnel or objects.
WARNING!
If you bypass, remove or deactivate a safety device in any other way, you are
endangering yourself and other personnel working with the drilling machine. The
possible consequences are:
injuries due to components or workpieces flying off at high speed,
contact with rotating parts,
fatal electrocution.
WARNING!
Although the isolating safety devices provided and delivered with the machine are desi-
gned to reduce the risks of workpieces being ejected or parts of tools or workpieces bre-

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aking off, they cannot eliminate these risks completely. Always work carefully and
observe the limits of the machining process.
The drilling machine features the following safety devices:
an emergency stop push button,
a drilling table with T-slots to fix the workpiece or a vice,
a protective cover for the pulleys with positioning switch,
a drill chuck guard, in order to prevent interference with the rotating tool.
1.9 Safety check
Check the drilling machine before each start-up or at least once per shift. Inform the person
responsible immediately of any damage, defects or changes in the operating function.
Check all safety devices
at the beginning of each shift (with the machine stopped),
once a week (with the machine in operation) and
after all maintenance and repair work.
Check that prohibition, warning and information signs and the labels on the drilling machine
are legible (clean them, if necessary)
are complete (replace if necessary).
INFORMATION
Organise the checks according to the following table;
General check
Equipment Check OK
Guards Mounted, firmly bolted and not damaged
Signs,
Markers
Installed and legible
Date: Checked by (signature):
Functional check
Equipment Check OK
Emergency stop
push button
After actuating the emergency stop push button the drilling
machine must be switched off.
Limit switch protective
cover
V-belt
The drilling machine must not be switched on, if the protective
cover of the V-belts is opened. An opening of the protective
cover during machine operating turns off the machine.
Drill chuck guard The drilling machine may only switch on, if the drill chuck guard
is closed. The engine must switch off when the drill chuck guard
is opened during operation.
Date: Checked by (signature):

Safety
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1.10 Emergency-stop push button
ATTENTION!
The drilling spindle keeps
turning for a short time
even after actuating the
emergency stop push but-
ton depending on the pre-
set speed.
Abb.1-2: Emergency stop B24H - B24HV, B28H - B28HV
1.11 Drilling table
Seats for T-slots are atta-
ched to the clamping table.
WARNING!
Risk of injury due to
workpieces flying off at
high speed. Securely fix the
workpiece on the drilling
table.
Abb.1-3: Drilling table
1.12 Separating protective devices
1.12.1 Protective cover of the V-belts
A protective cover for the belt
pulleys is mounted on the dril-
ling head. There is a switch
integrated in the protective
cover which monitors that the
cover is closed.
INFORMATION
The machine cannot be star-
ted, if the protective cover is not
closed.
Abb.1-4: Protective cover
Emergency-
stop push
button
seats for slot nuts
Protective
cover

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1.12.2 Drill chuck guard
Adjust the guard 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
drill chuck guard is not closed.
Abb.1-5: Drill chuck guard
1.13 Personal protective equipment
For some works you need personnel protective equipment as protective equipment. These are
Safety helmet,
protective glasses or face guard,
protective gloves,
safety shoes with steel toe caps,
ear protection.
Before starting work make sure that the required personnel protective equipment is available at
the work place.
CAUTION!
Dirty or contaminated personnel protective equipment can cause illness.
Clean your personal protective equipment
after each use,
regularly once a week.
Personal protective equipment for special works
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.
1.14 Safety during operation
We provide information about the specific dangers when working with and on the drilling
machine in the descriptions for these types of work.
WARNING!
Before switching on the drilling machine make sure that there are
no dangers generated for persons,
Clamping screw
Drill chuck guard

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no objects are damaged.
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, ope-
ration, maintenance and repair.
Do not work on the drilling machine if your concentration is reduced, for example, because
you are taking medication.
Observe the accident prevention regulations issued by your Employers Liability Insurance
Association or other supervisory authorities applicable to your company.
Inform the supervisor about all hazards or faults.
Stay on the drilling machine until the machine completely stopped moving.
Use the specified personal protective equipment. Ensure you wear close-fitting clothing
and, if necessary, a hairnet.
Do not use protective gloves when drilling.
1.15 Safety during maintenance
Inform the operators in good time of any maintenance and repair works.
Report all safety relevant changes and performance details of the drilling machine or their ope-
rational behavior. Any changes must be documented, the operating instructions updated and
machine operators instructed accordingly.
1.15.1 Disconnecting and securing the drilling machine
Switch off the drilling machine with the main switch and secure the main switch with a padlock
against unauthorised switching-on or switching-on by accident.
All machine parts as well as all dangerous voltages are switched off. Excepted are only the
positions which are marked with the adjoining pictogram.
1.16 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 that the lifting and load suspension gear
they have sufficient load carrying,
and that it is 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 properly. Never walk under suspended loads!
1.16.1 Mechanical maintenance
Reinstall all protection and safety devices after any maintenance work once the work has been
completed.This includes:
covers,
safety instructions and warning signs,
grounding cables.
Check if they are working properly!

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1.17 Accident report
Inform your supervisors and Optimum Maschinen Germany GmbH immediately in the event of
accidents, possible sources of danger and any actions which almost led to an accident (near
misses).
There are many possible causes for "near misses".
The sooner they are notified, the quicker the causes can be eliminated.
1.18 Electrical system
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. Disconnect the machine immediately if there is a malfunction in the
power supply!
Comply with the required inspection intervals in accordance with the factory safety directive,
operating equipment inspection DGUV, formerly BVG.
The operating company responsible for 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 certain intervals.
The deadlines must be set so that arising, foreseeable defects can be detected in a timely man-
ner.
The relevant electro-technical rules must be followed during the inspection.
The inspection prior to initial commissioning is not required if the operator receives confirma-
tion from the manufacturer or installer that the electrical systems and operating equipment com-
ply with the accident prevention regulations, see conformity declaration.
Permanently installed electrical systems and operating equipment are considered constantly
monitored if they are continually serviced by qualified electricians and inspected by means of
measurements in the scope of operation (e.g. monitoring the insulation resistance).
1.19 Inspection deadlines
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.

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2 Technical specification
The following information represents the dimensions and indications of weight and the manu-
facturer‘s approved machine data.
2.1 Electrical connection B24H B28H
Connection
230V ~50 Hz
850 W -
400V ~50 Hz
850 W
400V ~50 Hz
850 W
B24HV B28HV
230V ~50 Hz
1.5 kW
230V ~50 Hz
1.5 kW
2.2 Drilling capacity B24H - B24HV B28H - B28HV
Drilling capacity in steel [mm] 20 28
Throat [mm] 165 200
Spindle sleeve stroke [mm] 85 105
2.3 Spindle seat B24H - B24HV B28H - B28HV
Spindle seat MT 2 MT 3
2.4 Drilling table B24H - B24HV B28H - B28HV
Table size [mm]
T-slot size [mm] 14
Maximum distance [mm]
spindle - table 515 860
Maximum distance [mm]
spindle - stand 681 1274
Working surface stand [mm]
Length x Width of the working surface 280 x 260 320 x 320
370 x 320 (Vario)
2.5 Required space B24H - B24HV B28H - B28HV
Height [mm] 1850 2000
224,00
280,00
244,00
300,00
272,00
340,00
358,00
290,00

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2.10 Emissions
Maximum sound pressure level at 1 m distance from the machine and 1.60 m above the ground
is 76 dB(A) when idling.
If the drilling is installed in an area where various machines are in operation, the noise expo-
sure (immission) on the operator of the drilling 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:
Depth [mm] 1700 1800
Width [mm] 1500 1600
Weight [kg] 92 - 96 166
2.6 Speeds type H B24H B28H
Spindle speeds [ min-1 ] 350 - 4000 120 - 4000
Number of stages 7 16
2.7 Speeds type HV B24HV B28HV
Spindle speeds [ min-1 ] 100 - 5950 35 -5600
Number of stages 4 12
2.8 Environmental
conditions B24H - B24HV B28H - B28HV
Temperature 5 - 35 °C
Relative humidity 25-80%
2.9 Operating material B24H - B24HV B28H - B28HV
Toothed rod commercial lubricating grease
Drill column Acid-free lubricant, e.g. machine oil,
engine oil
2.5 Required space B24H - B24HV B28H - B28HV