Optimum B 24 H User manual

GB
OPTIMUM
MASCHINEN - GERMANY
Operating manual
Version 2.2.2
Bench drilling machine
Upright drilling machine

OPTIMUM
MASCHINEN - GERMANY
Version 2.2.2 dated 2014-03-07Page 2 Original operating instructions
B24H | B24HV | B28H | B28HVGB
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 misuses.............................................................................................................9
1.3.1 Avoiding misuses......................................................................................................................................9
1.4 Possible dangers caused by the drilling machine.....................................................................................9
1.5 Qualification of personnel.......................................................................................................................10
1.5.1 Target group...........................................................................................................................................10
1.5.2 Authorized persons.................................................................................................................................11
1.6 Operator positions ..................................................................................................................................12
1.7 Safety measures during operation..........................................................................................................12
1.8 Safety devices ........................................................................................................................................12
1.9 Safety check...........................................................................................................................................13
1.10 EMERGENCY-STOP push button..........................................................................................................14
1.11 Drilling table............................................................................................................................................14
1.12 Separating protective devices.................................................................................................................14
1.12.1 Protective cover of the V-belts................................................................................................................14
1.12.2 Drill chuck protection ..............................................................................................................................15
1.13 Individual protection gear........................................................................................................................15
1.14 Safety during operation...........................................................................................................................16
1.15 Safety during maintenance.....................................................................................................................16
1.15.1 Disconnecting and securing the drillnig machine....................................................................................16
1.16 Using lifting equipment ...........................................................................................................................16
1.16.1 Mechanical maintenance work ...............................................................................................................17
1.17 Accident report........................................................................................................................................17
1.18 Electrical system.....................................................................................................................................17
2 Technical data
2.1 Electrical connection...............................................................................................................................18
2.2 Drilling capacity.......................................................................................................................................18
2.3 Spindle seat............................................................................................................................................18
2.4 Drilling table............................................................................................................................................18
2.5 Required space.......................................................................................................................................18
2.6 Speeds type H........................................................................................................................................18
2.10 Emissions ...............................................................................................................................................19
2.7 Speeds type HV......................................................................................................................................19
2.8 Environmental conditions........................................................................................................................19
2.9 Operating material..................................................................................................................................19
2.11 Dimensions B24H...................................................................................................................................20
2.12 Dimensions B24HV.................................................................................................................................21
2.13 Dimensions B24H...................................................................................................................................22
2.14 Dimensions B24HV.................................................................................................................................23
3 Assembly
3.1 Scope of delivery....................................................................................................................................24
3.2 Transport ................................................................................................................................................24
3.3 Storage...................................................................................................................................................25
3.4 Installation and assembly .......................................................................................................................26
3.4.1 Requirements to the installation site.......................................................................................................26
3.5 Assembly................................................................................................................................................27
3.5.1 Mounting of base and drill column..........................................................................................................27

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Version 2.2.2 dated 2014-03-07 Page 3Original operating instructions
B24H | B24HV | B28H | B28HV GB
3.5.2 Assembly of the drilling machine table B24H - B24HV ..........................................................................28
3.5.3 Assembly of the drilling machine table B24H - B24HV ..........................................................................28
3.5.4 Fitting the drill head................................................................................................................................30
3.6 Installation..............................................................................................................................................31
3.6.1 Fixing......................................................................................................................................................31
3.6.2 Installation drawings...............................................................................................................................32
3.7 First commissioning................................................................................................................................34
3.7.1 Warming up the machine .......................................................................................................................34
3.7.2 Electrical connection ..............................................................................................................................35
4Operation
4.1 Safety.....................................................................................................................................................36
4.2 Control and indicating elements.............................................................................................................36
4.2.1 Drilling machine B24H - B24HV.............................................................................................................36
4.2.2 Drilling machine B28H - B28HV............................................................................................................37
4.2.3 Drilling machine B24H - B24HV.............................................................................................................38
4.2.4 Control panel B28H - B28H (Vario)........................................................................................................38
4.3 Turn the machine on B24H / B28H ........................................................................................................40
4.4 Turn the machine on B24HV / B28HV....................................................................................................40
4.5 Turn the machine off B24H / B28H ........................................................................................................40
4.6 Turn the machine off B24H / B28H ........................................................................................................40
4.7 Speed variation ......................................................................................................................................41
4.7.1 Speed table B24H..................................................................................................................................41
4.7.2 Speed table B24HV................................................................................................................................42
4.7.3 Speed table B28H..................................................................................................................................42
4.7.4 Speed table B28HV................................................................................................................................43
4.8 Drill depth stop .......................................................................................................................................43
4.9 Disassembly, assembly of drill chucks and drill bits...............................................................................44
4.9.1 Use of Quick action drill chuck...............................................................................................................44
4.9.2 Disassembly of the drill chuck B24H - B24HV .......................................................................................44
4.9.3 Disassembly with the integrated drill drift on the B28H- B28HV ............................................................45
4.9.4 Mounting the drill chuck B24H - B24HV und B28H - B28HV .................................................................46
4.10 Cooling...................................................................................................................................................46
4.11 Before starting work ...............................................................................................................................47
4.12 During work............................................................................................................................................47
5 Determining the cutting speed and the speed
5.1 Table cutting speeds / infeed .................................................................................................................49
5.2 Speed table............................................................................................................................................49
5.3 Examples to calculatory determine the required speed for your drilling machine ..................................51
6 Maintenance
6.1 Safety.....................................................................................................................................................53
6.1.1 Preparation.............................................................................................................................................53
6.1.2 Restarting...............................................................................................................................................53
6.2 Inspection and maintenance ..................................................................................................................53
6.3 Repair.....................................................................................................................................................57
7 Ersatzteile - Spare parts
7.1 Ersatzteilzeichnung B24H - Spare parts drawing B24H.........................................................................58
7.1.1 Bohrkopf B24H - Drilling head B24H......................................................................................................58
7.1.2 Säule und Bohrtisch B24H - Column and drilling table B24H ................................................................59
7.1.3 Keilriemenscheiben B24H - Pulleys B24H .............................................................................................60
7.1.4 Ersatzteilliste B24H - Parts list B24H.....................................................................................................60
7.2 B24HV....................................................................................................................................................63
7.2.1 Bohrkopf B24HV - Drilling head B24HV.................................................................................................63
7.2.2 Säule und Bohrtisch B24HV - Column and drilling table B24HV............................................................64
7.2.3 Keilriemenscheiben B24HV - Pulleys B24HV ........................................................................................65

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Version 2.2.2 dated 2014-03-07Page 4 Original operating instructions
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7.2.4 Ersatzteilliste B24HV - Parts list B24HV.................................................................................................65
7.3 Maschinenschilder - Machine labels B24H.............................................................................................68
7.3.1 Maschinenschilder - Machine labels B24H.............................................................................................68
7.4 Maschinenschilder - Machine labels B24H Vario ...................................................................................69
7.4.1 Maschinenschilder - Machine labels B24H Vario ...................................................................................69
7.5 Schaltplan - Wiring diagram B24H - 230 V.............................................................................................70
7.6 Schaltplan - Wiring diagram B24H - 400V..............................................................................................71
7.7 Schaltplan - Wiring diagram B24HV.......................................................................................................72
7.8 Ersatzteilzeichnung B28H - Spare parts drawing B28H.........................................................................73
7.8.1 Bohrkopf B28H - Drilling head B28H......................................................................................................73
7.8.2 Säule und Bohrtisch B28H - Column and drilling table B28H.................................................................74
7.8.3 Keilriemenscheiben B28H - Pulleys B28H..............................................................................................75
7.8.4 Ersatzteilliste B28H - Parts list B28H......................................................................................................75
7.9 Ersatzteilzeichnung B28HV - Explosion drawing B28HV .......................................................................78
7.9.1 Bohrkopf B28HV - Drilling head B28HV .................................................................................................78
7.9.2 Säule und Bohrtisch B28HV - Column and drilling table B28HV............................................................79
7.9.3 Keilriemenscheiben B28HV - Pulleys B28HV.........................................................................................80
7.10 Ersatzteilliste B28HV - Parts list B28HV.................................................................................................80
7.11 Maschinenschilder - Machine labels B28H.............................................................................................84
7.11.1 Maschinenschilder - Machine labels - B28H...........................................................................................84
7.12 Maschinenschilder - Machine labels - B28HV ........................................................................................85
7.12.1 Maschinenschilder - Machine labels - B28HV........................................................................................85
7.13 Schaltplan - Wiring diagram - B28H - 400V............................................................................................86
7.14 Schaltplan - Wiring diagram - B28HV 1-2...............................................................................................87
7.15 Schaltplan - Wiring diagram - B28HV 2-2...............................................................................................88
8 Malfunctions
9 Appendix
9.1 Copyright ................................................................................................................................................91
9.2 Terminology/Glossary.............................................................................................................................91
9.3 Change information operating manual....................................................................................................91
9.4 Liability claims for defects / warranty......................................................................................................92
9.5 Note regarding disposal / options to reuse:............................................................................................92
9.5.1 Decommissioning ...................................................................................................................................93
9.5.2 Disposal of the packaging of new devices..............................................................................................93
9.5.3 Disposing of the old device.....................................................................................................................93
9.5.4 Disposal of electrical and electronic components...................................................................................93
9.5.5 Disposal of lubricants and coolants ........................................................................................................94
9.6 Disposal via municipal collection............................................................................................................94
9.7 RoHS , 2002/95/CE................................................................................................................................94
9.8 Product follow-up....................................................................................................................................94

OPTIMUM
MASCHINEN - GERMANY
Version 2.2.2 dated 2014-03-07 Page 5Original operating instructions
B24H | B24HV | B28H | B28HV GB
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
Mail: [e-mail]
Internet: www.optimum-maschinen.com

OPTIMUM
MASCHINEN - GERMANY
Safety
Version 2.2.2 dated 2014-03-07Page 6 Original operating instructions
B24H | B24HV | B28H | B28HVGB
1 Safety
Glossary of symbols
This part of the operating instructions
explains the meaning and use of the warning notices included in these operating instruc-
tions,
defines the intended use of the drilling 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 legal regulations for accident prevention,
the prohibition, warning and mandatory signs as well as the warning labels on the drilling
machine.
Always keep this documentation close to the drilling machine.
INFORMATION
If you are unable to solve a problem using these operating instructions, please contact us for
advice:
Optimum Maschinen Germany GmbH
Dr. Robert-Pfleger-Str. 26
D-96103 Hallstadt
email: [e-mail]
1.1 Safety instructions (warning notes)
1.1.1 Classification of hazards
We classify the safety warnings into various levels. The table below gives an overview of the
classification of symbols (ideogram) and the warning signs for each specific danger and its
(possible) consequences.
gives further advice
calls on you to act
enumerations
Ideogram Warning alert Definition / consequence
DANGER! Threatening danger that will cause serious injury or death to people.
WARNING! A danger that might cause severe injury to the staff or can lead to death.
CAUTION!
Danger of unsafe procedure that might cause injury to the staff or property
damages.

OPTIMUM
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Safety
Version 2.2.2 dated 2014-03-07 Page 7Original operating instructions
B24H | B24HV | B28H | B28HV GB
1.1.2 Other pictograms
ATTENTION!
Situation that could cause damage to the drilling machine and products and
other types of damage.
No risk of injury to people.
Information
Application tips and other important or useful information and notes.
No dangerous or harmful consequences for people or objects.
Ideogram Warning alert Definition / consequence
In case of specific dangers, we replace the pictogram by
or
general danger by a warning of injury of hands, hazardous electri-
cal voltage, rotating parts.
Warning of danger of slip-
ping! Warning risk of stumbling! Warning hot surface! Warning biological hazard!
Warning of automatic start-
up! Warning tilting danger! Warning of suspended loads! Caution, danger of explo- sive substances!
Activation forbidden! rise to the machine prohib-
ited Read the operating instruc- tions before commission-
ing!
Disconnect the mains plug!
Use protective glasses! Use protective gloves! Use protective boots! Use protective suit!

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Safety
Version 2.2.2 dated 2014-03-07Page 8 Original operating instructions
B24H | B24HV | B28H | B28HVGB
1.2 Intended use
WARNING!
In the event of intended use of the drilling machine
will endanger personnel,
the machine and other material property of the operating company will be endan-
gered,
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 is designed and manufactured for holes in cold metals or other non flammable 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 the
approval of the company Optimum Maschinen Germany GmbH then the drilling 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 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 you
observe the limits of the drilling machine,
the operating manual is observed,
the inspection and maintenance instructions are observed.
 "Technical data“ on page 18
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 staff and cause damage to the drilling
machine.
INFORMATION
The drilling machine B24HV and B28HV is built according to the standard DIN EN 55011 class
A.
WARNING!
The class A (machine tools) is not intended to be used in residential facilities, where the
power is supplied 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.
ATTENTION!
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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Safety
Version 2.2.2 dated 2014-03-07 Page 9Original operating instructions
B24H | B24HV | B28H | B28HV GB
1.3 Reasonably foreseeable misuses
Any other use as the one determined under the "Intended use" or any use beyond the
described use shall be deemed as not in conformity and is forbidden.
Any other use has to 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 misuses it is necessary to read and understand the operating instructions
before the first commissioning.
The operators must be qualified.
1.3.1 Avoiding misuses
Use of suitable cutting tools.
Adapting the speed adjustment and feed to the material and workpiece.
Clamp workpieces firmly and vibration-free.
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 workpieces flying off.
Clamp the workpiece in the machine vice. Make sure that the workpiece is firmly clamped in the
machine vice resp. that the machine vice is firmly clamped on 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.
Correctly adjust the bearing clearance and the guidings.
It is recommended:
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
in case of too strong pressure the drill will get worn early or even might break resp. get
jammed in the hole. If the drill gets jammed immediately stop the main motor by pressing
the emergency stop button,
for hard materials, e.g. steel, use commercial cooling / lubricating agents,
generally always drive the turning spindle out of the workpiece.
1.4 Possible dangers caused by the drilling machine
The drilling machine is state-of-the-art.
Nevertheless, there is a residual risk as the drilling machine operates with
at high speeds,
rotating parts,
with electrical voltages and currents.
We have used construction resources and safety techniques to minimize the health risk to per-
sons resulting from these hazards.

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Version 2.2.2 dated 2014-03-07Page 10 Original operating instructions
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If the drilling machine is used and maintained by the staff who are not duly qualified, there may
be a risk resulting from incorrect or unsuitable maintenance of the drilling machine.
INFORMATION
Everyone involved in the assembly, commissioning, operation and maintenance must
be duly qualified,
strictly follow these operating instructions.
In the event of improper use
there may be a risk to the staff,
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, and upright drill if cleaning or maintenance work is
beingcarried out.
WARNING!
The drilling machine may only be used 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 have to be equipped with the prescribed
safety devices.
This is your responsibility being the operating company!
 "Safety devices“ on page 12
1.5 Qualification of personnel
1.5.1 Target group
This manual is addressed to
the operating companies,
the users,
the staff for maintenance works.
Therefore, the warning notes refer to both, operation and maintenance staff of the drilling
machine.
Determine clearly and explicitly who will be responsible for the different activities on the
machine (operation, 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 staff.
The qualifications of the staff 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. Any tasks which need to be performed beyond the opera-
tion in the standard mode must only be performed by the operator if it is indicated in these
instructions and if the operating company expressively commissioned the operator.
Electrical specialist
Due to his professional training, knowledge and experience as well as his knowledge of respec-
tive standards and regulations the electrical specialist is able to perform works on the electrical
system and to recognise and avoid any possible dangers himself.

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Safety
Version 2.2.2 dated 2014-03-07 Page 11Original operating instructions
B24H | B24HV | B28H | B28HV GB
The electrical specialist is specially trained for the working environment in which he is working
and knows the relevant standards and regulations.
Specialist staff
Due to his professional training, knowledge and experience as well as his knowledge of rele-
vant regulations the specialist staff is able to perform the assigned tasks and to recognise and
avoid any possible dangers himself.
Instructed persons
Instructed persons were instructed by the operating company about the assigned tasks and any
possible risks in case of improper behaviour.
1.5.2 Authorized persons
WARNING!
Inappropriate operation and maintenance of the drilling machine constitutes a danger for
the staff, objects and the environment.
Only authorized staff may operate the drilling machine !
Persons authorized to operate and maintain should be trained technical staff and instructed by
the ones who are working for the operating company and for the manufacturer.
The operating company must
Obligations of
the operating
company
train the staff,
instruct the staff in regular intervals (at least once a year) on
- all safety standards that apply to the machine,
- the operation,
- accredited technical guidelines,
check staff‘s state of knowledge,
document the trainings/instructions,
require staff to confirm participation in training/instructions by means of a signature,
check whether the staff is working safety- and risk-conscious and observe the operating
instructions.
The operator must
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
regarding the
qualification
For work on the following parts there are additional requirements:
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, following measures are to be
performed in the following order.
- Disconnect all poles.
- Secure against switching on.
- Check if the machine is zero potential.

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Version 2.2.2 dated 2014-03-07Page 12 Original operating instructions
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1.6 Operator positions
The operator’s position is in front of the drilling
machine.
Img.1-1: Operator positions
1.7 Safety measures during operation
CAUTION!
Risk due to inhaling of health hazardous dusts and mist.
Dependent on the material which need to be processed and the used auxiliaries dusts
and mist may be caused which might impair you health.
Make sure that the generated health hazardous dusts and mist are safely sucked off at
the point of origin and is dissipated or filtered from the working area. To do so, use a
suitable extraction unit.
CAUTION!
Risk of fire and explosion by using flammable materials or cooling lubricants.
Before processing inflammable materials (e.g. aluminium, magnesium) or using
inflammable auxiliary materials (e.g. spirit) it is necessary to take additional preventive
measures in order to safely avoid health risks.
1.8 Safety devices
Use the drilling machine only with properly functioning safety devices.
Stop the drilling machine immediately if there is a failure on the safety device or if it is not func-
tioning for any reason.
It is your responsibility!
If a safety device has been activated or has failed, the drilling machine must only be used if you
have removed the cause of the failure,
have verified that there is no danger resulting for the staff or objects.
WARNING!
If you bypass, remove or deactivate a safety device in any other way, you are
endangering yourself and other staff working with the drilling machine. The possible
consequences are:
injuries may occur due to workpiece or parts of workpieces flying off,
contact with rotating parts,
fatal electrocution.
WARNING!
The separating protective equipment which is made available and delivered together
with the machine is designed to reduce the risk of workpieces or fractions of them which

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MASCHINEN - GERMANY
Safety
Version 2.2.2 dated 2014-03-07 Page 13Original operating instructions
B24H | B24HV | B28H | B28HV GB
being expelled, but not to remove them completely. Always work carefully and observe
the limit values of your chipping process.
The drilling machine machine includes 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, defect or change in operating function.
Check all safety devices
at the beginning of each shift (with the machine stopped),
once a week (with the machine in operation),
after every maintenance and repair work.
Check that prohibition, warning and information signs and the labels on the driling machine.
are legible (clean them, if necessary),
are complete (replace if necessary).
INFORMATION
Use the following table in order to organize the checks.
General check
Equipment Check OK
Protective covers Mounted, firmly bolted and not damaged
Signs,
Markings Installed and legible
Date: checked by (signature):
Functional check
Equipment Check OK
EMERGENCY-STOP
Push button After actuating an 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 protection The drilling machine must only be switched on, if the drill chuck
protection is closed. The engine must switch off when the drill
chuck protection is opened during operation.
Date: checked by (signature):

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Version 2.2.2 dated 2014-03-07Page 14 Original operating instructions
B24H | B24HV | B28H | B28HVGB
1.10 EMERGENCY-STOP push button
ATTENTION!
Also after actuating the
EMERGENCY-STOP switch,
the drilling spindle is turn-
ing - depending on the pre-
viously selected speed - for
a few seconds more.
Img.1-2: EMERGENCY-STOP B24H (Vario), B28H
(Vario)
1.11 Drilling table
Seats for T-slots are attached
to the drilling table.
WARNING!
Risk of injury due to
workpieces flying off at
high speed. Securely fix the
workpiece on the drilling
table.
Img.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 drill-
ing head. A switch is integrated
in the protective cover which
monitors that the cover is
closed.
INFORMATION
You cannot start the machine if
the protective cover is not
closed.
Img.1-4: Protective cover
EMERGENCY-
STOP push but-
ton
seats for clamping
blocks
Protective
cover

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Safety
Version 2.2.2 dated 2014-03-07 Page 15Original operating instructions
B24H | B24HV | B28H | B28HV GB
1.12.2 Drill chuck protection
Adjust the protective equipment to
the correct height before you start
working.
To do so, detach the clamping screw,
adjust the required height and re-
tighten the clamping screw.
A switch is integrated in the fixture of
the spindle protection which moni-
tors that the cover is closed.
INFORMATION
You cannot start the machine if the
drill chuck protection is not closed.
Img.1-5: Drill chuck protection B24H
1.13 Individual protection gear
For certain work individual protection gear as protective equipment. This includes:
Safety helmet,
Protective goggles or face guard,
Protective gloves,
Safety shoes with steel toe caps,
Ear protection.
Before starting work, make sure that the prescribed individual protective equipment is available
in the workplace.
CAUTION!
Dirty or contaminated personnel protective equipment can cause diseases.
Clean your individual protection gear
after each use,
regularly, at least once a week.
Personal protective equipment for special works
Protect your face and eyes: Wear a safety helmet with facial protection when performing works
where your face and eyes are exposed to hazards.
Use protective gloves when handling pieces with sharp edges.
Use safety shoes when you assemble, disassemble or transport heavy components.
Clamping screw
Drill chuck protec-
tion

OPTIMUM
MASCHINEN - GERMANY
Safety
Version 2.2.2 dated 2014-03-07Page 16 Original operating instructions
B24H | B24HV | B28H | B28HVGB
1.14 Safety during operation
We specially point out the specific dangers when working with and on the drilling machine.
WARNING!
Before switching on the drilling machine make sure that there are
no dangers generated for persons,
not cause damage to equipment.
Avoid any risky working practices:
Make sure that nobody is endangered by your work.
The instructions mentioned in these operating instructions have to be strictly observed dur-
ing assembly, operation, 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 competent supervisory authority, responsible for your company.
Inform the supervisor about all endangerments or errors.
Stay on the drilling machine until the machine completely stopped moving.
Use the prescribed personnel protective equipment. Make sure to wear a well-fitting work
suit and, if necessary, a hairnet.
Do not use protective gloves when drilling or milling.
1.15 Safety during maintenance
Inform the operators in good time about any maintenance and repair works.
Report all safety relevant changes and performance details of the drilling machine or their oper-
ational behavior. Document all changes, have the operating instructions updated accordingly
and train machine operators.
1.15.1 Disconnecting and securing the drillnig 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 any 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 gear 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 competent supervisory authority, responsible for your
company.
Fasten the loads properly. Never walk under suspended loads!

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MASCHINEN - GERMANY
Safety
Version 2.2.2 dated 2014-03-07 Page 17Original operating instructions
B24H | B24HV | B28H | B28HV GB
1.16.1 Mechanical maintenance work
Remove or install protection and safety devices before starting any maintenance work and re-
install them once the work has been completed.This includes:
Covers,
Safety indications and warning signs,
Earth (ground) connections.
Check if they are working properly!
1.17 Accident report
Inform your superiors 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 faster the causes can be eliminated.
1.18 Electrical system
Have the machine and/or the electrical equipment checked regularly, at least every six months.
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.
Immediately disconnect the drilling machine if there are any anomalies in the power supply!
 "Maintenance“ on page 52

OPTIMUM
MASCHINEN - GERMANY
Technical data
Version 2.2.2 dated 2014-03-07Page 18 Original operating instructions
B24H | B24HV | B28H | B28HVGB
2 Technical data
The following information are the dimensions and indications of weight and the manufacturer‘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 (S235JR) [mm] 20 28
Working radius [mm] 165 200
Sleeve travel [mm] 85 105
2.3 Spindle seat B24H - B24HV B28H - B28HV
Spindle seat MT2 MT3
2.4 Drilling table B24H - B24HV B28H - B28HV
Table size [mm]
Length x Width of the working surface 280 x 300 340 x 360
T-slot size [mm] 14
Maximum distance [mm]
Spindle - table 515 858
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
Depth [mm] 1700 1800
Width [mm] 1500 1600
2.6 Speeds type H B24H B28H
Spindle speeds [ min -1 ] 350 - 4000 120 - 4000
Number of stages 7 16

OPTIMUM
MASCHINEN - GERMANY
Technical data
Version 2.2.2 dated 2014-03-07 Page 19Original operating instructions
B24H | B24HV | B28H | B28HV GB
2.10 Emissions
The emission of the drilling machine is below 76 dB(A).
If the is installed in an area where various machines are in operation the acoustic influence
immission) on the operator of the drilling machine may exceed 85 dB(A).
INFORMATION
This numerical value was measured on a new machine under proper operating conditions.
Depending on the age respectively on the wear of the machine it is possible that the noise
behaviour of the machine changes.
Furthermore, the factor of the noise emission is also depending on manufacturing influencing
factors, e.g. speed, material and clamping conditions.
INFORMATION
The mentioned numerical value is the emission level and 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 the proximity and the period of time during which the oper-
ator 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 shall allow the operator of the machine to more eas-
ily evaluate the endangering and risks.
CAUTION!
Depending on the overall noise exposure and the basic limit values the machine
operators must wear an appropriate hearing protection.
We generally recommend to use a noise protection and a hearing protection.
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
rel. humidity 25 - 80 %
2.9 Operating material B24H - B24HV B28H - B28HV
Toothed rack commercial lubricating grease
Drill column Acid-free lubricant, e.g. machine oil,
engine oil

OPTIMUM
MASCHINEN - GERMANY
Technical data
Version 2.2.2 dated 2014-03-07Page 20 Original operating instructions
B24H | B24HV | B28H | B28HVGB
2.11 Dimensions B24H
Img.2-1: Dimensions B24H