Centa CENTAFLEX-A CF-A-800-0 Series User manual

CENTAFLEX-A
Assembly and operating instructions
CF-A-800-0…3
M008-00077-EN
Rev. 1

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 2 / 51
Contents
1General remarks ..................................................................................... 5
2Safety ..................................................................................................... 6
2.1 Safety remarks.................................................................................6
2.1.1 Signal words.........................................................................6
2.1.2 Pictograms...........................................................................7
2.2 Qualification of deployed personnel .....................................................7
2.3 Intended application..........................................................................7
2.4 Application not in compliance with the intended use...............................9
3Delivery, transport, storage and disposal ............................................. 10
3.1 Delivery......................................................................................... 10
3.2 Transport....................................................................................... 10
3.3 Storage......................................................................................... 10
3.3.1 Storage location.................................................................. 11
3.3.2 Storage of couplings / flexible elements.................................. 11
3.4 Disposal ........................................................................................ 11
4Technical description ............................................................................ 12
4.1 Characteristics................................................................................ 12
4.2 Specifications................................................................................. 12
5Alignment of the units being connected................................................ 13
5.1 Axial alignment............................................................................... 13
5.2 Radial alignment............................................................................. 14
5.3 Angular alignment........................................................................... 15
6Mounting .............................................................................................. 16
6.1 General assembly instructions .......................................................... 16
6.2 Mounting the coupling according to the supplied type........................... 18
6.3 Mounting the hub (type 1) and flange hub (type 2).............................. 19
6.3.1 Mounting the hub/flange hub with cylindrical drilling and
feather key ........................................................................ 20
6.3.2 Mounting the hub/flange hub with conical drilling and feather
key ................................................................................... 22
6.3.3 Mounting the hub/flange hub with toothing............................. 23
6.3.4 Mounting the CENTALOC clamping hub/flange hub................... 24
6.3.5 Mounting the CENTA-conical clamping hub/flange hub.............. 26
6.3.6 Mounting the hub/flange hub with conical oil interference fit...... 28
6.4 Mounting the flange (type 3) ............................................................ 31
6.5 Positioning the rubber element ......................................................... 32
6.6 Aligning the units............................................................................ 32

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 3 / 51
6.7 Mounting the rubber element............................................................ 33
6.7.1 Mounting the axial screws .................................................... 33
6.7.2 Mounting the radial screws ................................................... 36
6.8 After completed mounting................................................................ 37
7Operation.............................................................................................. 38
7.1 Operating faults, root causes and remedy........................................... 38
7.2 Admissible overall misalignment of the coupling .................................. 38
8Care and maintenance .......................................................................... 39
8.1 Work to be performed ..................................................................... 39
8.1.1 Cleaning the coupling........................................................... 39
8.1.2 Visual inspection of the coupling............................................ 39
8.1.3 Visual inspection of the rubber element.................................. 40
8.1.4 Inspection of the screw connections....................................... 40
8.2 Replace defective parts.................................................................... 41
9Dismantling .......................................................................................... 42
9.1 General dismantling instructions ....................................................... 42
9.2 Dismantling the rubber element........................................................ 43
9.2.1 Dismantling the radial screws................................................ 43
9.2.2 Dismantling the axial screws................................................. 44
9.2.3 Dismantling the rubber element ............................................ 45
9.3 Dismantling the flange (if necessary)................................................. 45
9.4 Dismantling the hub/flange hub (if necessary) .................................... 46
9.4.1 Dismantling the hub/flange hub with cylindrical drilling and
feather key ........................................................................ 46
9.4.2 Dismantling the hub/flange hub with conical drilling and
feather key ........................................................................ 46
9.4.3 Dismantling the hub/flange hub with toothing ......................... 46
9.4.4 Dismantling the CENTALOC clamping hub/flange hub ............... 46
9.4.5 Dismantling the CENTA-conical clamping hub/flange hub .......... 47
9.4.6 Dismantling the hub/flange hub with conical oil interference
fit ..................................................................................... 47
9.5 Reassembling the coupling............................................................... 48
10 Wearing and spare parts....................................................................... 49
11 Annex ................................................................................................... 50
11.1 CENTA data sheet D13-019 (IP-screw connections).............................. 50
11.2 CENTA data sheet D008-900, Declaration of incorporation according
to the EC Machinery Directive 2006/42/EC, Appendix II B..................... 51

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 4 / 51
Index of illustrations
Fig. 5-1 Axial alignment........................................................................... 13
Fig. 5-2 Radial alignment......................................................................... 14
Fig. 5-3 Angular alignment....................................................................... 15
Fig. 6-1 Mounting the hub/flange hub with cylindrical drilling and feather key.. 20
Fig. 6-2 Mounting the hub/flange hub with conical drilling and feather key...... 22
Fig. 6-3 Mounting the hub/flange hub with toothing..................................... 23
Fig. 6-4 Mounting the CENTALOC clamping hub/flange hub........................... 24
Fig. 6-5 Mounting the CENTA-conical clamping hub/flange hub...................... 26
Fig. 6-6 Mounting the hub/flange hub with conical oil interference fit ............. 28
Fig. 6-7 Mounting the flange (type 3) ........................................................ 31
Fig. 6-8 Positioning the rubber element...................................................... 32
Fig. 6-9 Mounting the axial screws ............................................................ 33
Fig. 6-10 Mounting the axial screws with the help of the mounting fixture....... 34
Fig. 6-11 Mounting the radial screws ......................................................... 36
Fig. 8-1 Examples of wear zones at the CF-A rubber element indicated by
arrows....................................................................................... 40
Fig. 9-1 Dismantling the axial screws with the help of the mounting fixture..... 44
Index of tables
Table 2-1 Shape and size of ventilation holes................................................ 8
Table 6-1 Overview of possible hub/flange hub design ................................. 19
Table 6-2 Tightening torques for threaded pins........................................... 21
Table 7-1 Troubleshooting table................................................................ 38

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 5 / 51
1General remarks
These assembly and operating instructions form a constituent part of the
coupling delivery and must be kept in an easily accessible place at all times.
CENTA products are developed and produced to quality standard
DIN EN ISO 9001:2000.
In the interests of further development, CENTA reserves the right to make
technical changes.
IMPORTANT
CENTA is unable to accept liability for damage and operating faults caused by failure to
observe the operating instructions.
These operating instructions are protected under copyright to CENTA Antriebe
Kirschey GmbH.
In case of technical questions, please enquire with our head office:
CENTA Antriebe
Kirschey GmbH
Bergische Strasse 7
42781 Haan
GERMANY
Phone [phone]
Fax [phone]
[email protected]
www.centa.info

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 6 / 51
2Safety
The purpose of these operating instructions is to enable users to:
•use the coupling safely and correctly
•maximize efficiency
•ensure that care and maintenance are carried out correctly
For this reason, these operating instructions must be thoroughly read and
understood prior to work on and with the coupling.
WARNING
Injury and material damage can occur as a result of:
Failure to adhere to the safety and accident prevention regulations
valid at the relevant installation site
The safety and accident prevention regulations valid at the installation
site in question must be adhered to when performing any of the tasks
described in these operating instructions.
2.1 Safety remarks
In these operating instructions, safety remarks are indicated by a pictogram and
a signal word.
2.1.1 Signal words
The following signal words are used in the safety remarks:
DANGER Denotes the immediate threat of danger. If not prevented, fatal or extremely serious injuries can result.
WARNING Denotes a potentially dangerous situation. If not prevented, fatal or extremely serious injuries can result.
CAUTION Denotes a potentially dangerous situation. If not prevented, minor injuries and/damage to property may result.
IMPORTANT Denotes application tips and particularly useful information. This is not a signal word denoting a dangerous or damaging situation.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 7 / 51
2.1.2 Pictograms
Possible pictograms in the safety precautions:
Warning of a hazardous area
Do not switch
Use protective gloves
Use protective goggles
2.2 Qualification of deployed personnel
All the work described in these operating instructions may only be performed by
authorized persons with adequate training and instruction.
WARNING
Injury and material damage can occur as a result of:
Work at the coupling which is not described in these instructions
Only carry out work which is described in these operating instructions.
2.3 Intended application
WARNING
Injury and material damage can occur as a result of:
Application not in compliance with the intended use
The couplings are intended exclusively for use in accordance with the
relevant design. They may only be used under the specified conditions.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 8 / 51
WARNING
Injuries can occur as a result of:
Contact with rotating parts
Shield the coupling in accordance with the applicable accident
prevention regulations with an enclosure.
Exception:
The coupling is encased by the driving and driven units.
The scope of delivery provided by CENTA does not include a protective
enclosure.
This enclosure must fulfil the following criteria:
•Provide protection against persons gaining access to rotating parts
•Restrain any rotating parts which may be work loose
•Guarantee sufficient ventilation for the coupling
This enclosure must be made of stable steel components. In order to ensure
adequate ventilation for the coupling, the enclosure must be fitted with regular
openings. For safety reasons, these openings must not exceed the dimensions
outlined in table 2-1.
Component Circular openings
[mm] Rectangular openings [mm]
Top of the enclosure Ø 8 8
Side elements of the
enclosure Ø 8 8
Table 2-1 Shape and size of ventilation holes
The enclosures must be positioned a minimum of 15 mm distant from rotating
parts. The enclosure must be electrically conductive and be included in the
equipotential bonding.
Before commencing long-term operation, the plant must successfully complete a
test run.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 9 / 51
2.4 Application not in compliance with the intended use
WARNING
Injury and material damage can occur as a result of:
Inadmissibly high torque
Inadmissibly high or low speeds
Exceeding the specified ambient temperature
Inadmissible ambient medium
Inadmissible coupling enclosure
Exceeding the admissible overall misalignment values
Only use the coupling for the specified application.
CENTA bears no liability for damage resulting from application not in compliance
with the intended use of the equipment.
Should there be a change of plant parameters, the coupling design must be
reviewed by CENTA (address see chapter 1).

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 10 / 51
3Delivery, transport, storage and disposal
3.1 Delivery
After delivery, the coupling:
•must be checked for completeness and correctness of the delivery.
•must be examined for possible transport damage (which must be reported
immediately to the carrier).
3.2 Transport
CAUTION
Injury and material damage can occur as a result of:
Incorrect transportation of couplings
Ensure that the coupling is correctly transported.
CAUTION
Material damage to coupling components can occur as a result
of:
Contact with sharp-edged objects
Protect coupling components for transportation.
Only hoist coupling components with nylon belts or ropes.
Always cushion parts when supporting them from below.
Following transportation damage:
•Check the coupling carefully for damage.
•Consult the manufacturer (Address see chapter 1).
3.3 Storage
CAUTION
Material damage to elastic elements and rubber parts can occur
as a result of:
Incorrect storage
These parts must be stored laid flat and so they cannot distort, and
protected from ozone, heat, light, moisture and solvents.
IMPORTANT
Rubber parts are marked where possible with their production date. From this date,
they may only be stored for a maximum of 5 years.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 11 / 51
3.3.1 Storage location
Requirements imposed on the storage location:
•Moderately ventilated and low in dust
•Dry (max. 65% humidity)
•Temperature stabilized (-10°C to +25°C)
•Free of ozone-producing devices such as light sources and electric motors
•Free of UV light sources and direct sunlight
•Do not store solvents and disinfectants, fuels or lubricants, acids, chemicals
etc. in the same location
For more details, refer to DIN 7716.
3.3.2 Storage of couplings / flexible elements
¾Unpack the parts.
¾Check the packaging for damage. Replace if necessary.
¾Check that the wax protection on steel components is intact. If necessary,
patch or renew.
¾Package the parts (for prolonged periods of storage, enclose desiccant and
weld into film).
¾Place the parts into storage.
3.4 Disposal
RECYCLING
Ensure safe, environmentally responsible disposal of operating supplies
and exchange parts. For this, locally provided recycling facilities and
regulations must be utilized.
For disposal, the coupling parts must be separated where possible and sorted
according to material type.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 12 / 51
4Technical description
4.1 Characteristics
CENTAFLEX-A couplings are proven, extremely simple, versatile and offer good
torsional flexibility.
•Simple, compact smooth-faced design.
•Low weight, low moment of inertia.
•High output, high admissible speeds, large bores permitted, rupture-proof
•Large angle of twist with almost linear curve
(appr. 6-8° at nominal torque).
•High elasticity and considerable flexibility in any direction (radial, axial,
angular) with low counter forces acting on shafts and bearings.
•The CENTAFLEX coupling has a shock and vibration absorbing action.
•Torque transmission is absolutely free of play, uniform, silent and electrically
insulating.
•The coupling is low-maintenance. The rubber parts are not subject to wear,
resulting in a long service life and no generation of dirt (rubber particles).
•The rubber element is air flushed all round, resulting in good dissipation of
the generated heat. The rubber element remains cool.
•By slackening the radial screws, the drive can be conveniently separated and
rotated without dismantling.
•Because of the torque, no axial reaction forces at all are applied to the shaft
and bearings.
•The rubber elements are available in a number of different shore hardnesses.
•This allows the torsional stiffness to be varied within wide limits and so
adjusted to the vibration-specific requirements.
•Material: Normal version: Natural rubber, capable of withstanding dynamic
loads and temperature resistant.
4.2 Specifications
The specifications can be found in the catalogue and the dimensions in the
installation drawing.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 13 / 51
5Alignment of the units being connected
5.1 Axial alignment
Fig. 5-1 Axial alignment
Item Info Designation Remark
1 Rubber element
2 Hub
6/9 Flange hub/Flange
B Flange Customer part
C Hub Customer part
¾Determine the installation dimension Sfrom the installation drawing.
¾Align the units axially (installation dimension = S±∆KA max).
Permissible axial alignment tolerance: ∆KA max=±1.0 mm

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 14 / 51
5.2 Radial alignment
Fig. 5-2 Radial alignment
Item Info Designation Remark
1 Rubber element
2 Hub
6/9 Flange hub/Flange
B Flange Customer part
C Hub Customer part
¾Determine the radial misalignment (see Fig 5-2).
¾Align the units (calculated deviation ≤∆KR max).
Permissible radial alignment tolerance: ∆KR max=0.5 mm

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 15 / 51
5.3 Angular alignment
Fig. 5-3 Angular alignment
Item Info Designation Remark
1 Rubber element
2 Hub
6/9 Flange hub/Flange
B Flange Customer part
C Hub Customer part
¾Determine the angular misalignment (see Fig. 5-3).
¾Align the units (calculated deviation ≤∆KW max).
Permissible angular alignment tolerance: ∆KW max=0.3°

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 16 / 51
6Mounting
6.1 General assembly instructions
Any work method which impairs the safety of the coupling is prohibited.
The user undertakes to notify the manufacturer immediately of any changes
occurring at the coupling which could impair safety (address see chapter 1).
WARNING
Injuries can occur as a result of:
Contact with rotating parts
Before starting work at the coupling, switch off the plant and secure
against unintentional start-up.
WARNING
Injury and material damage can occur as a result of:
Assembly of the coupling in the wrong sequence
Only ever assemble the coupling in the described sequence.
WARNING
Injury and material damage can occur as a result of:
Falling coupling components
Secure coupling components against falling to the floor.
CAUTION
Material damage to coupling components can occur as a result
of:
Contact with sharp-edged objects
Protect coupling components for transportation.
Only hoist coupling components with nylon belts or ropes.
Always cushion parts when supporting them from below.
CAUTION
Material damage can occur as a result of:
Soiled joint surfaces
The surfaces that are to be joined must be free of dirt, preservatives
and lubricants.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 17 / 51
CAUTION
Material damage to coupling components can occur as a result
of:
Anaerobic adhesives (e.g. Loctite) used for screw locking
This type of screw locking medium may not be in contact with rubber
parts.
IMPORTANT
•Screw preparation and tightening torque levels in accordance with CENTA data
sheet D13-019 (see chapter 11.1).
•The tightening torques for the threaded pins of hubs / flange hubs according to see
installation drawing.
•Use suitable lifting devices for assembly .
•Elements for connection of the coupling to customer components do not form part
of the delivery.
•The following assembly stages are described for coupling CF-A-800.
•Part illustration and marking may slightly differ from installation drawing and
delivery state.
IMPORTANT
Use exclusively new screws supplied by CENTA.
These are coated with microencapsulated adhesive INBUS PLUS IP which serves as a
screw locking medium.
IMPORTANT
To ensure optimum screw locking, after tightening the curing time for the
microencapsulated adhesive must be observed:
•Appr. 4-5 hours at room temperature (20°C)
•Higher temperatures will accelerate the curing time
(e.g. 15 minutes at 70°C created by a hot air blower)
After 24 hours, the adhesive is completely cured.

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 18 / 51
6.2 Mounting the coupling according to the supplied type
¾Mount the side of the coupling which is depending on the type. The supplied
design is part of the couplings designation.
Example:
¾Mount the coupling according to the design in following order. The supplied
design and the build-in parts have to be gathered from the.
¾Mounting the hub/flange hub (type 1 and 2), see chapter 6.3 .
¾Mounting the flange (type 3), see chapter 6.4 .
¾Positioning the rubber element, see chapter 6.5 .
¾Mounting the rubber element, see chapter 6.6; 6.7 and 6.8 .

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 19 / 51
6.3 Mounting the hub (type 1) and flange hub (type 2)
¾Mount the hub and flange hub according to the design (see installation
drawing).
¾Overview of possible hubs/flange hubs and chapter of the mounting, see
following table.
Possible
design Mounting the hub/flange hub with … see chapter
cylindrical drilling and feather key 6.3.1
conical drilling and feather key 6.3.2
toothing 6.3.3
CENTALOC clamping 6.3.4
CENTA-conical clamping 6.3.5
conical oil interference fit 6.3.6
Table 6-1 Overview of possible hub/flange hub design

Assembly and operating instructions
CENTAFLEX-A
CF-A-800-0…3
M008-00077-EN
Rev. 1
CENTA Antriebe Kirschey GmbH 20 / 51
6.3.1 Mounting the hub/flange hub with cylindrical drilling and feather key
Fig. 6-1 Mounting the hub/flange hub with cylindrical drilling and feather key
Item Info Designation Remark
2/6 Hub/Flange hub Shown is the hub
16 Threaded pin DIN914 See installation drawing
A Shaft Customer part
a Face of shaft
b Face of hub/flange hub
CAUTION
Material damage can occur as a result of:
Incorrect heating of the hubs/flange hubs
Heat the hubs/flange hubs steadily in a fan oven, on an electric hot
plate, either inductive or with a flame (ring burner).