KTR RIGIFLEX-N Operating/Mounting Instructions
KTR RIGIFLEX-N is a torsionally stiff flexible steel laminae coupling designed to compensate for shaft misalignment caused by thermal expansion or other factors. It's ideal for replacing couplings without disassembling the driving or driven machine. Its robust design ensures durability and reliable operation in demanding environments.
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RIGIFLEX®-N
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
1 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
RIGIFLEX®-N
Torsionally stiff steel lamina coupling
according to directive 2014/34/EU and UK directive SI 2016 No. 1107
Type A-H
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
1 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
RIGIFLEX®-N
Torsionally stiff steel lamina coupling
according to directive 2014/34/EU and UK directive SI 2016 No. 1107
Type A-H
RIGIFLEX®-N
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
2 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
RIGIFLEX®-N is a torsionally stiff flexible steel laminae coupling. It is able to compensate for shaft
misalignment, for example caused by thermal expansion, etc.
Type A-H allows to replace a coupling without having to disassemble the driving or driven machine,
respectively.
1 Technical data 3
2 Advice 4
2.1 General advice 4
2.2 Safety and advice symbols 4
2.3 General hazard warnings 4
2.4 Intended use 5
2.5 Coupling selection 5
2.6 Reference to EC Machinery Directive 2006/42/EC 5
3 Storage, transport and packaging 5
3.1 Storage 5
3.2 Transport and packaging 6
4 Assembly 6
4.1 Components of the couplings 6
4.2 Advice for finish bore 7
4.3 Assembly of the coupling 7
4.4 Disassembly of the coupling 8
4.5 Displacements - alignment of the coupling 9
5 Start-up 10
6 Breakdowns, causes and elimination 11
7 Disposal 12
8 Maintenance and service 13
9 Spares inventory, customer service addresses 13
10 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres 14
10.1 Intended use in potentially explosive atmospheres 14
10.2 Inspection intervals for couplings in potentially explosive atmospheres 15
10.3 marking of coupling for potentially explosive atmospheres 16
10.4 EU Declaration of conformity 18
10.5 UK Declaration of conformity 19
Table of contents
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
2 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
RIGIFLEX®-N is a torsionally stiff flexible steel laminae coupling. It is able to compensate for shaft
misalignment, for example caused by thermal expansion, etc.
Type A-H allows to replace a coupling without having to disassemble the driving or driven machine,
respectively.
1 Technical data 3
2 Advice 4
2.1 General advice 4
2.2 Safety and advice symbols 4
2.3 General hazard warnings 4
2.4 Intended use 5
2.5 Coupling selection 5
2.6 Reference to EC Machinery Directive 2006/42/EC 5
3 Storage, transport and packaging 5
3.1 Storage 5
3.2 Transport and packaging 6
4 Assembly 6
4.1 Components of the couplings 6
4.2 Advice for finish bore 7
4.3 Assembly of the coupling 7
4.4 Disassembly of the coupling 8
4.5 Displacements - alignment of the coupling 9
5 Start-up 10
6 Breakdowns, causes and elimination 11
7 Disposal 12
8 Maintenance and service 13
9 Spares inventory, customer service addresses 13
10 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres 14
10.1 Intended use in potentially explosive atmospheres 14
10.2 Inspection intervals for couplings in potentially explosive atmospheres 15
10.3 marking of coupling for potentially explosive atmospheres 16
10.4 EU Declaration of conformity 18
10.5 UK Declaration of conformity 19
Table of contents
RIGIFLEX®-N
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
3 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
Illustration 1: RIGIFLEX®-N, type A-H
Table 1: Dimensions
Size
Max. finish bore
[mm]
D
Dimensions [mm]
General Clamping screws
DIN EN ISO 4762
DH L L1, L2 E DBSE 1) MxLM TA [Nm]
46 42 69
L = L1 + L2
+ DBSE 45 5.0 100 140 180 250 M5x25 8.1
56 55 85 55 4.8 100 140 180 250 M6x30 14
66 65 105 65 8.0 100 140 180 250 M8x35 34
76 75 124 75 8.0 - 140 180 250 M10x40 67
86 85 145 85 10.0 - 140 180 250 M12x55 115
106 105 168 105 12.0 - - 180 250 M12x55 115
1) Other shaft distance dimensions (DBSE) available on request
Table 2: Torque and speed
Size 46 56 66 76 86 106
Torque
[Nm]
TKN 90 255 450 975 1500 2400
TK max 180 510 900 1950 3000 4800
TKW 45 127.5 225 487 750 1200
Max. speed n [rpm] 5000 5000 5000 5000 4500 4000
Please note that the standard type of coupling has been designed for horizontal assembly
only. With vertical or slanting coupling assembly vertical support may be necessary. Please
consult with KTR for any other applications.!
In case if a dimensional drawing was prepared for the coupling, the dimensions specified
have to be primarily observed.
The operator of the machine should be provided with the dimensional drawing.
RIGIFLEX®-N couplings with attachments that can generate heat, sparks and static charging
(e. g. combinations with brake drums, brake disks, overload systems such as torque
limiters, fan impellers etc.) are not permitted for the use in potentially explosive
atmospheres.
A separate analysis must be performed.
1 Technical data
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
3 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
Illustration 1: RIGIFLEX®-N, type A-H
Table 1: Dimensions
Size
Max. finish bore
[mm]
D
Dimensions [mm]
General Clamping screws
DIN EN ISO 4762
DH L L1, L2 E DBSE 1) MxLM TA [Nm]
46 42 69
L = L1 + L2
+ DBSE 45 5.0 100 140 180 250 M5x25 8.1
56 55 85 55 4.8 100 140 180 250 M6x30 14
66 65 105 65 8.0 100 140 180 250 M8x35 34
76 75 124 75 8.0 - 140 180 250 M10x40 67
86 85 145 85 10.0 - 140 180 250 M12x55 115
106 105 168 105 12.0 - - 180 250 M12x55 115
1) Other shaft distance dimensions (DBSE) available on request
Table 2: Torque and speed
Size 46 56 66 76 86 106
Torque
[Nm]
TKN 90 255 450 975 1500 2400
TK max 180 510 900 1950 3000 4800
TKW 45 127.5 225 487 750 1200
Max. speed n [rpm] 5000 5000 5000 5000 4500 4000
Please note that the standard type of coupling has been designed for horizontal assembly
only. With vertical or slanting coupling assembly vertical support may be necessary. Please
consult with KTR for any other applications.!
In case if a dimensional drawing was prepared for the coupling, the dimensions specified
have to be primarily observed.
The operator of the machine should be provided with the dimensional drawing.
RIGIFLEX®-N couplings with attachments that can generate heat, sparks and static charging
(e. g. combinations with brake drums, brake disks, overload systems such as torque
limiters, fan impellers etc.) are not permitted for the use in potentially explosive
atmospheres.
A separate analysis must be performed.
1 Technical data
RIGIFLEX®-N
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
4 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
Read through these operating/assembly instructions carefully before you start up the coupling.
Pay special attention to the safety instructions!
The RIGIFLEX®-N coupling is suitable and approved for the use in potentially explosive
atmospheres. When using the coupling in potentially explosive atmospheres, observe the special
advice and instructions regarding safety in enclosure A.
The operating/assembly instructions are part of your product. Please store them carefully and close to the
coupling. The copyright for these operating/assembly instructions remains with KTR.
Warning of potentially explosive
atmospheres
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death caused by explosion.STOP
Warning of personal injury
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death.!
Warning of product damages This symbol indicates notes which may contribute to
preventing material or machine damage.
General advice This symbol indicates notes which may contribute to
preventing adverse results or conditions.
Warning of hot surfaces
This symbol indicates notes which may contribute to
preventing burns with hot surfaces resulting in light to
serious bodily injuries.STOP
With assembly, operation and maintenance of the coupling it has to be made sure that the
entire drive train is secured against accidental switch-on. You may be seriously hurt by
rotating parts. Make absolutely sure to read through and observe the following safety
indications.
• All operations on and with the coupling have to be performed taking into account "safety first".
• Make sure to switch off the power pack before you perform your work on the coupling.
• Secure the power pack against accidental switch-on, e. g. by providing warning signs at the place of switch-on
or removing the fuse for current supply.
• Do not reach into the operating area of the coupling as long as it is in operation.
• Secure the coupling against accidental contact. Provide for the necessary protection devices and covers.
2 Advice
2.1 General advice
2.2 Safety and advice symbols
2.3 General hazard warnings
Operating/Assembly instructions
Type A-H
KTR-N
Sheet:
Edition:
47411 EN
4 of 19
2
Please observe protection
note ISO 16016.
Drawn: 2022-07-06 Pz/Wb Replacing: KTR-N dated 2019-06-24
Verified: 2022-08-09 Pz Replaced by:
Read through these operating/assembly instructions carefully before you start up the coupling.
Pay special attention to the safety instructions!
The RIGIFLEX®-N coupling is suitable and approved for the use in potentially explosive
atmospheres. When using the coupling in potentially explosive atmospheres, observe the special
advice and instructions regarding safety in enclosure A.
The operating/assembly instructions are part of your product. Please store them carefully and close to the
coupling. The copyright for these operating/assembly instructions remains with KTR.
Warning of potentially explosive
atmospheres
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death caused by explosion.STOP
Warning of personal injury
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death.!
Warning of product damages This symbol indicates notes which may contribute to
preventing material or machine damage.
General advice This symbol indicates notes which may contribute to
preventing adverse results or conditions.
Warning of hot surfaces
This symbol indicates notes which may contribute to
preventing burns with hot surfaces resulting in light to
serious bodily injuries.STOP
With assembly, operation and maintenance of the coupling it has to be made sure that the
entire drive train is secured against accidental switch-on. You may be seriously hurt by
rotating parts. Make absolutely sure to read through and observe the following safety
indications.
• All operations on and with the coupling have to be performed taking into account "safety first".
• Make sure to switch off the power pack before you perform your work on the coupling.
• Secure the power pack against accidental switch-on, e. g. by providing warning signs at the place of switch-on
or removing the fuse for current supply.
• Do not reach into the operating area of the coupling as long as it is in operation.
• Secure the coupling against accidental contact. Provide for the necessary protection devices and covers.
2 Advice
2.1 General advice
2.2 Safety and advice symbols
2.3 General hazard warnings
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8
9
10
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12
13
14
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Key Features
- Torsionally stiff coupling
- Shaft misalignment compensation
- Easy replacement
- Suitable for potentially explosive atmospheres
- Low maintenance
Related manuals
Frequently Answers and Questions
What types of misalignments can RIGIFLEX-N compensate for?
The RIGIFLEX-N is designed to handle radial, axial, and angular misalignments. This means it can accommodate variations in shaft position and angle, which are often caused by thermal expansion or foundation settling.
How do I assemble the RIGIFLEX-N coupling?
The assembly process involves aligning the shafts, placing the basic body of coupling on the shafts, and then securing the half shells with clamping screws. Make sure to observe the distance dimension DBSE and the torque values specified in the manual.
How often should I inspect the RIGIFLEX-N coupling?
We recommend inspecting the coupling visually at least once a year. Pay attention to the condition of the laminae sets, alignment, and screw connection of the coupling. If used in potentially explosive atmospheres, refer to the specific inspection intervals outlined in the manual.
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