KTR RIGIFLEX-HP Operating/Mounting Instructions

KTR RIGIFLEX-HP is a torsionally stiff steel lamina coupling for high-speed drive trains. It compensates for shaft misalignment caused by thermal expansion and other factors. The coupling is designed for use in a variety of applications, including industrial machinery, power generation, and material handling. RIGIFLEX-HP is available in two types: Type C and Type L, with different dimensions and torque ratings. Consult the RIGIFLEX-HP catalogue for detailed product information and selection instructions.

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RIGIFLEX&reg;-HP
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47510 EN
1 of 14
2
RIGIFLEX&reg;-HP
Torsionally stiff steel lamina coupling types
C and L
Type C
Type L
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47510 EN
2 of 14
2
RIGIFLEX&reg;-HP is a torsionally stiff flexible steel lamina coupling for high-speed drive trains. It
is able to compensate for shaft misalignment, for example caused by thermal expansion, etc.
Table of contents
1
Technical data
3
2
Advice
5
2.1
2.2
2.3
2.4
2.5
2.6
5
5
5
5
6
6
3
4
Coupling selection
General advice
Safety and advice symbols
General hazard warnings
General hazard warnings
Reference to EC Machinery Directive 2006/42/EC
Storage, transport and packaging
6
3.1
3.2
6
6
Storage
Transport and packaging
Assembly
6
4.1
4.2
4.3
4.4
4.5
4.6
7
8
8
9
9
10
Components of the coupling
Advice for finish bore
Assembly of coupling hubs
Assembly of the spacer - type C
Assembly of the spacer - type L
Displacements - alignment of the coupling
5
Start-up
11
6
Breakdowns, causes and elimination
12
7
Disposal
13
8
Maintenance and service
14
9
Spares inventory, customer service addresses
14
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
KTR-N
Sheet:
Edition:
RIGIFLEX&reg;-HP
Operating/Assembly instructions
1
47510 EN
3 of 14
2
Technical data
Type C
Illustration 1: RIGIFLEX&reg;-HP, type C
Table 1: Dimensions – type C
158
168
188
208
228
248
278
318
358
388
Dimensions
[mm]
D
DA
DZ
DR
E1
119
139
147
168
178
196
225
252
295
330
220
255
265
298
315
335
380
445
500
545
195
220
235
245
270
300
335
370
415
464
135
155
165
186
199
217
248
280
326
362
17
23
23
23
33
33
33
48
48
48
E
Emin.
CG1/CG2
According to customer
specification
Size
Max.
finish
bore
d1; d2
85
100
105
120
125
140
160
180
210
235
335
395
375
350
425
395
355
495
435
400
46
55
55
57
65
67
70
88
93
97
1)
l1/l2
l3/l4
l5/l6
85
100
105
120
125
140
160
180
210
235
189
229
229
229
265
265
265
348
348
348
130
155
155
155
175
175
175
225
225
225
1) with E=457.2 mm and cylindrical maximum finish bore
Table 2: Torque and speed - type C
Torque [Nm]
Size
TKN
20000
30000
38000
50000
59000
72000
115000
180000
253000
330000
158
168
188
208
228
248
278
318
358
388
Please observe protection
note ISO 16016.
Drawn:
Verified:
TK max.
26000
39000
49400
65000
76700
93600
149500
234000
328900
429000
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
Max. speed [rpm]
17300
14900
14400
12800
12100
11400
10000
8500
7600
7000
KTR-N dated 2013-03-06
KTR-N
Sheet:
Edition:
RIGIFLEX&reg;-HP
Operating/Assembly instructions
1
47510 EN
4 of 14
2
Technical data
Type L
Illustration 2: RIGIFLEX&reg;-HP, type L
Table 3: Dimensions – type L
158
168
188
208
228
248
278
318
358
388
Dimensions
[mm]
D
DA
DZ
DR
E1
210
230
250
280
310
340
380
445
490
535
310
320
335
362
390
420
455
550
600
650
220
255
265
298
315
334
380
445
500
545
135
155
165
186
199
217
248
280
326
362
17
23
23
23
33
33
33
48
48
48
E
Emin.
CG1/CG2
According to customer
specification
Size
Max.
finish
bore
d1; d2
150
165
180
200
220
240
270
315
350
380
265
340
340
340
390
390
390
510
510
510
140
148
156
165
179
185
202
246
263
277
1)
l1/l2
l3/l4
l5/l6
150
165
180
200
220
235
270
315
350
380
163.5
168.5
183.5
203.5
223.5
238.5
273.5
318.5
353.5
383.5
37.5
48.0
48.0
48.0
54.5
54.5
54.5
71.5
71.5
71.5
1) with E=457.2 mm and cylindrical maximum finish bore
Table 4: Torque and speed - type L
Torque [Nm]
Size
TKN
20000
30000
38000
50000
59000
72000
115000
180000
253000
330000
158
168
188
208
228
248
278
318
358
388
Please observe protection
note ISO 16016.
Drawn:
Verified:
TK max.
26000
39000
49400
65000
76700
93600
149500
234000
328900
429000
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
Max. speed [rpm]
13800
12300
11400
10500
9700
9000
8300
6900
6300
5800
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
2
KTR-N
Sheet:
Edition:
47510 EN
5 of 14
2
Advice
2.1 Coupling selection
!
For a long-lasting and failure-free operation of the coupling it must be selected according to
&reg;
the selection instructions for the particular application (see RIGIFLEX -HP catalogue).
If the operating conditions (performance, speed, modifications on engine and machine)
change, the coupling selection must be reviewed.
Please note that the technical data regarding torque refer to the lamina set only. The transmittable torque of the shaft-hub-connection must be reviewed by the customer and is subject to his responsibility.
For drives subject to torsional vibrations (drives with cyclic stress due to torsional vibrations) it is necessary to
perform a torsional vibration calculation to ensure a reliable selection. Typical drives subject to torsional vibrations
are e. g. drives with diesel engines, piston pumps, piston compressors etc. If requested, KTR will perform the
coupling selection and the torsional vibration calculation.
2.2 General advice
Please read through these assembly instructions carefully before you start up the coupling.
Please pay special attention to the safety instructions!
The assembly instructions are part of your product. Please store them carefully and close to the coupling.
The copyright for these assembly instructions remains with KTR.
2.3 Safety and advice symbols
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.
2.4 General hazard warnings
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. Please 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 &quot;safety first&quot;.
 Please 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.
 Please secure the coupling against accidental contact. Please provide for the necessary protection devices
and covers.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
2
KTR-N
Sheet:
Edition:
47510 EN
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2
Advice
2.5 General hazard warnings
You may only assemble, operate and maintain the coupling if you
 have carefully read through the assembly instructions and understood them
 had technical training
 are authorized by your company
The coupling may only be used in accordance with the technical data (see chapter 1). Unauthorized modifications
on the coupling design are not admissible. We will not assume liability for any damage that may arise. In the interest of further development we reserve the right for technical modifications.
&reg;
The RIGIFLEX -HP described in here corresponds to the technical status at the time of printing of these assembly instructions.
2.6 Reference to EC Machinery Directive 2006/42/EC
The couplings supplied by KTR should be considered as components, not machines or partly completed machines according to EC Machinery Directive 2006/42/EC. Consequently KTR does not have to issue a declaration
of incorporation. For details about safe assembly, start-up and safe operation please refer to the present operating/assembly instructions considering the warnings.
3
Storage, transport and packaging
3.1 Storage
The couplings are supplied in preserved condition and can be stored at a dry and covered place for 6 - 9 months.
Humid storage rooms are not suitable.
Please make sure that condensation is not generated. The best relative air humidity is less
than 65 %.
!
3.2 Transport and packaging
In order to avoid any injuries and any kind of damage please always make use of proper
transport and lifting equipment.
!
The couplings are packed differently each depending on size, number and kind of transport. Unless otherwise
contractually agreed, packaging will follow the in-house packaging specifications of KTR.
4
Assembly
The coupling hubs are supplied fully assembled. Before assembly the coupling has to be inspected for completeness.
STOP
Driving components falling down may cause injury to persons or damage on the machine.
Secure the driving components with assembly or disassembly.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
47510 EN
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Assembly
4.1 Components of the coupling
Components of RIGIFLEX&reg;-HP type C
Component
1
2
3
4
Quantity
2
1
see table 5
see table 5
Description
Coupling hub C
Spacer C
Double hexagon bolt
Double hexagon nut
Illustration 3: RIGIFLEX&reg;-HP, type C
Table 5:
Size
Number of double hexagon
1)
1)
bolt /nut
Tightening torque TA [Nm]
158
168
188
208
228
248
278
318
358
388
18
24
30
30
24
25
30
25
30
34
115
115
115
115
290
290
290
560
560
560
1) Quantity for each coupling half
Components of RIGIFLEX&reg;-HP type L
Component
1
2
3
4
Quantity
2
1
see table 6
see table 6
Description
Coupling hub L
Spacer L
Double hexagon bolt
Double hexagon nut
Illustration 4: RIGIFLEX&reg;-HP, type L
Table 6:
Size
Number of double hexagon
1)
1)
bolt /nut
Tightening torque TA [Nm]
158
168
188
208
228
248
278
318
358
388
13
18
20
24
15
18
20
20
25
30
115
115
115
115
290
290
290
560
560
560
1) Quantity for each coupling half
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
47510 EN
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Assembly
4.2 Advice for finish bore
!
The customer bears the sole responsibility for all machining processes performed subsequently on unbored or pilot bored as well as finish machined coupling components and
spare parts. KTR does not assume any warranty claims resulting from insufficient remachining.
4.3 Assembly of coupling hubs

We recommend to inspect bores, shaft, keyway and feather key for dimensional accuracy
before assembly.
Heating the hubs lightly (approx. 80 &deg;C) allows for an easier mounting on the shafts.
Please pay attention to the ignition risk in potentially explosive atmospheres!
STOP
!
Touching the heated hubs causes burns.
Please wear safety gloves.
With the assembly please make sure that the distance dimension E (see table 1) is observed
so that the coupling components are not in contact with each other during the operation.
Disregarding this advice may cause damage to the coupling.
For axial alignment of the coupling the distance dimension E (see table 1 and 3) is decisive. In order to adjust the
right dimension E you should proceed as follows:
 Mount the coupling hubs (component 1) onto the shaft of driving and driven side.
 The internal sides of the coupling hubs must be flush with the front sides of the shafts (type C see illustration 5
resp. type L see illustration 6).
 Shift the power packs in axial direction until the distance dimension E is achieved.
 If the power packs are already firmly assembled, shifting the coupling hubs axially on the shafts allows for
adjusting the distance dimension E.
Illustration 5: Assembly of coupling hubs C
Please observe protection
note ISO 16016.
Drawn:
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Illustration 6: assembly of the coupling hubs L
2016-10-27 Shg/ Wig
2016-11-09 Shg
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Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
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KTR-N
Sheet:
Edition:
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Assembly
4.4 Assembly of the spacer - type C
 The coupling hubs (component 1) have to be aligned such that the
screws of the lamina sets line up (see illustration 5).
 Clean and degrease the centerings and contact surfaces on the
spacer (component 2) and coupling hubs.
!
The transportation screws and spacer sleeves
have to be removed for further assembly and
operation (see illustration 7).
 Insert the spacer between the coupling hubs.
 Hand-screw the spacer on the coupling hubs by means of the
double hexagon screws and double hexagon nuts.
 Tighten the double nuts at the tightening torque (see table 5) specified while protecting the double hexagon screws from rotating.
Illustration 7: Disassembly of transport lock

For each coupling only screws with the same weight (tared) may be used.
Having started up the coupling, the tightening torque of the screws has to be inspected at
regular maintenance intervals.
!
4.5 Assembly of the spacer - type L
 The coupling hubs (component 1) have to be aligned such that the
holes of the coupling hubs line up (see illustration 6).
 Clean and degrease the centerings and contact surfaces on the
spacer (component 2) and coupling hubs.
!
The transportation screws and spacer sleeves
have to be removed for further assembly and
operation (see illustration 8).
 Insert the spacer between the coupling hubs.
 Hand-screw the spacer on the coupling hubs by means of the
double hexagon screws and double hexagon nuts.
 Tighten the double hexagon nuts at the tightening torque (see
table 6) specified while protecting the double hexagon screws from
rotating.

!
Illustration 8: Disassembly of transport lock
For each coupling only screws with the same weight (tared) may be used.
Having started up the coupling, the tightening torque of the screws has to be inspected at
regular maintenance intervals.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
4
KTR-N
Sheet:
Edition:
47510 EN
10 of 14
2
Assembly
4.6 Displacements - alignment of the coupling
The displacement figures specified in table 7 provide for sufficient safety to compensate for external influences
like, for example, thermal expansion or foundation settling.
!
In order to ensure a long service life of the coupling, the shaft ends have to be accurately
aligned.
Please absolutely observe the displacement figures specified (see table 7).
If the figures are exceeded, the coupling will be damaged.
The more accurate the alignment of the coupling, the longer is its service life.
Please note:
 The displacement figures specified in table 7 are maximum figures which must not arise in parallel. If radial,
axial and angular displacement arises at the same time, these values must be reduced (see illustration 10).
 Please inspect with a dial gauge, ruler or feeler gauge whether the permissible displacement figures specified
in table 7 can be observed.
Angular displacements
Radial displacements
Illustration 9: Displacements (example: type C)
Axial displacements
Examples of the displacement combinations specified in illustration 10:
Illustration 10: Combinations of displacement
Example 1:
Kr = 10%
Kw = 80%
Ka = 10%
Example 2:
Kr = 30%
Kw = 30%
Ka = 40%
Ktotal = Ka + Kr + Kw  100 %
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
KTR-N
Sheet:
Edition:
RIGIFLEX&reg;-HP
Operating/Assembly instructions
4
47510 EN
11 of 14
2
Assembly
4.6 Displacements - alignment of the coupling
Table 7: Displacement figures
Angular displace1)
ment
Kw [&deg;]
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
Size
158
168
188
208
228
248
278
318
358
388
Radial displacement
Axial displacement
Ka [mm]
2)
DKr [mm]
Type C
Type L
2.30
2.32
2.37
2.50
2.44
2.58
2.75
2.70
2.96
3.18
1.56
1.45
1.45
1.45
1.34
1.34
1.34
1.13
1.13
1.13
&plusmn;3.0
&plusmn;3.0
&plusmn;3.3
&plusmn;3.8
&plusmn;4.0
&plusmn;4.2
&plusmn;4.5
&plusmn;5.2
&plusmn;6.0
&plusmn;6.5
1) each lamina set
2) with E=457.2 mm and cylindrical maximum finish bore
5
Start-up
Before start-up of the coupling, please inspect the tightening of the setscrews in the hubs, the alignment and the
distance dimension E and adjust, if necessary, and also inspect all screw connections for the tightening torques
specified, dependent on the type of coupling.
Finally the coupling protection against accidental contact must be fitted.
The cover must be electrically conductive and included in the equipotential bonding. Bellhousings (magnesium
share below 7.5 %) made of aluminium and damping rings (NBR) can be used as connecting element between
pump and electric motor. The cover may only be taken off with standstill of the unit.
During operation of the coupling, please pay attention to
 different operating noise
 vibrations occurring.
The minimum distance „Sr“ between the protective device and the rotating parts must at least correspond to the
figures specified below.
If the protective device is used as cover, regular openings can be arranged from the point of view explosion protection that must not exceed the following dimensions:
Openings
Circular - max. diameter
Rectangular - max. lateral length
Straight or curved slot - max. lateral
length/height
!
Top side
4
4
Cover [mm]
Lateral components
8
8
Distance „Sr“
 10
 10
not permissible
8
 20
If you note any irregularities with the coupling during operation, the drive unit must be
switched off immediately. The cause of the breakdown must be specified by means of the
table „Breakdowns“ and, if possible, be eliminated according to the proposals. The potential
breakdowns mentioned can be hints only. To find out the cause all operating factors and
machine components must be considered.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
6
KTR-N
Sheet:
Edition:
47510 EN
12 of 14
2
Breakdowns, causes and elimination
&reg;
The below-mentioned failures can result in a use of the RIGIFLEX -HP coupling other than intended. In addition
to the specifications given in these operating and assembly instructions please make sure to avoid such failures.
The errors listed can only be clues to search for the failures. When searching for the failure the adjacent components must generally be considered.
General failures with use other than intended:
 Important data for the coupling selection were not forwarded.
 The calculation of the shaft-hub-connection was not considered.
 Coupling components with damage occurred during transport are assembled.
 If the heated hubs are assembled, the permissible temperature is exceeded.
 The clearance of the components to be assembled is not coordinated with one another.
 Tightening torques have been fallen below/exceeded.
 Components are mixed up by mistake/assembled incorrectly.
 A wrong or no lamina set is inserted in the coupling.
 No original KTR components (purchased parts) are used.
 Maintenance intervals are not observed.
Breakdowns
Different operating
noise and/or vibrations occuring
Causes
Hazard notes for hazardous locations
Misalignment
none
Cap screws working
loose, low micro
friction under the
screw head and on
the steel lamina set
Danger of ignition due
to hot surfaces
Screws for axial
fastening of hubs
working loose
none
Drawn:
Verified:
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2016-11-09 Shg
Please observe protection
note ISO 16016.
Elimination
1) Set the unit out of operation
2) Eliminate the reason for the misalignment (e. g. loose foundation bolts,
breaking of the engine mount, heat expansion of unit components, modification of the installation dimension E of
the coupling)
3) For inspection of wear see item inspection
1) Set the unit out of operation
2) Inspect coupling components and replace coupling components that are
damaged
3) Tighten the cap screws until the permissible tightening torque is reached
4) Inspect alignment, adjust if necessary
1) Set the unit out of operation
2) Inspect alignment of coupling
3) Tighten the screws to fasten the hubs
and secure against working loose
4) For inspection of wear see item inspection
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
6
47510 EN
13 of 14
2
Breakdowns, causes and elimination
Breakdowns
Breaking of steel
lamina set
Cracks in / fracture
of the steel lamina
set / locking screws
7
KTR-N
Sheet:
Edition:
Causes
Hazard notes for hazardous locations
Breaking of the steel
lamina set due to
high impact energy/overload
Ignition risk due to
sparking
Operating parameters do not meet
with the performance of the coupling
Ignition risk due to
sparking
Operating error of
the unit
Ignition risk due to
sparking
Vibrations of drive
Ignition risk due to
sparking
Elimination
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the steel lamina sets
3) Inspect coupling components and replace coupling components that are
damaged
4) Insert spacer, mount coupling components
5) Find out the reason for overload
1) Set the unit out of operation
2) Review the operating parameters and
select a bigger coupling (consider
mounting space)
3) Assemble new coupling size
4) Inspect alignment
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the spacer
3) Inspect coupling components and replace coupling components that are
damaged
4) Insert spacer, mount coupling components
5) Instruct and train the service staff
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the spacer
3) Inspect coupling components and replace coupling components that are
damaged
4) Insert spacer, mount coupling components
5) Inspect alignment, adjust if necessary
6) Find out the reason for vibrations
Disposal
In respect of environmental protection we would ask you to dispose of the packaging or products on termination of
their service life in accordance with the legal regulations and standards that apply, respectively.
All coupling components consist of metal. Any metal components have to be cleaned and disposed of by scrap
metal.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
RIGIFLEX&reg;-HP
Operating/Assembly instructions
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KTR-N
Sheet:
Edition:
47510 EN
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2
Maintenance and service
&reg;
RIGIFLEX -HP is a low-maintenance coupling. We recommend to perform a visual inspection on the coupling at
least once a year. Please pay special attention to the condition of the lamina sets as well as the alignment and
screw connection of the coupling.
 Since the flexible machine bearings of the driving and driven side settle during the course of load, please inspect the alignment of the coupling and re-align the coupling, if necessary.
 If some individual laminas are broken, the lamina sets of the coupling have to be replaced. The coupling parts
have to be inspected for damages.
 The screw connections have to be inspected visually.
After start-up of the coupling the tightening torques of the screws of the lamina sets have to
be inspected during usual maintenance intervals.
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9
Spares inventory, customer service addresses
A basic requirement to ensure the readiness for use of the coupling is a stock of the most important spare parts
on site.
Contact addresses of the KTR partners for spare parts and orders can be obtained from the KTR homepage at
www.ktr.com.

KTR does not assume any liability or warranty for the use of spare parts and accessories
which are not provided by KTR and for the damages which may incur as a result.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2016-10-27 Shg/ Wig
2016-11-09 Shg
Replacing:
Replaced by:
KTR-N dated 2013-03-06
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Key features

Torsionally stiff
Steel lamina coupling
High-speed drive trains
Shaft misalignment compensation
Type C & L variations

Frequently asked questions

The KTR RIGIFLEX-HP coupling is designed to connect two shafts together, while allowing for some degree of misalignment between the shafts. This is important in applications where the shafts may move slightly due to factors such as thermal expansion or vibration.

The KTR RIGIFLEX-HP coupling can compensate for radial, axial, and angular misalignment between the shafts.

The KTR RIGIFLEX-HP coupling is available in two types: Type C and Type L. The main difference between the two types is the dimensions and torque ratings.