KTR ROTEX ZR Manual

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
1 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
ROTEX®
Torsionally flexible jaw couplings type ZR
and their combinations

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
2 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
ROTEX®is a torsionally flexible jaw coupling. It is able to compensate for shaft misalignment, for
example caused by manufacturing inaccuracies, thermal expansion, etc.
The double-cardanic design of the coupling allows to compensate for higher radial displacements.
Type ZR is not permissible for crane drives and hoist drives.
For vertical assembly of type ZR it is necessary to use a pulling washer in the cam ground of the hub
at the bottom.
1Technical data 3
2Advice 5
2.1 General advice 5
2.2 Safety and advice symbols 5
2.3 General hazard warnings 5
2.4 Intended use 5
2.5 Coupling selection 6
2.6 Reference to EC Machinery Directive 2006/42/EC 6
3Storage, transport and packaging 6
3.1 Storage 6
3.2 Transport and packaging 6
4Assembly 7
4.1 Components of the coupling 7
4.2 Advice for finish bore 8
4.3 Assembly of the coupling (general) 9
4.4 Assembly of the hubs 9
4.5 Assembly of DH clamping hubs 10
4.6 Assembly of the ZR spacer 10
4.7 Displacements - alignment of the couplings 11
4.8 Critical bending speed 12
5Start-up 13
6Breakdowns, causes and elimination 13
7Disposal 15
8Maintenance and service 15
9Spares inventory, customer service addresses 15
Table of contents

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
3 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Type ZR
Illustration 1: Type ZR (with ROTEX®GS spider)
Table 1: Dimensions and technical data
Size
Spider 1) (component 2)
Rated torque [Nm]
Dimensions [mm]
Intermediate pipe
Torsional stiffness
92 ShA
98 ShA
64 ShD
Max. finish
bore d 2)
DH
D
l1; l2
E
s
b
ØRA
[mm]
C 3)
[Nm2/rad]
19
10
17
21
25
40
40
25
16
2.0
12
20x3
954.9
24
35
60
75
35
55
55
30
18
2.0
14
30x4
4522
28
95
160
200
40
65
65
35
20
2.5
15
35x4
7611
38
190
325
405
48
80
66
45
24
3.0
18
40x4
11870
42
265
450
560
55
95
75
50
26
3.0
20
45x4
17487
48
310
525
655
62
105
85
56
28
3.5
21
50x4
24648
55
410
685
825
74
120
98
65
30
4.0
22
55x4
33544
65
-
940
1175
80
135
115
75
35
4.5
26
65x5
68329
75
-
1920
2400
95
160
135
85
40
5.0
30
75x5
108000
Size
Clamping hub (part 2.0)
LZR
Shaft distance
dimension
M1
TA
[Nm]
TR
[Nm]
Locking
screw G1
Pin hole
Ødp
Number of
screws
Hub material
min. LR1
19
M6
14
58
M6
4.0
1
St
LZR = LR1 + 2 l1
110
24
M6
14
83
M8
5.5
1
St
128
28
M8
35
185
M10
7.0
1
St
145
38
M8
25
144
M12
8.5
1
Al-D
180
35
203
St
42
M10
49
258
M12
8.5
1
Al-D
198
69
377
St
48
M12
86
431
M16
12
1
Al-D
217
120
618
St
55
M12
120
1418
M16
12
2
St
242
65
M12
120
1620
M16
12
2
St
281
75
M16
295
3500
M16
12
2
St
318
1) Maximum torque of the coupling TK max = rated torque of the coupling TK rated x 2
2) Bores H7 with keyway to DIN 6885 sheet 1 [JS9] and thread for setscrew
3) Torsion spring stiffness with 1 m length of the intermediate pipe
= standard
1 Technical data

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
4 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Type ZR with clamping hubs DH
Illustration 2: Type ZR with clamping hubs DH (for double-cardanic connection 7.5 or 7.6 with ROTEX®GS spider)
Table 2: Dimensions and technical data
Size
Spider 1) (component 2)
Rated torque [Nm]
Dimensions [mm]
92 ShA
98 ShA
64 ShD
Max. finish
bore d
DH
D
l1; l2
x1; x2
E
s
b
19
10
17
21
20
40
40
25
17.5
16
2.0
12
24
35
60
75
28
55
55
30
22.5
18
2.0
14
28
95
160
200
38
65
65
35
25.5
20
2.5
15
38
190
325
405
45
80
80
45
35.5
24
3.0
18
42
265
450
560
55
95
85
50
39.0
26
3.0
20
48
310
525
655
60
105
95
56
45.0
28
3.5
21
55
410
685
825
70
120
110
65
50.0
30
4.0
22
65
-
940
1175
80
135
115
75
60.0
35
4.5
26
75
-
1920
2400
90
160
135
85
67.5
40
5.0
30
Size
Clamping hub (part 7.5 / 7.6)
Intermediate pipe
Torsional stiffness
LZH
Shaft distance
dimension
M2
TA[Nm]
Number of
screws
Hub material
ØRA
[mm]
C 2)
[Nm2/rad]
min. LR2
19
M6
14
2
St
20x3
954.9
LZH = LR2 + 2 x1
97
24
M6
14
2
St
30x4
4522
111
28
M8
35
2
St
35x4
7611
129
38
M8
35
2
St
40x4
11870
157
42
M10
69
2
St
45x4
17487
174
48
M12
120
2
St
50x4
24648
190
55
M12
120
2
St
55x4
33544
220
65
M12
120
2
St
65x5
68329
250
75
M16
295
2
St
75x5
108000
285
1) Maximum torque of the coupling TK max = rated torque of the coupling TK rated x 2
2) Torsion spring stiffness with 1 m length of the intermediate pipe
1 Technical data

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
5 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Please read through these operating/assembly instructions carefully before you start up the coupling.
Please pay special attention to the safety instructions!
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.
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. 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 "safety first".
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.
You may only assemble, operate and maintain the coupling if you
have carefully read through the operating/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.
The ROTEX®described in here corresponds to the technical status at the time of printing of these
operating/assembly instructions.
2 Advice
2.1 General advice
2.2 Safety and advice symbols
2.3 General hazard warnings
2.4 Intended use

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
6 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
!
For a permanent and failure-free operation of the coupling it must be selected according to
the selection instructions (according to DIN 740 part 2) for the particular application (see
catalogue drive technology "ROTEX®").
If the operating conditions (performance, speed, modifications on engine and machine)
change, the coupling selection must be reviewed.
Please make sure that the technical data regarding torque refer to the spider 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.
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.
The coupling hubs are supplied in preserved condition and can be stored at a dry and roofed place for
6 - 9 months.
The features of the coupling spiders (elastomers) remain unchanged for up to 5 years with favourable storage
conditions.
!
The storage rooms must not include any ozone-generating devices like e. g. fluorescent
light sources, mercury-vapour lamps or electrical high-voltage appliances.
Humid storage rooms are not suitable.
Please make sure that condensation is not generated. The best relative air humidity is less
than 65 %.
!
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.
2 Advice
2.5 Coupling selection
2.6 Reference to EC Machinery Directive 2006/42/EC
3 Storage, transport and packaging
3.1 Storage
3.2 Transport and packaging

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
7 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
The coupling is supplied as an assembled/pre-assembled unit or in individual parts. Before assembly the coupling
has to be inspected for completeness.
Components of ROTEX®type ZR
Component
Quantity
Description
1
2
Hub
2
2
Spider
3
2
ZR clamping hub
4
1
ZR intermediate pipe
5
see table 1 and 2
Cap screws DIN EN ISO 4762
6
1)
Setscrews DIN EN ISO 4029
7
2
Setscrews with pins DIN EN ISO 4028
1) depending on hub (component 1)
Illustration 3: ROTEX®type ZR
Features of standard spiders
Spider hardness (Shore)
92 ShA-GS
98 ShA-GS
64 ShD-H-GS
64 ShD-GS
Size
19 - 55
19 - 75
19 - 38
42 - 75
Material
Polyurethane
Polyurethane
Hytrel
Polyurethane
Marking
(colour)
4 Assembly
4.1 Components of the coupling

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
8 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
STOP
The maximum permissible bore diameters d (see table 1
and 2 in chapter 1 - technical data) must not be exceeded.
If these figures are disregarded, the coupling may tear.
Rotating particles may cause danger to life.
Hub bores machined by the customer have to observe
concentricity or axial runout, respectively (see illustration
4).
Please make absolutely sure to observe the figures for
Ø dmax.
Carefully align the hubs when the finish bores are drilled.
Please provide for a setscrew according to
DIN EN ISO 4029 with a cup point or an end plate to fasten
the hubs axially.
Illustration 4: Concentricity and axial runout
!
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.
Table 3: Setscrews DIN EN ISO 4029
Size
19
24
28
38
42
48
55
65
75
Dimension G
M5
M5
M8
M8
M8
M8
M10
M10
M10
Dimension t
10
10
15
15
20
20
20
20
25
Tightening torque TA[Nm]
2
2
10
10
10
10
17
17
17
Table 4: Recommended fit pairs acc. to DIN 748/1
Bore [mm]
Shaft tolerance
Bore tolerance
above
up to
50
k6
H7
(KTR standard)
50
m6
If a feather keyway is intended to be used in the hub, it should correspond to the tolerance ISO JS9 (KTR
standard) with normal operating conditions or ISO P9 with difficult operating conditions (frequently alternating
torsional direction, shock loads, etc.). The keyway should preferably be located between the cams. With axial
fastening by setscrews the tapping should be located on the keyway except for Al-D which should be located
opposite the keyway.
The transmittable torque of the shaft-hub-connection must be reviewed by the customer and is subject to his
responsibility.
4 Assembly
4.2 Advice for finish bore

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
9 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:

We recommend to inspect bores, shaft, keyway and feather key for dimensional accuracy
before assembly.
Heating the hubs lightly (approx. 80 °C) allows for an easier mounting on the shaft.
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 and 2) is
observed to allow for axial clearance of the spider when in operation.
Disregarding this advice may cause damage to the coupling.
Mount the hubs on the shaft of driving and driven side (see illustration 5).
The internal sides of the hubs must be flush with the front sides of the shafts.
Shift the power packs in axial direction until the dimension LR1 is achieved (see illustration 1).
Fasten the hubs by tightening the setscrews DIN EN ISO 4029 with a cup point (tightening torque see table 3).
Illustration 5: Assembly of the hubs
4 Assembly
4.3 Assembly of the coupling (general)
4.4 Assembly of the hubs

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
10 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Remove the half shells from the hub body (see illustration 6).
Put the hub body with the cap screws installed on the shaft (see illustration 7).
Position the half shells towards the hub body (see illustration 8). Screw in the cap screws for several pitches.
The radial kerf of the DH clamping hubs must be flush with the front sides of the shafts.
Hand-tighten the components first until the hub bodies with the half shells fit closely to the shaft.
Secure the DH clamping hubs by tightening the clamping screws reciprocally. The screws have to be tightened
at the tightening torques TA specified in table 2 by means of a suitable torque wrench.
Shift the power packs in axial direction until the dimension LR2 is achieved (see illustration 2).
Illustration 6
Illustration 7
Illustration 8
Shift the ZR clamping hub onto the ZR intermediate
pipe (see illustration 9).
Insert the spiders in the cam section of the hubs or
clamping hubs DK, respectively.
Insert the pre-assembled unit between the hubs
(see illustration 10).
Align the ZR clamping hubs to the dimension E
resp. s required (see illustration 1 and 2 as well as
table 1 and 2).
Hand-tighten the ZR clamping hubs first. Tighten the
cap screws to the tightening torques TAspecified in
table 1 by means of a suitable torque key.
Drill the through holes Ødp (see illustration 1 and
table 1) in the ZR intermediate pipe for the
setscrews with pin DIN EN ISO 4028.
Screw in the setscrews with pin against a stop.
Illustration 9: Assembly of ZR clamping hubs on the ZR intermediate
pipe
Illustration 10: Assembly of the ZR spacer

With vertical assembly of ROTEX®type ZR a special washer of KTR has to be inserted
between the coupling hub at the bottom and the spider at the bottom.
4 Assembly
4.5 Assembly of DH clamping hubs
4.6 Assembly of the ZR spacer

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
11 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
The displacement figures specified in table 5 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 5). 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 5 are maximum figures which must not arise in parallel. If radial
and angular displacements arise at the same time, the permissible displacement values may only be used
proportionally (see illustration 12).
Please inspect with a dial gauge, ruler or feeler gauge whether the permissible displacement figures specified
in table 5 can be observed.
Angular displacements
Axial displacements
Illustration 11: Displacements
Radial displacements
Illustration 12:
Combinations of
displacement
Example:
ROTEX®24 ZR,
Speed 1500 rpm,
Coupling length LZR = 651 mm
Max. radial displacement Kr= 10 mm
Max. angular displacement Kw= 1°
with radial displacement of 4 mm = 40 % of the max.
radial displacement 10 mm,
results in a permissible angular displacement of 60 %
of the max. angular displacement 1° = 0.6°
Ktotal = Kw+ Kr100 %
4 Assembly
4.7 Displacements - alignment of the couplings

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
12 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Table 5: Displacement figures
Size
Max. axial
displacement
Ka[mm]
Max. angular displacement
Kw[degree] with n =
Max. radial displacement Kr[mm]
1500 rpm
3000 rpm
19
1.2
1.0
0.75
1) Calculate the distance from the center of one
spider to the center of the other spider LZK
(see illustration 1 and 2)
LZK = LZR - 2 x l1- E
2) Calculate the maximum radial displacement Kr
(see illustration 11)
Kr= tanKwx LZK
24
1.4
28
1.5
38
1.8
42
2.0
48
2.1
55
2.2
65
2.6
75
3.0
Please observe the critical
bending speed of the
coupling.
Illustration 13: Critical
bending speed of type ZR
4 Assembly
4.7 Displacements - alignment of the couplings
4.8 Critical bending speed

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
13 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Before start-up of the coupling, 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. It is required in accordance with
DIN EN ISO 12100 (Safety of Machinery) and directive 2014/14/EU and must protect against
access with the little finger
falling down of solid foreign objects.
The cover may provide for openings intended for necessary heat dissipation. These openings have to comply with
DIN EN ISO 13857.
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.
!
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 specified can be hints only. To find out the cause all operating factors and
machine components must be considered.
The below-mentioned failures can lead to a use of the ROTEX®coupling other than intended. In addition to the
specifications given in these operating and assembly instructions 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 disregarded.
Coupling components with damage occurred during transport are assembled.
If the heated hubs are assembled, the permissible temperature is exceeded.
The fit 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 spider is inserted in the coupling.
No original KTR components (purchased parts) are used.
Old/already worn out spiders or spiders stored for too long are used.
Maintenance intervals are not observed.
5 Start-up
6 Breakdowns, causes and elimination

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
14 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
Breakdowns
Causes
Elimination
Different operating noise
and/or vibrations
occuring
Misalignment
1) Set the unit out of operation
2) Eliminate the reason for the misalignment (e. g. loose
foundation bolts, breaking of the engine mount, thermal
expansion of unit components, modification of the installation
dimension E of the coupling)
3) For inspection of wear see item inspection
Wear of spider, short-term
torque transmission due to
metal contact
1) Set the unit out of operation
2) Disassemble the coupling and remove remainders of the spider
3) Inspect coupling components and replace coupling components
that have been damaged
4) Insert spider, assemble coupling components
5) Inspect alignment, adjust if necessary
Screws for axial fastening of
hubs working loose
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
Fracture of cams
Wear of spider, torque
transmission due to metal
contact
1) Set the unit out of operation
2) Replace complete coupling
3) Inspect alignment
Fracture of the cams due to
high impact energy/overload
1) Set the unit out of operation
2) Replace complete coupling
3) Inspect alignment
4) Find out the reason for overload
Operating parameters do
not meet with the
performance of the coupling
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
Operating error of the unit
1) Set the unit out of operation
2) Replace complete coupling
3) Inspect alignment
4) Instruct and train the service staff
Early wear of spider
Misalignment
1) Set the unit out of operation
2) Eliminate the reason for the misalignment (e. g. loose
foundation bolts, breaking of the engine mount, thermal
expansion of unit components, modification of the installation
dimension E of the coupling)
3) For inspection of wear see item inspection
e. g. contact with
aggressive liquids/oils,
ozone influence, too
high/low ambient
temperatures etc. causing
physical modification of the
spider
1) Set the unit out of operation
2) Disassemble the coupling and remove remainders of the spider
3) Inspect coupling components and replace coupling components
that have been damaged
4) Insert spider, assemble coupling components
5) Inspect alignment, adjust if necessary
6) Make sure that further physical modifications of the spider are
excluded
Ambient/contact
temperatures which are too
high for the spider, max.
permissible
e. g. with T-PUR®
T4 = - 50 °C/+ 120 °C
1) Set the unit out of operation
2) Disassemble the coupling and remove remainders of the spider
3) Inspect coupling components and replace coupling components
that have been damaged
4) Insert spider, assemble coupling components
5) Inspect alignment, adjust if necessary
6) Inspect and adjust ambient/contact temperature (possibly
corrective by using different spider materials)
Early wear of spider
(liquefaction of material
inside the spider cam)
Vibrations of drive
1) Set the unit out of operation
2) Disassemble the coupling and remove remainders of the spider
3) Inspect coupling components and replace coupling components
that have been damaged
4) Insert spider, assemble coupling components
5) Inspect alignment, adjust if necessary
6) Find out the reason for the vibrations (possibly corrective by
spider with lower or higher Shore hardness)
6 Breakdowns, causes and elimination

ROTEX®
Operating/Assembly instructions
Type ZR
KTR-N
Sheet:
Edition:
40215 EN
15 of 15
3
Please observe protection
note ISO 16016.
Drawn:
2018-08-28 Pz
Replacing:
KTR-N dated 2014-03-11
Verified:
2018-09-11 Pz
Replaced by:
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.
Metal
Any metal components have to be cleaned and disposed of by scrap metal.
Nylon materials
Nylon materials have to be collected and disposed of by a waste disposal company.
ROTEX®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 coupling spiders.
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.
The coupling components have to be inspected for damages.
The screw connections have to be inspected visually.
!
Having started up the coupling the tightening torques of the screws have to be inspected
during the usual inspection intervals.
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.
7 Disposal
8 Maintenance and service
9 Spares inventory, customer service addresses