RINGFEDER TNS S-St User manual

Installation and Operation Manual
Partner for Performance www.ringfeder.com
TNS S-St TNS S-LSt
EN
08.2019
Elastomer Jaw Couplings
RINGFEDER® TNS S-St, TNS S-LSt

- 2 -
Table of Contents
Chapter Page
1Safety Instructions............................................................................................................2
2Technical Description .......................................................................................................3
2.1 Intended Application........................................................................................................................3
3Coupling Marking..............................................................................................................4
3.1 Marking of Buffer Rings..................................................................................................................4
4Storage.............................................................................................................................4
5Construction .....................................................................................................................5
6Technical Data..................................................................................................................6
7Installation ........................................................................................................................8
7.1 To be observed prior to installation.............................................................................................8
7.2 Finish Bores .......................................................................................................................................8
7.3 Coupling Installation........................................................................................................................9
8Coupling Alignment ........................................................................................................11
8.1 Angular Misalignment ∆Kw...........................................................................................................12
8.2 Radial Misalignment ∆Kr...............................................................................................................12
8.3 Axial Misalignment.........................................................................................................................13
9Operation........................................................................................................................14
10 Maintenance ..................................................................................................................17
10.1 Wear Inspection on the Buffer Ring..........................................................................................17
10.2 Wear Inspection while the equipment is at standstill...........................................................18
10.3 Replacement of the buffer ring...................................................................................................19
11 Disposal .........................................................................................................................19
1 Safety Instructions
This installation and operation manual is an essential component of the coupling
delivery. Always keep this manual in a readily accessible place near the coupling.
Take care that all persons being charged with the installation, operation, maintenance and
repair of the coupling have read and understood this manual and that all instructions con-
tained therein are carefully observed in order to:
-avoid danger to life and limb of the user or third persons,
-ensure the operational safety of the coupling,
-preclude operation failures and environmental damages due to wrong handling and
misuse.
The relevant instructions and regulations regarding safety at work and environmental protec-
tion have to be observed while transporting, mounting and dismounting the coupling.
Make sure that appropriate transportation means and tools are at disposal.
The coupling shall be operated, mounted, maintained and repaired by authorized, trained and
instructed personnel only.
In the interest of further development, we reserve the right to carry out modifications serving
the technical progress.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 3 -
We do not assume any liability or warranty for any damages resulting from the use of
accessories and parts that are not originally manufactured by RINGFEDER POWER
TRANSMISSION.
2 Technical Description
The RINGFEDER® TNS S-St / TNS S-LSt coupling is a torsionally flexible, puncture proof
claw coupling. It compensates for angular, radial and axial shaft misalignments within
defined limits. The coupling transmits torque through elastic buffers loaded in shear. These
buffers come in Perbunan (Pb) or polyurethane (Vk), as standard in Vulkollan red (VkR),
and are connected to each other to form a buffer ring.
This elastic buffer ring dampens shocks and torsional vibrations and is resistant to oil.
Buffer rings made of Perbunan are electrically conductive.
The coupling is suitable for use in every direction of rotation and installation position.
2.1 Intended Application
•The coupling must only be operated in normal industrial atmospheres. Since aggressive
media may attack the coupling components, screws and elastic buffer rings, they repre-
sent a risk for the operational safety of the coupling. Consult RINGFEDER POWER
TRANSMISSION in such cases.
•In order to ensure trouble-free and reliable operation, the coupling has to be sized
according to the design specifications, e.g. according to DIN 740, part 2, (or acc. to
Product Paper & Tech Paper ”Elastomer Jaw Couplings“), with a service factor
appropriate for the service conditions.
•Except for the production of a finish bore with keyway (see 7.2 ‘Finish Bores’), no further
modifications are allowed to be carried out on the coupling.
•The coupling shall only be used and operated within the frame of the conditions as
defined in the performance or delivery contract.
•Any change in the operation conditions or service parameters requires the verification of
the coupling design.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 4 -
3 Coupling Marking
3.1 Marking of Buffer Rings
The buffer rings are marked on the face of one buffer element as follows:
- Coupling size and material abbreviation (Vk for Polyurethane or Pb for Perbunan)
- Year of construction
-Pb72 = buffer ring of Perbunan, 72 Shore(A) / black
-Pb82 = buffer ring of Perbunan, 82 Shore(A) / black
-VkB = buffer ring of Polyurethane, 83 Shore(A) / blue
-VkR = buffer ring of Polyurethane, 93 Shore(A) / red
-Vk60D = buffer ring of Polyurethane, 60 Shore(D) white/beige
4 Storage
On receipt of the goods, immediately check that all parts are on hand and are as ordered.
Eventual shipping damages and/or missing parts have to be reported in writing.
The coupling parts can be stored in the delivered state in a dry place under roof at normal
ambient temperatures for a time period of 6 months. Storage for a longer period requires the
application of a long-term preservation. (Please consult RINGFEDER POWER
TRANSMISSION in this respect.) The buffer rings must not be exposed to ozonic media,
direct sun light or intensive light sources with UV light. The air humidity should not exceed
65 %. If the parts are properly stored, the quality characteristics of the elastic buffer rings
remains almost unchanged for up to three years.
Size DA
[mm] h [mm] z
50 48 12 4
70 70 18 6
85 82 18 6
100 100 20 6
125 121 25 6
145 139 30 6
170 166 30 8
200 194 35 8
230 222 35 10
260 253 45 10
300 294 50 10
360 350 55 12
400 393 55 14
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 5 -
Fig. 1 Construction RINGFEDER® TNS S-St / TNS S-LStt
5 Construction
1 Coupling hub S-St, part 200
1L Long hub S-LSt, part 210
2 Elastic buffer ring, part 020
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 6 -
6 Technical Data
Table 1 Technical Data:
Size
S-St
S-LSt
nmax
[rpm]
TKnom
Pb72
[Nm]
TKmax
Pb72
[Nm]
TKnom
Pb82
[Nm]
TKmax
Pb82
[Nm]
TKnom
VkR
[Nm]
TKmax
VkR
[Nm]
TKnom
Vk60D
[Nm]
TKmax
Vk60D
[Nm]
TKnom
VkB
[Nm]
TKmax
VkB
[Nm]
50 15000 4 12 7,3 22 15 40 - - - -
70 11000 16 48 29 87 55 160 - - 32 96
85 9000 24 72 40 120 75 225 110 330 44 132
100 7250 40 120 70 210 130 390 195 585 76 228
125 6000 70 210 128 385 250 750 370 1110 140 420
145 5250 120 360 220 660 400 1200 600 1800 240 720
170 4500 180 540 340 1020 630 1900 950 2850 370 1110
200 3750 330 990 590 1770 1100 3300 1650 4950 640 1920
230 3250 500 1500 900 2700 1700 5150 2580 7740 980 2940
260 3000 800 2400 1400 4200 2650 7950 3980 11940 1530 4590
300 2500 1180 3540 2090 6270 3900 11700 5850 17550 2280 6840
360 2150 1940 5820 3450 10350 6500 19500 9700 29100 3760 11280
400 1900 2670 8010 4750 14250 8900 26700 13350 40050 5180 15540
-Pb72 = buffer ring of Perbunan - 72 Shore(A) / black
-Pb82 = buffer ring of Perbunan - 82 Shore(A) / black
-VkR = buffer ring of Polyurethane / red
-Vk60D = buffer ring of Polyurethane / white-beige
-VkB = buffer ring of Polyurethane / blue
Fig. 2 RINGFEDER® TNS S-St / TNS S-LStt
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 7 -
Size
S-St
S-LSt
d1
max
[mm]
D1
[mm]
D2
[mm]
L
[mm]
l1
[mm]
l2
[mm]
S
[mm]
h
[mm]
m
unbored
[kg]
50
50 L 25 50 41 42 75 96 30,0 40,5 23,5 34,0 1,5 12 0,8 1,0
70 38 70 55 100 38,5 31,5 2,5 18 1,8
85
85 L 40 85 60 110 184 43,5 80,5 35,0 72,0 2,5 18 2,6 4,3
100
100 L 42 105 65 125 187 49,5 80,5 37,5 68,5 3 20 4,2 5,8
125
125 L 55 126 85 145 253 56,5 110,5 44,0 98,0 3,5 25 7,5 12,3
145
145 L 65 145 95 160 259 61,0 110,5 47,5 97,0 4,0 30 10,6 16,1
170
170 L 85 170 120 190 321 75,0 140,5 60,5 126,0 5,0 30 18,0 29,6
200
200 L 95 200 135 245 328 99,0 140,0 79,5 124,0 6,0 35 31,0 39,6
230
230 L 105 230 150 270 390 110,0 170,0 88,5 151,0 7,0 35 43,5 59,0
260
260 L 125 260 180 285 400 112,5 170,0 88,5 146,0 7,0 45 63,0 85,3
300 140 300 200 330 131,5 107,5 7,0 50 91,5
360 150 360 210 417 172,0 140,0 8,0 55 146,2
400
400 L 160 400 225 400 440 163,5 183,5 137,0 157,0 7,5 55 160,4 173,0
The torques TKnom and TKmax. are valid for:
-Ambient temperatures of –30°C up to +30°C for Polyurethane (Vk),
-Ambient temperatures of -30°C up to + 60°C for Perbunan (Pb)
-Operation within the range of the specified alignment values.
For determining the size of the coupling according to DIN 740, part 2, (or to Product
Paper & Tech Paper ”Elastomer Jaw Couplings“) various factors have to be taken
into account:
-the temperature factor Sυin case of higher temperatures,
-the start-up factor Sz depending on the frequency of starts,
-the shock factor SA, SLdepending on the service conditions.
For circumferential speeds above 22 m/s, referred to the nominal size of the coupling, we
recommend balancing the steel parts of the coupling.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 8 -
7 Installation
7.1 To be observed prior to installation
• Danger of injuries!
• Disconnect the drive before carrying out any work on the coupling!
• Secure the drive against unintentional re-start and rotation!
• Incorrectly tightened bolts can cause serious personal injuries and
property damages!
• In compliance with accident prevention regulations, you are
obliged to protect all freely rotating parts by means of permanently
installed guards/covers against unintentional contact and falling
down objects.
• To avoid sparks, the covers for couplings used should be made of
stainless steel!
• As a minimum, the covers have to fulfil the requirements of protec-
tion type IP2X.
• The covers have to be designed to prevent dust from depositing on
the coupling.
• The cover must not contact the coupling or impair the proper
function of the coupling.
•Make sure that the speeds, torques and ambient temperatures as stated in chapter 6
‘Technical Data’ are not exceeded.
•The maximum permissible bore diameters must not be exceeded.
•Check whether the shaft-hub connections safely transmit the occurring operating torques.
•The standard tolerance of RINGFEDER® TNS for finish bores is fit H7.
•Standard keyways comply with DIN 6885, sheet 1.
•Check the dimensions and tolerances of shafts, hub bores, keys and keyways.
•Set screws as required.
7.2 Finish Bores
The following procedure has to be followed to produce a finish bore in a coupling hub:
• Clean and remove all preservatives from the coupling hubs.
• Mount the coupling hub in between the surfaces marked with 

and carefully align the hub
to the outer diameter of the claw pattern.
• The values for ød1max listed in table 1 are valid for keyed connections according to DIN
6885/1 and must not be exceeded.
• Select the bore fit so that an interference fit such as H7/m6 results when mating it with the
shaft tolerance.
• Axially lock the hub by means of a setscrew on the back of the hub above the keyway.
Consult RINGFEDER POWER TRANSMISSION in case of other shaft-hub connections.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 9 -
Fig. 3
• The stated maximum bore diameters are valid for keyed connec-
tions according to DIN 6885/1 and must not be exceeded.
• If these values are exceeded, the coupling can break.
• Flying off coupling fragments are a danger to life!
7.3 Coupling Installation
• Remove the elastic buffer ring (Fig. 3,
pos. 1).
• Prior to installation, carefully clean the
bores of the coupling hubs and the shaft
ends. The surfaces must be clean, dry
and free of grease.
• For larger couplings use suitable
mounting tools and hoisting devices
such as cranes or pulley blocks.
• Mount the coupling hubs in the proper
position on the shaft ends (Fig. 3, pos.2)
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 10 -
Fig. 4
Fig. 5
Note:
To facilitate mounting, the hub can be uniformly heated to 80°C to 120°C.
 Warning!
 Always wear heat-resistant gloves to protect yourself against
injuries due to hot coupling components!
• Mount the hubs in such a manner
that the shaft end is flush with the
inner bore openings (Fig. 4).
Observe deviant agreements, which
may exist!
• When tightening setscrews, secure
them with an adhesive, such as e.g.
Loctite 222, to prevent the screws
from working loose and dropping
out.
ATTENTION!
Let the hot hubs cool down to ambient temperature, before inserting the buffer ring.
• To facilitate mounting, the buffer
ring can be coated with a lubricant
(for ex. talcum for Perbunan Pb, or
commercial roller bearing grease for
polyurethane Vk).
• Install the buffer on one of the
coupling halves.
• Push the shaft ends with the
mounted coupling halves together.
(Fig. 5).
• Align the coupling in accordance
with the instructions given in chapter
8 ‘Coupling Alignment’.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 11 -
8 Coupling Alignment
 Danger of Injuries!
 Disconnect the drive before carrying out any work on the
coupling.
 Secure the drive against unintentional re-start and rotation!
 Note:
 Accurate alignment of the coupling prolongs the lifetime of the
elastic buffer ring.
 It is of utmost importance to observe the recommended alignment
values. Exceeding the permissible misalignment values results in
coupling damages and failures!
 When aligning the cold equipment take into account the expected thermal growth of the
components, so that the permissible misalignment values for the coupling are not
exceeded in operation.
 Be aware that the coupling under misalignment imposes restoring forces on the adjacent
shafts and bearings. Take into account that the larger the misalignment, the greater the
restoring forces will be.
• The displacements values indicated in the tables 2 to 4 are maximum permissible guide
numbers.
We recommend not to fully utilise these values during the alignment, so that in operation
sufficient reserves remain for thermal expansions, foundation settlements etc.
 In special cases with high demands on quiet running or high rotating speeds it is possible
that, in the three displacement levels, an alignment accuracy of ≤0,1 mm is necessary.
 If the coupling is mounted in a closed housing/ guard, so that alignment at a later point of
time will no longer be possible, make sure that the geometry and the fitting accuracy of
the contact surfaces ensure true alignment of the shafts within the specified tolerances
during service.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 12 -
8.1 Angular Misalignment ∆
∆
∆
∆Kw
• Measure one complete revolution
(360°) on the face of the outer di-
ameter. Determine the largest devia-
tion Kw1 and the smallest deviation
Kw2 (Fig. 6). Calculate the angular
misalignment:
∆Kw= Kw1 – Kw2.
• The values in table 2 are valid for a
reference rotation speed of
1500 min-1.
Table 2 Maximum permissible angular misalignment values:
Size 50 70 85 100 125 145 170 200 230 260 300 360 400
∆Kwmax [mm] 0,3 0,4
0,4 0,4 0,6 0,6 0,6 0,6 0,6 0,6 0,6 0,6 0,6
8.2 Radial Misalignment ∆
∆∆
∆Kr
• Measure one complete revolution
(360°). Determine the largest devia-
tion Kr1 and the smallest deviation
Kr2 (Fig. 7).
Calculate the radial misalignment:
∆Kr= 0,5 x (Kr1 – Kr2). Observe the
preceding sign of the measured
values.
• The values of table 3 are valid for a
reference rotation speed of
1500 min-1.
Table 3 Maximum permissible radial misalignment values:
Size 50 70 85 100 125 145 170 200 230 260 300 360 400
∆Krmax [mm] 0,4 0,5 0,6 0,6 0,7 0,7 0,7 0,8 0,8 0,9 0,9 1,0 1,0
Fig. 6
Fig. 7
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 13 -
8.3 Axial Misalignment
• Measure the axial claw overlap ‘h’
as shown in Fig. 8.
• The dimension of h must be in bet-
ween the values hmin and hmax stated
in table 4.
ATTENTION!
Consult RINGFEDER POWER
TRANSMISSION if larger axial
misalignments are expected
during operation.
Table 4 Recommended axial alignment values:
Size 50 70 85 100 125 145 170 200 230 260 300 360 400
hmax [mm] 12 18 18 20 25 30 30 35 35 45 50 55 55
hmin [mm] 11 16,5 16 18 22,5 27,5 27 32 31,5 41 46 51 51
Fig. 8
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 14 -
9 Operation
When operating the coupling, its specific technical data have to be carefully observed (see
chapter 6 ‘Technical Data’). These values must never be exceeded without the prior written
approval by RINGFEDER POWER TRANSMISSION.
In order to ensure trouble-free and reliable performance of the coupling, the coupling has to
be designed according to the selection specifications, e.g. according to DIN 740, part 2, (or
acc. to Product Paper & Tech Paper ”Elastomer Jaw Couplings“), with a service factor
appropriate to the service conditions. Any change in the service conditions or service
parameters always necessitates the verification of the coupling design.
 Danger of injuries!
 Disconnect the drive before carrying out any work on the coupling!
 Secure the drive against unintentional re-start and rotation!
 Improperly tightened screws may cause parts to fly off what leads
to most serious personal injuries and property damages!
 Before putting the coupling into operation, check the align
ment and
all screwed connections for correct tightening torque and firm fit!
 Before starting up the equipment, install all protective guards in
order to avoid unintentional contact with freely moving or rotating
parts.
 To avoid sparks, the covers for couplings used should be made of
stainless steel!
 The covers have to comply with protection type IP2X as a mini-
mum.
 The cover shall be designed to prevent dust from depositing on
the coupling parts.
While operating the coupling, pay attention to:
 Changes in operation noises
 Occurring vibrations
Attention!
• Disconnect the drive immediately, if any irregularities are observed while operating
the coupling!
• Identify the cause for the problem using table 5 “Operation Faults and Possible Causes“
and correct the fault.
The listed problems are some examples to assist you in troubleshooting.
• All the machinery components and operation modes have to be considered for the
determination and correction of faults.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 15 -
Table 5 Operation Faults and Possible Causes:
Trouble Cause Risk Warning Correction
Alignment fault Strong heating of
the coupling.
Rash abrasion of
the elastic
buffers. Extended
reaction forces to
enclosed aggre-
gates.
-Disconnect drive
-Remove cause for alignment fault
-Re-align coupling
-Inspect elastomer for wear
Elastomer worn
out Coupling claws clash together,
risk of ignition
due to spark
formation.
Extended
reaction forces.
-Disconnect drive
-Check coupling components for
damages and replace parts, if neces-
sary
-Replace elastomer
Unbalance Strong heating of
the coupling.
Rash abrasion of
the elastic
buffers. Extended
reaction forces.
-Disconnect drive
-Verify balance state of plant compo-
nents and correct it, if necessary
-Inspect elastomer for wear
Irregular
running
noises/
vibrations
Loose screw
connections Loose parts may fly away and
cause severe
damage.
-Disconnect drive
-Check coupling parts for damages,
replace parts, if necessary
-Verify alignment of coupling
-Tighten screws to the specified
tightening torque and secure them
against working loose, if necessary,
-Inspect elastomer for wear
Alignment fault Strong heating of
the coupling.
Extended
reaction forces to
enclosed aggre-
gates.
-Disconnect drive
-Remove cause for alignment fault
-Re-align coupling
-Inspect elastomer for wear
Unacceptable
temperatures Material proper- ties of the elastic
buffers deterio-
rate. The nego-
tiability is dero-
gated.
-Disconnect drive
-Replace elastomer
-Re-align coupling
-Adjust ambient temperature
Premature
wear of
elastomer
Contact with
aggressive
products
Material proper-
ties of the elastic
buffers deterio-
rate. The nego-
tiability is dero-
gated.
-Disconnect drive
-Check coupling parts for damages
and replace parts, if necessary
-Replace elastomer
-Verify alignment of coupling
-Prevent contact with aggressive
products
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 16 -
Trouble Cause Risk Warning Correction
Torsional
vibra
tions in the
drive line
Strong heating of
the coupling.
Rash abrasion of
the elastic
buffers. Extended
reaction forces.
-Disconnect drive
-Analyse and eliminate cause for
torsional vibrations
-Check coupling parts for damages
and replace parts, if necessary
-Replace elastomer and consult
RINGFEDER POWER
TRANSMISSION concerning eventual
use of another Shore-hardness
-Verify coupling alignment
Wear limit
of elas-
tomer
exceeded
===>
contact
with claws
Coupling is
destroyed.
Enclosed aggre-
gates may be
affected.
-Disconnect drive
-Replace coupling
-Inspect the elastomer for wear at
shorter intervals
Claw break-
age
Overload
due to too
high torque
Coupling is
destroyed.
Enclosed aggre-
gates may be
affected.
-Disconnect drive
-Verify coupling design in cooperation
with RINGFEDER POWER
TRANSMISSION
-Replace coupling
-Install larger coupling, if necessary
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 17 -
10 Maintenance
The flexible couplings RINGFEDER® TNS S-St / TNS S-LSt only require little maintenance
during operation. The elastic buffer ring is subject to wear. The time at which the wear limit
of the elastic buffer ring is reached depends on the service parameters and application
conditions.
On the occasion of routine inspections or maintenance of the equipment, check:
•alignment of coupling,
•state of elastomer, and
•remove dust deposits from coupling parts and buffer ring.
10.1 Wear Inspection on the Buffer Ring
 Danger of injuries!
 Disconnect the drive before carrying out any work on the coupling!
 Secure the drive against unintentional re-start and rotation!
Perform a visual inspection and a wear inspection of the buffer ring after
2000 hours, or after 3 months at latest, after the first start-up of the equip-
ment. If only minor wear or no wear is observed, further inspections of the
plant can be carried out at regular intervals of 4000 hours, however, at least
once a year, if the operating modes and conditions of the plant remain
unchanged. However, should you observe excessive wear on the occasion
of this first inspection already, check whether the cause for the problem is
listed in table 5 “Operation faults and possible causes”. In such a case, the
inspection intervals must be adapted to the prevailing service conditions.
On the occasion of routine inspections or maintenance work on the drive equipment, or after
3 years at latest:
• Replace the elastic buffer ring.
• If the wear limit has been reached or exceeded, replace the buffer ring immediately,
irrespective of the inspection intervals of the equipment.
• Check the alignment of the coupling.
Remove dust deposits from the coupling components and buffer ring.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 18 -
Fig. 9
10.2 Wear Inspection while the equipment is at standstill
• To inspect the wear of the elas-
tomer, the plant has to be shut
down and must be unloaded. Turn
the coupling halves in such a man-
ner that the claws rest without
clearance at the buffers of the elas-
tic ring.
• Measure the claw distance ‘V’ in
circumferential direction across the
buffers to which the claws rest on
both sides. The adjacent buffers do
not contact the claws.
• Repeat this measurement on the
adjacent buffers after having turned
the couplings halves against each
other in opposed direction.
• If the dimension ‘V’ attains or
exceeds the value „Vmin“ listed in table 6 for the individual coupling sizes, the elastic buffer
ring has to be replaced immediately.
Table 6 Distance dimension Vmin for wear measurement while the plant is at
standstill:
Size 50 70 85 100 125 145 170 200 230 260 300 360 400
Vmin [mm] 11,4
11,7 8,0 11,4 12,7 13,8 13,6 14,3 15,4 15,3 12,1 12,1 15,4
Upon completion of the wear measurement, re-install all the protective devices and covers.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

- 19 -
Fig. 10
10.3 Replacement of the buffer ring
 Danger of injuries!
 Disconnect the drive before carrying out any work on the
coupling!
 Secure the drive against unintentional re-start and rotation!
• Draw back one coupling half (Fig.
10).
• Remove the buffer ring (part 020).
• To facilitate mounting, the elastic
buffer ring can be coated with a
lubricant before installing it (e.g.
talcum for Perbunan Pb, commercial
roller bearing grease for Polyure-
thane Vk).
• Mount a new buffer ring of correct
material and size.
• Push the two coupling halves
together.
• Align the coupling according to the
instructions given in chapter 8 ‘Cou-
pling Alignment’.
Warning!
 Before putting the equipment into service, all safety guards
must be installed to prevent unintentional contact with
freely rotating parts.
 To avoid sparks, the covers for couplings used should be
made of stainless steel.
 The covers have to fulfil the requirements of protection type
IP2X as a minimum.
 The covers have to be designed to prevent dust from
depositing on the coupling parts.
 The cover must not touch the coupling and impair the
proper operation of the coupling.
We do not assume any responsibility or warranty for any damages resulting from the use of
accessories or spare parts, which have not originally been manufactured by RINGFEDER
POWER TRANSMISSION.
11 Disposal
Disposal of the parts must be arranged in accordance with the regulations and laws of the
country where the equipment is installed.
BAWS 001-GBR-1 RINGFEDER® TNS S-St, TNS S-LSt

RINGFEDER POWER TRANSMISSION GMBH
Werner-Heisenberg-Straße 18, D-64823 Groß-Umstadt, Germany · Phone: [phone] · Fax: [phone]
E-mail: [e-mail]
RINGFEDER POWER TRANSMISSION TSCHAN GMBH
Zweibrücker Straße 104, D-66538 Neunkirchen, Germany · Phone: [phone] · Fax: [phone]
E-mail: [e-mail]
RINGFEDER POWER TRANSMISSION USA CORPORATION
165 Carver Avenue, Westwood, NJ 07675, USA · Toll Free: [phone] · Phone: [phone] · Fax: [phone]
E-mail: [e-mail]
HENFEL INDÚSTRIA METALÚRGICA LTDA.
Av. Major Hilário Tavares Pinheiro, 3447 · CEP 14871 300 · Jaboticabal - SP - Brazil · Phone: [phone]
E-mail: [email protected]
RINGFEDER POWER TRANSMISSION INDIA PRIVATE LIMITED
Plot No. 4, Door No. 220, Mount - Poonamallee Road, Kattupakkam, Chennai – 600 056, India
Phone: [phone] · Fax: [phone] · E-mail: [e-mail]
KUNSHAN RINGFEDER POWER TRANSMISSION COMPANY LIMITED
NO. 406 Jiande Road, Zhangpu 215321, Kunshan, Jiangsu Province, China
Phone: [phone] · Fax: [phone] · E-mail: [e-mail]
Partner for Performance
www.ringfeder.com