RINGFEDER TNM LG User manual

EN
08.2019
Elastomer Jaw Couplings
RINGFEDER® TNM LG
Installation and Operation Manual
Partner for Performance www.ringfeder.com

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Table of Contents
Chapter Page
1Notes on safety.................................................................................................................2
2Technical Description .......................................................................................................3
2.1 Intended Application..................................................................................................3
3Marking of the coupling.....................................................................................................3
4Storage.............................................................................................................................4
5Construction .....................................................................................................................4
6Technical Data..................................................................................................................5
7Installation ........................................................................................................................7
7.1 To be observed prior to installation............................................................................7
7.2 Finish Bores...............................................................................................................7
7.3 Coupling installation ..................................................................................................8
8Coupling Alignment.........................................................................................................10
8.1 Angular misalignment ∆Kw.......................................................................................11
8.2 Radial misalignment ∆Kr..........................................................................................11
8.3 Axial misalignment...................................................................................................12
9Operation........................................................................................................................13
9.1 Check of direction of rotation...................................................................................16
10 Maintenance ...................................................................................................................18
10.1 Wear inspection on the buffer ring...........................................................................18
10.2 Wear limit of the buffer ring .....................................................................................19
10.3 Replacement of the buffer ring ................................................................................19
11 Waste Disposal...............................................................................................................20
1 Notes on safety
The present assembly and operating instruction (AOI) constituents a part of the coupling
supply. Always keep the AOI near the coupling well accessible.
The German version of this manual is the predominant and binding version.
Make sure that all persons charged with the assembly, operating, service, and maintenance
have read and understood the AOI and follow all the points:
-Avert hazards for body and live of the user and third parties.
-Ensure the operating safety of the coupling.
-Avoid the loss of use and environmental impairment through false handling.
In the case of transport, mounting, dismounting and maintenance, attention is to be paid to
the relevant regulations for industrial safety and for environmental care.
The coupling may only be operated, mounted, serviced and maintained by authorised and
trained personnel.
The user must take into account that the bolting elements of coupling parts may be adversely
affected by the heat produced by a brake disk/ brake drum due to the resultant friction. Make
sure that the combination of the employed brake lining with the material of the brake disk/
brake drum does not lead to sparks or impermissible thermal growth. The brake disk is
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normally made of steel, and the brake disk is normallymade of cast iron with nodular graph-
ite. In case of any doubt, please consult the supplier!
In the interest of further development, we reserve the right to make changes which serve
technological progress.
By the use of accessories and spare parts, which were not originally manufactured by
RINGFEDER POWER TRANSMISSION, we are not responsible for any resulting damage
or liability or guarantee.
2 Technical Description
The RINGFEDER® TNM LG couplings are torsionally flexible, puncture proof claw couplings.
They compensate for angular, radial and axial shaft misalignments within defined limits. The
coupling transmits torque through elastic buffers loaded in compression. These buffers come
in Perbunan (Pb), and are connected to each other to form an intermediate buffer ring.
The buffer ring dampens shocks and torsional vibrations. It is resistant to oil and electrically
conductive.
One of the coupling halves consists of two parts which allows for the easy separation of the
coupled machines. The direction of rotation can be checked after having retracted the claw
ring. It is also possible to radially remove a coupling half. The buffer ring can be replaced
without having to displace the machines.
The coupling is suitable for use in both directions of rotation and any 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.
3 Marking of the coupling
The product line RINGFEDER® TNM LG has its hardness in Shore (A) indicated on the
elastic intermediate ring.
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Fig. 1 Construction RINGFEDER® TNM LG
4 Storage
On receipt of the goods, the supply is to be checked immediately for completeness and
correctness. Possible damages incurred during transit and / or missing parts are to be
notified in writing.
The coupling parts can be stored in their delivered standard-state for 6 months in a dry,
roofed place at normal room temperature. For a longer storage duration a long-term preser-
vation is necessary (consult RINGFEDER POWER TRANSMISSION). The elastic
intermediate ring must not be subjected to ozone containing mediums, direct solar influence
or strong light sources with ultraviolet-light. The relative humidity must not exceed 65%. In
the case of proper storage the characteristics of the elastic intermediate ring remain
unchanged for almost up to three years.
5 Construction
Note:
The claw ring (part 3) and the flange hub (part 4) arrive bolted to each other.
Balanced parts are match-marked to each other.
1 Cheese head screw DIN 912
2 Lock washer
3 Claw ring, part 102
4 Flange hub, part 104
5 Elastic buffer ring, part 010
6 Coupling flange, part 130-155 (LG)
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6 Technical Data
Table 1 Technical Data:
Size
TNM
LG
TKnom.
Pb72
[Nm]
TKmax
Pb72
[Nm]
TKnom.
Pb82
[Nm]
TKmax
Pb82
[Nm]
nmax
[rpm]
82 48 100 75 150 8000
97 96 200 150 210 7000
112 150 310 230 540 6000
128 250 500 380 650 5000
148 390 800 600 1350 4500
168 630 1300 980 1800 4000
194 1050 2000 1650 2400 3500
214 1500 3100 2400 4200 3000
240 2400 4800 3700 6200 2750
265 3700 7500 5800 8300 2500
295 4900 10000 7550 10500 2250
330 6400 13000 9900 14500 2000
370 8900 18200 14000 20000 1750
415 13200 27000 20500 27000 1500
480 18000 36000 28000 66000 1400
575 27000 54000 41000 97500 1200
Table 2
Technical Data RINGFEDER® TNM LG
Size
TNM
LG
d1
max
[mm]
d2
[mm]
d3
[mm]
d4
[mm]
d5
[mm]
d6
h8
[mm]
d7
[mm]
z
num-
ber
l1
[mm]
l2
[mm]
lG
[mm]
L
[mm]
S1
[mm]
S2
[mm]
m
not bored
[kg]
82-120 32 40 44,5 108 82 120 6,6 6 16 8 40 68 3,0 12 1,8
97-144 39 50 54,5 128 97 144 9,0 6 20 10 49 83 3,0 14 2,9
112-158 46 60 64,5 142 112 158 9,0 6 22 10 58 95 3,5 15 4,4
128-180 53 70 74,5 160 128 180 11,0 6 25 13 68 109 3,5 16 6,7
148-200 65 90 92,5 180 148 200 11,0 7 28 13 78 124 3,5 18 9,8
168-220 75 100 104,5 200 168 220 11,0 8 34 13 87 142 3,5 21 14,0
194-248 85 115 121,5 224 194 248 13,5 8 38 16 97 159 3,5 24 21,0
214-274 95 130 135,5 250 214 274 13,5 8 42 16 107 175 4,0 26 27,9
240-314 100 145 146,0 282 240 314 17,5 8 45 20 117 192 4,0 30 37,6
265-344 115 160 164,0 312 265 344 17,5 8 50 20 137 220 5,5 33 53,4
295-380 130 170 181,0 348 295 380 17,5 9 52 22 147 236 8,0 37 70,2
330-430 135 200 208,0 390 330 430 22,0 9 56 25 156 252 8,0 40 91,7
370-480 160 235 241,0 440 370 480 22,0 10 62 25 176 281 8,0 43 126,0
415-575 180 270 275,0 528 415 575 26,0 10 65 30 196 306 8,0 45 183,9
480-615 190 320 289,0 568 480 615 26,0 10 65 30 220 330 8,0 45 244,7
575-692 260 400 368 645 575 692 26,0 10 65 30 240 350 8,0 45 370,1
Fig. 2 RINGFEDER® TNM LG
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The torques TKnom and TKmax. are valid for:
-buffer rings made from Perbunan Pb72 or Pb82,
-ambient temperatures of -40°C up to + 60°C,
-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, we recommend to balance the coupling.
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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 damage!
• 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
objects.
• To avoid sparks, covers made of stainless steel must be used!
• As a minimum, the covers have to fulfill the requirements of
protection type IP2X.
•
The covers must be designed to prevent dust from depositing on
the coupling.
• The cover must not contact the coupling nor im
pair the 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® TNM 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 observed to produce a finish bore in a coupling hub:
• Clean and remove all preservatives from the coupling hub.
• Mount the coupling hub between the surfaces marked with 

and carefully align the
coupling hub.
• The values for Ød1max listed in table 2, 3 and 4 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, for example by means of a setscrew on the back of the hub above
the keyway
Contact RINGFEDER POWER TRANSMISSION if other shaft-hub connections are used.
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Fig. 4
• 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 coupling debris are a danger to life!
7.3 Coupling installation
• Remove the elastic buffer ring (Fig.
4, pos. 1).
• Prior to installation, carefully clean
the bore of the flange hub and the
shaft end. 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 hub in the proper
position on the shaft end (Fig. 4,
pos. 2).
Note:
To facilitate mounting, the hub can be heated to 80°C to 120°C. Take care for uniform
heating.
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Fig. 5
Fig. 6
 Warning!
 Always wear heat-resistant gloves to protect yourself against
injuries due to hot coupling components!
• Mount the hub in such a manner
that the shaft end is flush with the
inner bore opening (Fig. 5). Ob-
serve other mounting procedures
that may have been agreed upon
in that regard!
• When tightening setscrews, secure
them with an adhesive, such as
e.g. Loctite 222, to prevent the
screws from working loose or drop-
ping out.
• Mount the coupling flange to the
flange connection. Take care that
the parts do not become canted at
the centering seat (Fig. 4, pos. 2).
ATTENTION!
The contact surfaces of the coupling flange and flange connection must be clean, dry
and free of grease. Balanced parts are match-marked to each other.
ATTENTION!
Let the hot hub cool down to ambient temperature, before inserting the buffer ring.
• To facilitate mounting, the buffer
ring can be coated with a sliding
substance (e.g. talcum).
• Install the buffer ring in one of the
coupling halves.
• Push together the shaft end with
the mounted coupling half and the
coupling flange (Fig. 6).
• Align the coupling in accordance
with the instructions given in chap-
ter 8 'Coupling Alignment’.
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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 rotating!
 Note:
 Precise alignment of the coupling increases the lifetime of the
intermediate 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 maximum permissible misalignments stated in tables 5 to 7 are guiding values.
We recommend not to fully utilize these values when aligning the coupling, so as to have
sufficient reserves for thermal growth, foundation settlings etc. during operation.
• In special applications with high demands on quiet running characteristics or higher
speeds, alignment accuracies of ≤0.1 mm may be necessary for the three alignment
levels.
• If the coupling is mounted in a closed housing/ guard, so that alignment is no longer
possible at a later point of time, make sure that the geometry and the fitting accuracy of
the contact surfaces ensure true alignment of the shafts within the specified tolerances
during operation.
RINGFEDER® TNM LG
BAWN 009-GBR-1