RINGFEDER TNM E User manual

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

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Content
Chapter Page
1Notes on safety................................................................................................................. 2
2Function............................................................................................................................ 3
2.1 Appropriate Use.........................................................................................................3
3Marking of the coupling.....................................................................................................3
4Storage ............................................................................................................................. 4
5Construction ..................................................................................................................... 5
6Technical data .................................................................................................................. 6
7Assembly .......................................................................................................................... 7
7.1 Pay attention before the assembly ............................................................................7
7.2 Finished borehole......................................................................................................7
7.3 Coupling installation ..................................................................................................8
8Adjusting coupling .......................................................................................................... 10
8.1 Angular misalignment ∆Kw.......................................................................................11
8.2 Radial displacement ∆Kr..........................................................................................11
8.3 Axial displacement.................................................................................................. 12
9Operation........................................................................................................................ 13
10 Maintenance .................................................................................................................. 16
10.1 Wear Inspection on the Buffer Ring.........................................................................16
10.2 Wear limit of elastic buffers......................................................................................17
10.3 Changing the elastic intermediate ring ....................................................................18
11 Waste Disposal .............................................................................................................. 18
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 normally made 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 Function
The coupling RINGFEDER® TNM E is a torsionally elastic and puncture-proof claw
coupling.
It balances out angular, radial and axial shaft misalignments within defined limits. The
coupling transfers the torque via pressure loadable, elastic buffers of Perbunan (Pb) which
are joined together as an intermediate ring.
The elastic intermediate ring can cushion impacts and torsional vibrations; it is oil-tight and
electrically conductive.
The coupling is usable in every sense of rotation and installation position.
2.1 Appropriate Use
•In order to ensure a faultless, lasting operation of the coupling, it must be laid out accord-
ing to the layout instructions e.g. DIN 740 part 2 (or also Product Paper & Tech Paper
•”Elastomer Jaw Couplings“) with an operating facture corresponding to the operating
conditions.
•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.
•Apart from incorporating a finished bore hole with parallel key groove (see „7.2 Finished
borehole”) no further changes can be carried out on the coupling.
•The coupling may only be used within the framework of the conditions defined in the
performance and delivery contract.
•Every change of the conditions of use or the operating parameters necessitates a new
verification of the coupling layout.
3 Marking of the coupling
The product line RINGFEDER® TNM has its hardness in Shore (A) indicated on the
elastic intermediate ring.
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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.
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5 Construction
1 Coupling hub part 101
2 Elastic intermediate ring part 010
Fig. 1 Construction RINGFEDER® TNM E
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6 Technical data
Table 1 Technical data:
Size
TNM
E
TCnom
Pb72
[Nm]
TCpeak
Pb72
[Nm]
TCnom
Pb82
[Nm]
TCpeak
Pb82
[Nm]
nmax
[min-1]
d1
max
[mm]
d3
[mm]
d5
[mm]
lE
[mm]
LE
[mm]
S1
[mm]
m
unbored
[kg]
50 13 27 20 45 12500 19 33 50 25 52,0 2,0 0,4
67 22 45 35 75 10000 28 46 67 30 62,5 2,5 1,0
82 48 100 75 160 8000 32 53 82 40 83,0 3,0 1,8
97 96 200 150 340 7000 42 69 97 50 103,0 3,0 3,4
112 150 310 230 540 6000 48 79 112 60 123,5 3,5 5,3
128 250 500 380 860 5000 55 90 128 70 143,5 3,5 8,2
148 390 800 600 1350 4500 65 107 148 80 163,5 3,5 12,7
168 630 1300 980 2250 4000 75 124 168 90 183,5 3,5 19,3
194 1050 2000 1650 3630 3500 85 140 194 100 203,5 3,5 27,8
214 1500 3100 2400 5400 3000 95 157 214 110 224,0 4,0 38,2
240 2400 4800 3700 8650 2750 110 179 240 120 244,0 4,0 53,4
265 3700 7500 5800 13500 2500 120 198 265 140 285,5 5,5 75,0
295 4900 10000 7550 18000 2250 130 214 295 150 308,0 8,0 95,7
330 6400 13000 9900 23400 2000 150 248 330 160 328,0 8,0 132,9
370 8900 18200 14000 32750 1750 170 278 370 180 368,0 8,0 187,7
415 13200 27000 20500 49000 1500 190 315 415 200 408,0 8,0 259,3
480 18000 36000 28000 66000 1400 210 315 415 220 448,0 8,0 328,7
575 27000 54000 41000 97500 1200 230 350 575 240 488,0 8,0 466,9
The torque TCnom and TCpeak is valid for:
-Intermediate rings of Perbunan Pb72 and/or Pb82,
-Ambient temperatures of -40 °C to +60 °C,
-Operation within the stipulated alignment values.
During the layout of the coupling according to DIN 740 part 2 (or also Product Paper & Tech
Paper ”Elastomer Jaw Couplings“) different factors must be considered:
-with higher temperatures a corresponding temperature factor Sυ
-according to the starting frequency a starting factor Sz
-in dependence of the operating conditions an impact factor, SA, SL
With circumferential speeds of more than 22 m/s, we recommend to balance the coupling.
Fig. 2 RINGFEDER® TNM E
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7 Assembly
7.1 Pay attention before the assembly
• 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 in explosive
atmospheres 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 depos
iting 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® 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 Finished borehole
For the completion of the finished borehole in a coupling hub, pay attention to following
procedure:
• Clean the coupling hub of preservatives.
• Tighten the coupling hub to the surfaces marked with 

and carefully align the coupling
hub.
• The indicated values in table 1 for ød1max are valid for a parallel key connection according
to DIN 6885/1 and must not be exceeded.
• Choose the borehole fit so that during the union with the shaft tolerance a wringing fit
and/or an interference fit as for example at H7/m6 is carried out.
• Provide a setscrew for axial securing on the hub back above the parallel key slot.
In the case of other shaft hub connections, consultation with RINGFEDER POWER
TRANSMISSION is necessary.
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Fig. 3
• The maximum indicated bore diameters are valid for a parallel key
connection according to DIN 6885/1 and must not be exceeded.
• In the case of transgression of these values the coupling can
sever.
• Through flying away fragments danger exists!
7.3 Coupling installation
• Remove the elastic intermediate ring
(Figure 3, Pos. 1).
• Clean the boreholes of the coupling
hubs and the shaft ends before the
installation. The surfaces must be
clean, dry and grease-free.
• Use suitable installation aids and
hoists such as cranes or pulley
blocks in the case of bigger cou-
plings.
• Pull the coupling hub onto the shaft
end in its intended position (Figure 3,
Pos.2).
Reference:
For easier installation a uniform warming of the hub from 80 °C to 120 °C is safe
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Fig. 4
Fig. 5
 Warning!
 Only work with gloves as a protection against hot parts of the
coupling!
• Mount the hub so that the shaft ends
are flush with the interior borehole
opening (Figure 4).
• Pay attention to possible differing
agreements.
• Secure possible available setscrews,
by tightening with an adhesive e.g.
Loctite 222 against automatic loos-
ening and flying out.
ATTENTION!
Let the hot hubs cool off to ambient temperature before the introduction of the inter-
mediate ring.
• For easier mounting, the elastic
intermediate ring can be provided
with a slip additive (e.g. Talcum)
before introduction
• Fit the intermediate ring into one half
of the coupling.
• Push the shaft ends with the
mounted half of the clutch together
(Figure 5).
• Adjust the coupling according to the
following specifications in “8 Cou-
pling adjustment".
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8 Adjusting coupling
 Injury hazard!
 Switch-off the drive before all work on the coupling!
 Secure the drive against unintentional switching on and rotating!
 Reference:
 An exact alignment of the coupling increases the service life of the
elastic intermediate.

Do not exceed the maximum permissible displacement values. The
overstepping of these values results in coupling damage and
breakdown!
• 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 / casing so that a subsequent alignment is
not possible any more, it must be guaranteed that the geometry and fit accuracy of the
contact surfaces in operation aligns the shafts exactly within the mentioned tolerances.
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