RINGFEDER TNM GBT Series User manual

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

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Content
Chapter Page
1Notes on safety ................................................................................................................ 2
2Function ........................................................................................................................... 3
2.1 Appropriate Use ......................................................................................................... 3
3Marking of the coupling .................................................................................................... 4
4Storage ............................................................................................................................ 4
5Construction ..................................................................................................................... 5
6Technical data .................................................................................................................. 6
7Assembly ......................................................................................................................... 8
7.1 Pay attention before the assembly ............................................................................ 8
7.2 Finished borehole ...................................................................................................... 9
7.3 Installing coupling .................................................................................................... 10
8Adjusting coupling .......................................................................................................... 11
8.1 Angular misalignment DKw ....................................................................................... 12
8.2 Radial displacement DKr .......................................................................................... 12
8.3 Axial displacement ................................................................................................... 13
9Operation ....................................................................................................................... 14
9.1 Check of Direction of Rotation ................................................................................. 17
10 Maintenance................................................................................................................... 19
10.1 Wear Inspection on the Buffer Ring ......................................................................... 19
10.2 Wear limit of elastic buffers...................................................................................... 20
10.3 Changing the elastic intermediate ring .................................................................... 21
10.4 Assembly brake drum/disk....................................................................................... 22
11 Waste Disposal .............................................................................................................. 22
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.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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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
normally made of steel, and the brake drum is normally made of cast iron with nodular
graphite. 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 GBT, TNM GTW 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 elastic intermediate ring can be changed without axially shifting the machine.
The coupling is usable in every sense of rotation and installation position.
2.1 Appropriate Use
·The coupling must only be operated in normal industrial atmospheres. Since aggressive
media may attack the coupling components, screws and elastic buffer rings, they
represent a risk for the operational safety of the coupling. Consult RINGFEDER
POWER TRANSMISSION in such cases.
·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.
·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.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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3 Marking of the coupling
The product line RINGFEDER® TNM has its hardness in Shore (A) indicated on the
elastic intermediate ring.
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.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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5 Construction
Details:
Claw ring (Pos. 3) and flange hub (Pos. 4), coupling hub (Pos. 6) and brake drum/disk (Pos.
7/8) are always delivered screwed together.
Balanced parts are match marked to each other.
1 Pan-head screw DIN 912
2 Locking washer (caging-washer)
3 Claw ring part 102…0X3
4 Flange hub part 104
5 Elastic intermediate ring part 010
6 Coupling flange FE/FG part 102…0X4
Fig. 1 Construction RINGFEDER® TNM GBT, TNM GTW
1. Pan-head screw DIN 912
2. Locking washer (caging-washer)
3. Claw ring part 102
4. Flange hub part 104
5. Elastic intermediate ring part 010
6. Coupling hub part 108
7. Brake drum part 500
8. Twiflex-brake disk part 506
9. Locking washer (caging-washer)
10. Hexagon head screw DIN 933
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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6 Technical data
Table 1 Technical Data:
size
TNM
TCnom
Pb72
[Nm]
TCpeak
Pb72
[Nm]
TCnom
Pb82
[Nm]
TCpeak
Pb82
[Nm]
112 150 310 230 540
128 250 500 380 650
148 390 800 600 1350
168 630 1300 980 1800
194 1050 2000 1650 2400
214 1500 3100 2400 4200
240 2400 4800 3700 6200
265 3700 7500 5800 8300
295 4900 10000 7550 10500
330 6400 13000 9900 14500
370 8900 18200 14000 20000
415 13200 27000 20500 27000
Table 2 RINGFEDER® TNM GBT :
d
5
[mm]
D
B
-
B
[Nm]
T
BR
[Nm]
n
max
[min
-1
]
d
2
max
[mm]
d
6
max
[mm]
d
4
[mm]
d
7
[mm]
l
E
[mm]
l
G
[mm]
L
G
[mm]
C
[mm]
S1
[mm]
S2
[mm]
z x M x Ls
DIN 933 8.8
MA
[Nm]
m
undrilled
[kg]
112 200-75 450 4200 46 42 64,5 68 60 58 133 11,0 3,5±1,0 15±1,0 6 x M8 x 20 25 10,2
128 200-75 550 4200 53 52 74,5 85 70 68 154 16,0 3,5±1,0 16±1,0 6 x M8 x 25 25 13,0
148 250-95 1000 3400 65 58 92,5 94 80 78 176 16,0 3,5±1,0 18±1,0 6 x M10 x 25 49 21,5
168 250-95 1600
3400 75 72 104,5 118 90 87 198 19,0 3,5±1,5 21±1,5 8 x M10 x 30
8 x M10 x 30
49 27,8
315-118 2700 8,0 37,0
194 315-118 2750 2700 85 85 121,5 138 100 97 221 16,5 3,5±1,5 24±1,5 8 x M12 x 30 85 45,4
214 315-118 3350
2700 95 92 135,5 153 110 107 243 19,0 4,0±2,0 26±2,0 9 x M12 x 35
85 55,6
400-150 2100 12,5 71,4
240 450-150 4200
2100 100 102 146,0 168 120 117 267 18,0 4,0±2,0 30±2,0 10 x M12 x 35
85 83,5
500-190 1700 9,0 110,5
265 500-190 8700 1700 115 120 164,0 198 140 137 310 22,0 5,5±2,5 33±2,5 10 x M16 x 40 210 134,4
295 500-190 9800
1700 130 130 181,0 214 150 147 334 30,0 8,0±2,5 37±2,5 10 x M16 x 40
210
210
155,5
630-236 1360 5,0 10 x M16 x 45 209,1
330 630-236 10600
1360 135 150 208,0 248 160 156 356 11,0 8,0±2,5 40±2,5 10 x M16 x 45
210 240,2
710-265 1200 0,0 278,3
370 710-265 13500 1200 160 170 241,0 278 180 176 399 15,0 8,0±2,5 43±2,5 11 x M16 x 45 210 332,0
415 710-265 16000 1200 180 185 275,0 308 200 196 441 25,0 8,0±2,5 45±2,5 12 x M16 x 55 210 414,3
Fig. 2 RINGFEDER® TNM GBT, TNM GTW
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Table 3 RINGFEDER® TNM GTW:
d
5
[mm]
A
-
G
[Nm]
T
BR
[Nm]
n
max
[min
-1
]
d
2
max
[mm]
d
6
max
[mm]
d
4
[mm]
d
7
[mm]
l
E
[mm]
l
G
[mm]
L
G
[mm]
C
1
[mm]
C
2
[mm]
S1
[mm]
S2
[mm]
z x M x Ls
DIN 933 8.8
MA
[Nm]
m
undrilled
[kg
112 250-12,7 450
4580 46 42 64,5
68 60 58 133 55,8 2,5 3,5±1,0 15±1,0
6 x M8 x 16
25 9,0
300-12,7 3820 53,8 -2,5 6 x M8 x 22 12,0
128 300-12,7 550 3820 53 52 74,5 85 70 68 154 60,8 4,5 3,5±1,0 16±1,0 6 x M8 x 25 25 14,7
148 300-12,7 1000 3820 65 58 92,5 94 80 78 176 67,8 11,5 3,5±1,0 18±1,0 6 x M10 x 25 49 18,8
168 356-12,7 1600
3225 75 72 104,5
118 90 87 198 81,8 2,5 3,5±1,5 21±1,5 8 x M10 x 30 49 28,8
406-12,7 2825 84,8 31,6
194 406-12,7 2750
2825 85 85 121,5
138 100 97 221 90,8 8,5 3,5±1,5 24±1,5 8 x M12 x 30 85 40,6
457-12,7 2510 87,8 45,6
214 406-12,7 3350
2825 95 92 135,5
153 110 107 243 96,8 14,5 4,0±2,0 26±2,0
9 x M12 x 30
85 50,2
457-12,7 2510 93,8 9 x M12 x 35 55,2
240 457-12,7 4200
2510 100 102 146,0
168 120 117 267 100,8 21,5 4,0±2,0 30±2,0 10 x M12 x 35 85 67,2
514-12,7 2230 72,2
265 457-12,7 8700
2510 115 120 164,0
198 140 137 310 115,8 36,5 5,5±2,5 33±2,5 10 x M16 x 35 210 90,8
514-12,7 2230 95,8
295 514-12,7 9800
2230 130 130 181,0
214 150 147 334 123,8 44,5 8,0±2,5 37±2,5 10 x M16 x 35 210 117,0
610-12,7 1880 128,0
330 514-12,7 10600
2230 135 150 208,0
248 160 156 356 129,8 50,5 8,0±2,5 40±2,5 10 x M16 x 40 210 148,0
610-12,7 1880 159,0
370 610-12,7 13500
1880 160 170 241,0
278 180 176 399 143,8 64,5 8,0±2,5 43±2,5
11 x M16 x 40
210 210,9
711-12,7 1615 140,8 11 x M16 x 45 226,6
415
610-12,7
16000
1880
180 185 275,0
308 200 196 441
160,8
81,5 8,0±2,5 45±2,5
12 x M16 x 40
210
280,8
711-12,7 1615 157,8 12 x M16 x 45 296,2
812-12,7 1410 151,8 12 x M16 x 50 329,2
915-12,7 1255 359,6
The torque TCnom and TCpeak is valid for:
-Intermediate rings of Perbunan Pb72 and/or Pb82,
-Ambient temperatures of -30 °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 Su
-according to the starting frequency a starting factor Sz
-in dependence on the operating conditions an impact factor, SA, SL
With circumferential speeds of more than 22 m/s, we recommend to balance the coupling.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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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!
·Assemble the coupling outside of the danger zone. Take care that
suitable transportation means are at disposal and that the transpor-
tation ways are free of obstacles.
·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 intended rotational speeds and torques as well as the ambient
tem-peratures do not exceed the values indicated in “6 Technical Data”.
·The maximum permissible borehole diameter must not be exceeded.
·Check whether the shaft hub connections can safely transmit the occurring operating
torques.
·The standard RINGFEDER® TNM tolerance for the finished boreholes is fit H7.
·Standard parallel key slot is according to DIN 6885 page 1.
·Check the dimensions and tolerances of shafts, hub boreholes, parallel key and slot.
·Adjust setscrews as required.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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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 faces labelled with éand carefully align the coupling hub.
·The indicated values in table 2 and 3 for ød2max and ød6max 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.
·
The maximum indicated borehole 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!
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Fig. 4
Fig. 3
7.3 Installing coupling
·Remove the elastic intermediate ring (Figure
3, pos. 1).
·Clean the borehole of the flange hub and the
shaft end before installing. 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 couplings.
·Pull the pre-mounted coupling halves in the
intended position on the shaft ends (Figure 3,
pos. 2).
Reference:
For easier installation a uniform warming of the hub to 80 °C to 120 °C is safe.
§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 loosen-
ing and flying out.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Fig. 5
ATTENTION!
Let the hot hub cool off to ambient temperature before the introduction of the interme-
diate 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 end with the mounted
coupling halves together (Figure 5).
·Adjust the coupling according to the follow-
ing specifications in “8 Coupling adjustment”.
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 ring.
§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 4 to 6 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.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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8.1 Angular misalignment DKw
·Measure on the face of the
external diameter a complete
rotation (360°). Determine in this
case the greatest deviation DKw1
as well as the smallest deviation
DKw2 (Figure 6).
·Calculate the angular misalign-
ment DKw = DKw1 - DKw2.
·The values in table 4 are valid for
a reference rotation speed of
1500 min-1.
Table 4 Maximum permissible displacement values - angular:
Size 112 128 148 168 194 214 240 265 295 330 370 415
DK
w max
[mm]
0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3
8.2 Radial displacement DKr
·Measure a complete rotation (360°).
Determine in this case the greatest
deviation DKr1 as well as the smallest
deviation DKr2 (Figure 7).
·Calculate the radial displacement
DKr = 0,5 x (DKr1 - DKr2). Pay atten-
tion to the operational sign of the
measured values.
·The values of table 5 are valid for a
reference rotation speed of
1500 min-1.
Table 5 Maximum permissible displacement values - radial:
Size 112 128 148 168 194 214 240 265 295 330 370 415
DK
r max
[mm]
0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3 0,3
Fig. 6
Fig. 7
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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8.3 Axial displacement
·Measure the axial S1 gap measurement
according to figure 8.
·Keep, when aligning the gap measurement S,
to the maximum permissible tolerance X
according to table 6.
ATTENTION!
If greater axial displacements are expected in
operation, consultation with RINGFEDER
POWER TRANSMISSION is necessary.
Table 6 Recommended alignment values - axial:
Size
112 128 148 168 194 214 240 265 295 330 370 415
S [mm] 3,5 3,5 3,5 3,5 3,5 4 4 5,5 8 8 8 8
X [mm] ±1 ±1 ±1 ±1,5 ±1,5 ±2 ±2 ±2,5 ±2,5 ±2,5 ±2,5 ±2,5
Fig. 8
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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9 Operation
When using the coupling attention is to be paid to its characteristics (see „6 Technical data”).
These can in no case be exceeded without having a written agreement from RINGFEDER
POWER TRANSMISSION. In order to guarantee a faultless, lasting operation of the
coupling, it must be laid out accord-ing to the regulations e.g. DIN 740 part 2 (or according
to Product Paper & Tech Paper ”Elastomer Jaw Couplings“) with an operating factor
corresponding to its operating conditions. Every change of the conditions of use or the
operating parameters makes an inspection of the coupling layout urgently necessary.
§
Injury danger!
§Switch-off the drive before all work on the coupling!
§Secure the drive against unintentional switch-on and rotating!
§Due to incorrectly tightened screws parts can fly away and cause
serious injuries to persons and damage to material!
§Check before commissioning the coupling the alignment and all
screw fastenings for their specified tightening torque and/or firm
seating!
§
Before commissioning the plant install all protective devices
against unintentional touching of free moving and/or rotating parts.
§To avoid sparks coverings in stainless steel should be used.
§The coverings must fulfil at least the protection type IP2X.
§The covering is to be so designed that it does not deposit dust onto
the coupling parts.
§The covering must not touch the coupling or influence it in its
functioning.
Pay attention during the operation of the coupling to:
§Changed running noises
§Occurring vibrations
Attention!
·If irregularities are found during operation of the coupling, the drive must be
immediately switched off.
·Detect according to the following table 7, “Operating faults and their possible causes” the
faults and remove.
The listed faults are some examples which are supposed to facilitate fault location.
·For fault finding and elimination all machine components and operating states are
to be considered!
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Table 7 Operating faults and their possible causes:
Trouble
Cause
Risk Warning
Correction
Irregular
running
noises/
vibrations
Alignment fault Considerable
increase in
coupling tempera-
ture. Premature
wear of elastic
buffers. Increased
reaction forces act
on connected
machines.
-Disconnect drive
-Remove cause for alignment fault
-Re-align coupling
-Inspect elastomer for wear
Elastomer
worn out
Coupling claws
strike against
each other. Spark
formation, claw
fracture, in-
creased reaction
forces.
-Disconnect drive
-Check coupling components for
damages and replace parts, if nec-
essary
-Replace elastomer
Unbalance Considerable
increase in
coupling tempera-
ture. Premature
wear of elastic
buffers. Increased
reaction forces act
on connected
machines
-Disconnect drive
-Verify balance state of plant compo-
nents and correct it, if necessary
-Inspect elastomer for wear
Loose
screw
connec-
tions
Flying off parts
can cause serious
injuries and
considerable
damages.
-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
Premature
wear of
elastomer
Alignment fault Considerable
increase in
coupling tempera-
ture. Increased
reaction forces act
on connected
machines.
-Disconnect drive
-Remove cause for
alignment fault
-Re-align coupling
-Inspect elastomer for wear
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Trouble
Cause
Risk Warning
Correction
Unaccept-
able
tempera-
tures
Material proper-
ties of elastic
buffers change.
The torque
transmission
capability is
adversely af-
fected.
-Disconnect drive
-Replace elastomer
-Re-align coupling
-Adjust ambient temperature
Contact
with
aggressive
products
Material proper-
ties of elastic
buffers change.
The torque
transmission
capability is
adversely af-
fected.
-Disconnect drive
-Check coupling parts for damages
and replace parts, if necessary
-Replace elastomer
-Verify alignment of coupling
-Prevent contact with aggressive
products
Torsional
vibrations
in the drive
line
Considerable
increase in
coupling tempera-
ture. Premature
wear of elastic
buffers. Increased
reaction forces act
on connected
machines.
-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 even-
tual use of another Shore-hardness
-Verify coupling alignment
Claw break-
age
Wear limit
of elas-
tomer
exceeded
===>
contact of
claws
Coupling is
destroyed.
Connected
machines can be
affected, too.
-Disconnect drive
-Replace coupling
-Inspect the elastomer for wear at
shorter intervals
Overload
due to too
high torque
Coupling is
destroyed.
Connected
machines can be
affected, too.
-Disconnect drive
-Verify coupling design in coopera-
tion with RINGFEDER POWER
TRANSMISSION
-Replace coupling
-Install larger coupling, if necessary
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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9.1 Check of Direction of Rotation
§
Injury danger!
§Switch-off the drive before all work on the coupling!
§Secure the drive against unintentional switching on and rotating!
§Due to incorrectly screwed on screws, parts can fly away and
cause person and material damage!
§Check before commissioning the coupling the alignment and all
screw fixings for their specified tightening torque and/or firm seat-
ing!
§
Before commissioning the plant all protective devices against
unintentional touching of free moving and/or rotating parts must be
installed.
§To avoid sparks coverings should be made of stainless steel!
§The coverings must fulfil at least the protection type IP2X.
§The covering is to be designed in such a way that it does not
deposit dust onto the coupling parts.
§The covering must not touch the coupling and/or influence it in its
function.
·Remove the fixing screws on the
claw ring and push it back (Figure 9,
Pos. 1).
·Secure the claw ring against uninten-
tional displacement.
·Cut through the intermediate ring at a
connecting part (Figure 9, pos. 2).
·Pull out the intermediate ring. Start at
the cut through connecting part.
·
Attention!
·Make sure, that the coupling halves can not move axially during the
sense of rotation test.
·The coupling half with the pulled back claw ring must remain
stationary during the sense of rotation test.
·The rotating half must not touch the stationary half!
·Check the direction of rotation.
·Cut through a new intermediate ring at a connecting part and fit it between coupling hub
and flange.
·To obtain an easier mounting one can provide the new elastic intermediate ring with a slip
additive before its introduction (e.g. talcum powder).
Fig. 9
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Attention!
The bearing surface of the claw ring and flange hub must be clean, dry and grease-
free. Balanced parts are position marked to each other.
·Mount the claw ring in its marked position with
respect to the hub. Pay attention that the join-
ing parts do not tilt on the centring seat and to
the position of the abrasive marking. (see
chapter 10).
·Slightly tighten the screws uniformly.
·Tighten the claw ring threaded joint with the
tightening torque MA stipulated in table 8 (Fig-
ure 10).
·Check the alignment of the coupling according
to the specifications in „8 Coupling adjust-
ment”.
Table 8 Tightening torques MAof the claw ring threaded joint:
Size 112 128 148 168 194 214 240 265 295 330 370 415
DIN 912- 8.8 M8 M8 M10 M10 M10
DIN 912-10.9 M12 M12 M14 M14 M16 M16 M16
M
A
[Nm] 25 25 49 49 49 125 125 200 200 310 310 310
Fig. 10
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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10 Maintenance
The elastic coupling RINGFEDER® TNM GBT, TNM GTW have in operation a low-
maintenance. Reaching the wear limit of the elastic intermediate ring depends on the
operating parameters and the conditions of use.
In the case of routine monitoring work on the plant check:
·Alignment of the coupling
·Elastomer state
·Remove dust deposits from the coupling parts and the intermediate 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 switching on and rotating!
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 7 “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.
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1

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Fig. 11 Buffer thickness
10.2 Wear limit of elastic buffers
Replace the elastic buffer ring as soon as the
coupling has a distinct torsional backlash, or if
the minimum buffer thickness (PDmin, Fig. 11)
acc. to table 9 has been reached.
Table 9 Minimum buffer thickness PDmin:
Size 112 128 148 168 194 214 240 265 295 330 370 415
PD
min
[mm] 9 9 10 10 10 10 11 12 13 14 16 17
RINGFEDER® TNM GBT, TNM GTW
BAWN 006-GBR-1