Thomas ® Series 71

Thomas ® Series 71 - 8
Precision. Power. Performance.
Rexnord ® Thomas ® Disc Couplings
Series 71 - 8
You want a trusted name when it comes to providing engineered
power transmission products that improve productivity and efficiency.
Rexnord provides superior products for your industrial applications
world wide. We work closely with you to reduce maintenance costs,
eliminate redundant inventories and prevent equipment downtime.
Spacer style flexible metallic disc coupling designed for your pump
and compressor applications. The simple three piece design and
piloted center member provide fast installation and repeatable balance significantly reducing your installation and service time.
Applications include:
-
pumps
compressors
general purpose machinery
ATEX Certified II 2G c T5
Thomas ® Series 71 - 8
Features
Benefits
Unitized and piloted
centermember
Ease of installation;
repeatable balance
Meets API specifications
Oversize bore capacity
Ease of installation
Meets API specifications high
misalignment and axial capacity
Bolt on hubs
Jacking bolt feature
Stainless Steel discs &
8 bolt design standard
A G
MAX.
BORE
STANDARD
HUB
C
B
Coupling
SIZE
225
262
312
350
375
425
450
500
550
600
E
MIN.
EXTENDED
HUB
B1
•
•
•
•
Max. RPM
MAX.
BORE
B2
Stocked „C“ Dimensions
140
180
250
•
•
LARGE
HUB
•
•
•
•
•
•
•
B & B1 Hub B2 Hub
Max. Bore Max.
80
95
112
130
144
158
170
196
215
242
Coupling
Size
Max. RPM
Not
Balanced
Balanced
(Nm)
225
262
312
350
375
425
450
500
550
600
7 500
6 800
6 200
5 700
5 200
5 000
4 700
4 200
3 900
3 600
14 000
12 500
11 500
10 500
9 800
9 300
8 700
7 900
7 300
6 800
1 976
3 706
5 803
7 552
11 323
15 161
16 979
27 817
37 300
48 973
106
128
145
166
185
203
214
248
A
B
B1
B2
Min. C
Max. E
G
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
151.64
174.75
203.20
227.08
252.48
273.05
293.62
333.25
373.13
416.05
63.50
77.72
90.42
98.55
112.78
123.95
128.52
150.88
166.62
182.63
79.25
93.73
109.47
120.65
134.87
149.35
157.23
179.32
198.37
214.38
77.72
90.42
104.65
114.30
131.06
139.70
152.40
171.45
0.00
0.00
120.65
139.70
152.40
171.45
184.15
190.50
222.25
260.35
292.10
317.50
106.43
119.13
146.05
165.10
181.10
188.98
212.85
231.90
254.00
298.45
115.82
131.83
160.27
179.32
201.68
214.38
235.71
266.70
292.10
335.79
Weight
Weight
Change Per
WR2
WR2 Change
Per mm of „C“
(Nm)
(Kg)
mm of „C“ (Kg)
(kgm2)
(kgm2/mm)
(mm)
3 951
7 413
11 605
15 105
22 646
30 323
33 958
55 633
74 599
97 945
12.62
19.52
30.42
43.13
60.84
76.73
99.88
154.81
215.65
296.46
0.0068
0.0082
0.0098
0.0134
0.0188
0.0218
0.0284
0.0379
0.0474
0.0545
0.0375
0.0775
0.1697
0.3017
0.5220
0.7654
1.1763
2.3525
4.0759
7.0604
1.233E-05
2.246E-05
3.848E-05
6.486E-05
1.063E-04
1.451E-04
2.074E-04
3.617E-04
5.737E-04
7.960E-04
±0.9144
±1.0922
±0.1.2954
±1.4224
±1.5748
±1.7018
±1.8288
±2.028
±2.3368
±2.5908
Max. Continuous Peak Overload
Torque
Torque
Axial
Capacity
REXNORD NV, Belgium
Dellingstraat 55
2800 Mechelen
Phone: +32 / 70 22 33 66
Fax: +32 / 70 22 33 67
E-mail: Customerservice.Belgium@rexnord.com
www.rexnord.eu
P50-002-EN-1
Contact
Ex II 2GD T5
Precision, Power, Performance.
You want a trusted name when it comes to providing
engineered power transmission products that improve
productivity and efficiency. Rexnord provides superior
products for your industrial applications world wide. We
work closely with you to reduce maintenance costs,
eliminate redundant inventories and prevent equipment
downtime.
Thomas SR71
Thomas flexible Disc couplings are non-lubricated, metal
flexing couplings, utilising non-wearing components for the
transmission of torque and the accommodation of unavoidable
shaft misalignment.
Rexnord Thomas SR 71 Spacer style flexible metallic disc
coupling designed for your pump applications. The simple
three piece design and piloted center member provide fast
installation and repeatable balance significantly reducing your
installation and service time.
Features
Benefits
Unitized and piloted
centermember
Ease of installation;
repeatable balance
Meets API specifications
Oversize bore capacity
Ease of installation
Meets API specifications with
high misalignment and axial
capacity
Bolt on hubs
Jacking bolt feature
Stainless Steel discs
standard
Applications include:
Pumps
General propose machinery
Torque
Demands
Driven machine
SR71
Typical application for electirc
motor or turbine driven
equipment
Typical
Service
Factor
Constant torque such as
Centrifugal Pumps,
Blowers, and
Compressors
1,0
Continuous duty some
torque variations including
Plastic Exruders, Forced
Draft Fans.
1,5
Light shick loads from
Metal Extruders, Cooling
Towers, Log Haul
2,0
Modernate shock loading
as expected Stone
Crusher, Vibrating Screen
2,5
Consult
Rexnord
Engineering
Heavy shock load with
somenegative torques
from Reciprocating
Pumps, Compressors
SR71
Coupling
SIZE
Tn
Nm
n max
min-1
D1 / D2
max
mm
D3
max
mm
A
mm
E
mm
L
mm
L2
mm
L3
mm
N
mm
Q
max
mm
J
kgm
#J
kgm / m
m
kg
#m
Change
kg / m
150
175
225
300
350
375
412
462
512
562
600
105
185
350
820
1520
2200
2540
4570
6220
9500
10400
9000
9300
7700
6800
6200
5650
5350
5000
4700
4350
4150
38
50
58
80
95
100
110
130
140
155
165
64
73
87
110
120
137
145
166
187
200
220
91
106
125
152
171
194
203
229
255
279
298
12,3
12,6
12,3
15,1
17,3
17,5
21,6
23,6
23,6
25,9
31,2
33
40
51
67
79
83
92
105
114
127
133
43
52
64
83
95
102
111
127
137
152
162
41
46
52
70
76
83
92
105
114
127
133
59
72
85
113
134
144
155
174
194
215
223
52
65
79
105
127
135
146
160
179
195
211
0,0032
0,006
0,012
0,036
0,076
0,125
0,180
0,328
0,540
0,890
1,250
0,0004
0,0010
0,0030
0,0070
0,0136
0,0187
0,0334
0,0536
0,856
0,120
0,202
3,1
4,2
6,2
12
19
25
32
46
61
84
104
1,7
2,5
3,4
4,6
7,5
7,7
10,7
14,3
18,5
22,9
31,3
*weight and inertia on maximum bore and minimum c
D.B.S.E. Combinations for ISO and ANSI pumps
Coupling
SIZE
B
min
mm
C
min
mm
150
175
225
300
350
375
412
462
512
562
600
154
166
189
235
283
292
400
387
406
445
495
87
87
87
102
124
127
156
178
178
191
229
100
167
179
202
ISO D.B.S.E. (mm)
140
180
250
207
219
242
273
299
305
247
259
282
313
339
345
424
389
408
317
329
352
383
409
415
494
459
478
504
516
300
Dimension ”B” coupling overall length (mm)
Ansi D.B.S.E. (in)
400
3,5
4,375
5
5,5
7
367
379
402
433
459
465
544
509
528
554
566
467
479
502
533
559
565
644
609
628
654
666
156
168
191
178
191
213
245
194
206
229
260
286
292
206
219
241
273
298
305
244
257
279
311
336
343
422
387
406
7,5
8
9
257
270
292
324
349
356
434
400
419
445
270
283
305
337
362
368
447
412
432
457
295
308
330
362
387
394
473
438
457
483
495
Thomas ® SR 54 RDG
Precision. Power. Performance.
Rexnord ® Thomas ® Series
54 RDG Coupling
You want a trusted name when it comes to providing engineered
power transmission products that improve productivity and efficiency.
Rexnord provides superior products for your industrial applications
world wide. We work closely with you to reduce maintenance costs,
eliminate redundant inventories and prevent equipment downtime.
Reduced diameter close coupled flexible metallic disc coupling
with high power density. The split piloted center member design
provides high speed and torque ratings while permitting service of
the coupling with out moving the hubs or connected equipment.
Applications include:
-
pumps
compressors
general purpose machinery
paper machines
Thomas 54RDG Coupling Offset .indd 1
ATEX Certified II 2G c T5
12.09.2007 09:58:33
Thomas ® SR 54 RDG
Features
Benefits
Axially split design
Ease of installation
Close coupled
Meets API 610 10th edition
when specified
High torque capacity
High speed capacity
Corrosion resistant
Meets API when specified
Piloted split center spool
Stainless Steel
Discs standard
Max. RPM(1)
SIZE
125
162
200
225
262
312
350
375
425
450
500
550
600
Not
Balanced Balanced
4.600
4.200
3.800
3.700
3.600
3.000
2.800
2.500
2.300
2.200
2.000
1.900
1.800
54RDG Max Peak
Continuous Overload Weight(2)
Torque
Torque Weight(2)
10.500
9.700
8.600
8.400
7.400
6.700
6.200
4.800
5.400
5.000
4.600
4.200
3.900
125
162
200
225
262
312
350
375
425
450
500
550
600
C1
C2
H
MAX.
BORE
INTERNAL
G
N
B
F
F1
F2
WR(2)
WR2
Axial
Capacity
(Nm.)
(Nm.)
(Kg.)
(Kgm2)
(mm)
305
604
1.185
1.976
3.706
5.803
7.552
11.323
15.161
16.979
27.817
37.300
48.973
610
1.208
2.371
3.951
7.413
11.605
15.105
22.646
30.323
33.958
55.633
74.599
97.945
3.1
4.2
7.3
8.6
14.1
20.9
30.0
40.0
53.1
69.9
101.7
147.1
198.4
0.0037
0.0070
0.0196
0.0249
0.0562
0.1124
0.2016
0.3394
0.5208
0.7871
1.4542
2.6246
4.3597
±0.91
±0.91
±0.91
±0.91
±1.09
±1.29
±1.42
±1.57
±1.70
±1.82
±2.02
±2.33
±2.59
Torque Demands
Driven Machine
Larger sizes to 194.600 Nm MCT available upon request
(1) Contact Rexnord for explanation of RPM limits and balancing recommendations
(2) Weight and WR2 with standard length hubs, maximum bore and standard C
SIZE
C
MAX.
BORE
EXTERNAL
A
Typical Application for Electric Motor
or Turbine Driven Equipment
Typical Service
Factor
Constant torque such as centrifugal pumps
blowers and compressors
1.0
Continuous duty with some torque variations
including plastic extruders and forced
draft fans
1.5
Light shock loads from metal extruders,
cooling towers and log haulers
2.0
Moderate shock loading as expected from a
car dumper, stone crusher, vibrating screen
2.5
Heavy shock load with some negative torques
from reciprocating pumps, compressors,
reversing turnout tables
3.0
Frequent torque reversals such as reciprocating compressors with frequent torque
reversals which do not necessarily include
reverse rotations
Consult Rexnord
Engineering
Max Bore* Max Bore*
A
B
C
C1**
F
F1**
H
N
G
C2***
F2***
Internal (mm) External (mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
97
114
141
149
175
199
223
247
267
287
327
367
406
48
48
54
56
66
72
83
90
101
114
121
136
152
3.0
3.0
3.0
3.0
4.8
4.8
6.4
6.4
6.4
7.9
7.9
9.7
9.7
44.5
45.0
49.8
51.6
61.5
66.5
77.7
82.8
91.7
105.4
109.7
123.7
137.2
99
99
111
114
136
149
173
187
208
236
251
282
314
125
137
156
174
200
225
256
275
300
334
358
400
442
4.3
4.3
5.6
5.6
6.4
7.6
8.6
9.9
10.7
11.9
12.7
14.7
17.0
6.9
7.4
9.1
9.1
11.9
12.7
13.7
15.0
15.7
18.0
19.8
23.1
24.9
44
59
83
89
105
127
140
154
167
178
200
222
236
85.9
86.9
96.5
100.1
118.1
128.3
149.1
159.3
177.0
202.9
211.6
237.7
264.7
152.4
175.8
201.2
233.2
264.4
300.0
339.6
362.5
392.9
431.5
465.6
517.1
569.5
30
42
58
64
73
93
100
112
120
130
137
150
166
34
50
58
70
84
97
110
120
130
140
146
166
176
* Non-bored hubs available upon request. **One internal and one external hub. ***Two external hubs.
REXNORD NV, Belgium
Dellingstraat 55
2800 Mechelen
Phone: +32 / 70 22 33 66
Fax: +32 / 70 22 33 67
E-mail: Customerservice.Belgium@rexnord.com
www.rexnord.eu
Thomas 54RDG Coupling Offset .indd 2
P50-001-EN-1
Contact
12.09.2007 09:58:53