Couplings

Couplings
REX ® THOMAS ® FLEXIBLE DISC COUPLINGS
SPACER TYPE SERIES 52
Series 52 couplings are all purpose high speed, high torque couplings used where minimum coupling weight is desirable. They are commonly
used on motor and turbine driven pumps, compressors and fans. Design modifications may be made to further reduce the coupling weight,
making it an economic alternative to high performance disc and diaphragm couplings.
Construction
Hubs and Center Assembly: Carbon Steel
Bolts: Alloy Steel
Disc Packs: Tomaloy Tpack (225-750 Size)
Coatings Available: Black Oxide, Zinc, Cadmium
When Specified, Series 52 couplings meet all requirements of API 610, or API 671.
If application requires API specification, please consult Rexnord Industries, Inc.
General Dimensions (inch)
Coupling ➅ Max.
➁ Std.
➁ Stocked
Min.
Size Bore
A B C C C F G N
125
1.38
3.69
1.31
4.00
4 – 6.63
2.06
0.27
162
1.88
4.34
1.75
5.00
5 2.03
8.50
2.75
0.29
200
2.25
5.44
2.06
5.00
5 2.63
9.13
3.28
0.36
225
2.63
5.69
2.63
5.00
5 & 7 2.75
10.25
3.78
0.36
262
3.13
6.62
2.88
5.00
5 & 7 3.22
10.75
4.50
0.47
312
3.63
7.81
3.38
5.50
5.5
& 7 3.75
12.25
5.25
0.50
350
4.00
8.69
3.75
6.00
6 & 7 4.16
13.50
5.88
0.54
375
4.50
9.69
4.00
7.00
7 4.59
15.00
6.50
0.59
425
4.75
10.50
4.25
7.00
7 4.94
15.50
7.00
0.62
450
5.13
11.31
4.50
8.00
7 & 8 5.34
17.00
7.44
0.71
500
5.38
12.88
5.00
9.00
9 6.03
19.00
8.38
0.78
550
6.00
14.44
5.50
10.00
10
6.88
21.00
9.44
0.91
600
6.50
16.00
6.00
10.00
10
7.50
22.00
10.25
0.98
700
7.50
18.25
7.00
11.00
– 8.56
25.00
11.75
1.20
750
8.00
19.81
7.50
11.00
– 9.25
26.00
12.63
1.27
800
8.75
21.50
8.25
12.00
– 10.02
28.50
13.62
1.34
850
9.25
23.00
8.75
13.00
– 10.75
30.50
14.50
1.40
925
10.12
25.00
9.50
14.00
– 11.50
33.00
15.75
1.50
1000
11.00
27.50
10.50
14.50
– – 35.50
17.25
1.69
1100
12.00
29.19
11.25
16.00
– – 38.50
18.50
1.75
1200
13.00
32.12
12.25
17.00
– – 41.50
20.25
1.97
1300
14.00
34.50
13.25
18.00
– – 44.50
21.88
2.03
Other materials such as Stainless Steel, Monel
and Inconel are available; please consult
Rexnord Industries, Inc.
Misalignment: 1 /3° per disc pack
**INCREASED TORQUE RATINGS**
Series 52
Engineering Data
Max Horsepower
Weight
Per
100 RPM ➂ Maximum
RPM
Maximum
Peak
Change
WR
2 ➀
➄ Continuous Overload ➃ Per inch ➃ Change Per
Axial
Coupling Service Factor Not
Torque Torque W eight
of “C” WR
2
Inch of “C” Capacity
Size
1 Balanced
Balanced
(lb.-in.) (lb.-in.) ( lb. ) (lb.) ( lb.-in. 2
) ( lb.-in. 2
) (in.)
125
4.28
5,000
15,000
2,700
5,400
4.
6 0.16
7.
4 0.15
±0.036
162
8.49
4,600
15,000
5,350
10,700
7.
2 0.21
15.
8 0.27
±0.036
200
16.
7 4,250
15,000
10,500
21,000
12.
4 0.25
43.
7 0.58
±0.036
225
27.
8 4,100
14,000
17,500
35,000
16.
0 0.35
61
0.85
±0.036
262
52.
1 3,900
13,000
32,830
65,660
26.
0 0.50
137
1.
6 ±0.043
312
81.
6 3,450
11,700
51,400
102,800
41.
4 0.66
300
3.
1 ±0.051
350
106
3,200
10,500
66,900
133,800
58.
6 0.83
528
4.
8 ±0.056
375
159
3,000
9,400
100,300
200,600
80.
0 1.03
909
7.
2 ±0.062
425
213
2,800
8,700
134,300
268,600
104.
0 1.43
1,380
11.
7 ±0.067
450
239
2,700
8,100
150,400
300,800
127
1.44
1,970
13.
5 ±0.072
500
391
2,500
7,100
246,400
492,800
196
2.30
3,800
27.
2 ±0.082
550
524
2,300
6,300
330,400
660,800
281
2.90
6,900
43.
0 ±0.092
600
688
2,150
5,700
433,800
867,600
370
3.30
11,200
61.
2 ±0.102
700
1,071
1,950
5,000
674,800
1,349,600
567
4.60
22,300
103.
0 ±0.115
750
1,331
1,850
4,600
838,800
1,677,600
712
5.20
33,100
143.
0 ±0.125
800
1,712
1,750
4,300
1,078,700
2,157,400
911
6.00
51,450
200.
0 ±0.136
850
2,020
1,600
3,900
1,273,000
2,546,000
1,109
6.00
71,700
200.
0 ±0.144
925
2,735
1,500
3,600
1,724,000
3,448,000
1,459
8.00
111,40
0 400.
0 ±0.156
1000
3 ,094
– 3,250
1,950,000
3,900,000
1,880
9.00
171,900
506.
0 ±0.172
1100
3 ,689
– 3,100
2,325,000
4,650,000
2,250
11.00
235,500
794.
0 ±0.183
1200
4 ,498
– 2,800
2,835,000
5,670,000
3,010
15.00
376,500
1,196.
0 ±0.203
1300
5 ,379
– 2,600
3,390,000
6,780,000
3,660
15.00
523,700
1,350.
0 ±0.218
➀ All Thomas disc couplings meet NEMA frame sleeve bearing motor specifications without modification or the addition of end-float restricting devices .
➁ Additional “C” dimensions available. Consult Rexnord .
➂ Series 52 couplings meet AGMA Class 9 balance requirements as manufactured with interference fit bore and close fit keyway. If clearance fit
and/or
setscrews are required, please consult Rexnord. Seep age 7for
explanation of RPM limits and balancing recommendations .
➃ Weight
and WR2 at maximum bore and standard “C” dimension listed .
➄ Balance recommendations based on AGMA Specification 9000-C90 Average Sensitivity .
➅ Consult Rexnord for minimum rough bore sizes .
Note: Dimensions subject to change. Certified dimensions of ordered material furnished on request. 17
A
G
B
N
Series 52
TAPER BORES ALSO AVAILABLE
C
F
B