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REX ® THOMAS ® SINGLE-FLEXING DISC COUPLINGS<br />
<strong>Couplings</strong><br />
TYPE SN SINGLE<br />
Type SN single couplings are used for floating shaft applications where the user wishes to supply his own intermediate solid shaft, or for<br />
single-flexing applications where light-to-moderate radial loads occur. They are generally more economical than ST couplings.<br />
Construction<br />
Other materials such as Stainless Steel, Monel<br />
Hubs: Carbon Steel<br />
and Inconel are available; please consult<br />
Bolts: Alloy Steel<br />
Rexnord Industries, Inc.<br />
Disc Packs: Tomaloy Tpack<br />
Misalignment: 1 /3° per disc pack<br />
Coatings Available: Black Oxide, Zinc, Cadmium<br />
Note:<br />
Single-flexing couplings cannot accommodate parallel<br />
misalignment. They are not suitable for connecting equipment<br />
where both shafts are held rigidly in their own bearings.<br />
General Dimensions (inch)<br />
Coupling ➀<br />
Size Max<br />
Bore<br />
A B F G N<br />
100<br />
1.16<br />
3.22<br />
1.38<br />
3.21<br />
1.69<br />
0.45<br />
125<br />
1.38<br />
3.84<br />
1.63<br />
3.78<br />
2.06<br />
0.52<br />
162<br />
1.88<br />
4.47<br />
1.88<br />
4.30<br />
2.75<br />
0.54<br />
200<br />
2.25<br />
5.44<br />
2.13<br />
4.83<br />
3.28<br />
0.57<br />
226<br />
2.63<br />
5.81<br />
2.63<br />
5.84<br />
3.78<br />
0.58<br />
262<br />
3.13<br />
6.69<br />
3.00<br />
6.47<br />
4.50<br />
0.47<br />
312<br />
3.63<br />
7.81<br />
3.38<br />
7.26<br />
5.25<br />
0.50<br />
350<br />
4.00<br />
8.75<br />
3.75<br />
8.04<br />
5.88<br />
0.54<br />
375<br />
4.50<br />
9.69<br />
4.00<br />
8.59<br />
6.50<br />
0.59<br />
425<br />
4.75<br />
10.50<br />
4.25<br />
9.12<br />
7.00<br />
0.62<br />
450<br />
5.13<br />
11.31<br />
4.50<br />
9.78<br />
7.44<br />
0.78<br />
500T<br />
5.38<br />
12.88<br />
5.00<br />
10.78<br />
8.38<br />
0.78<br />
550T<br />
6.00<br />
14.44<br />
5.50<br />
11.91<br />
9.44<br />
0.91<br />
600T<br />
6.50<br />
16.00<br />
6.00<br />
12.98<br />
10.25<br />
0.98<br />
700T<br />
7.50<br />
18.25<br />
7.00<br />
15.20<br />
11.75<br />
1.20<br />
750T<br />
8.00<br />
19.81<br />
7.50<br />
16.27<br />
12.63<br />
1.27<br />
A G<br />
TYPE SN SINGLE<br />
AXIAL<br />
CAPACITY<br />
➀<br />
B<br />
N<br />
F<br />
B<br />
Engineering Data<br />
Max Horsepower<br />
Per 100 RPM<br />
➁<br />
Max. Continuous Peak Overload ➂<br />
Axial<br />
Coupling Service Factor ➂<br />
Torque<br />
Torque W eight<br />
➂WR<br />
Capacity<br />
Size<br />
1<br />
Max. RPM (lb.-in.)<br />
(lb.-in.)<br />
(lb.)<br />
( lb.-in. 2<br />
)<br />
(in.)<br />
100<br />
1.<br />
3<br />
7,100<br />
820<br />
1,640<br />
2.<br />
3<br />
2.<br />
7 ±0.019<br />
125<br />
3.<br />
5<br />
6,500<br />
2,230<br />
4,460<br />
3.<br />
8<br />
6.<br />
5 ±0.023<br />
162<br />
7.<br />
1<br />
6,000<br />
4,450<br />
8,900<br />
5.<br />
8<br />
17.<br />
1 ±0.018<br />
200<br />
13.<br />
6<br />
5,500<br />
8,600<br />
17,200<br />
11<br />
37<br />
±0.018<br />
226<br />
22.<br />
6<br />
5,200<br />
14,260<br />
28,520<br />
14<br />
53<br />
±0.018<br />
262<br />
52.<br />
1<br />
4,800<br />
32,830<br />
65,660<br />
23<br />
117<br />
±0.022<br />
312<br />
81.<br />
6<br />
4,500<br />
51,400<br />
102,800<br />
37<br />
264<br />
±0.026<br />
350<br />
106<br />
4,100<br />
66,900<br />
133,800<br />
52<br />
459<br />
±0.028<br />
375<br />
159<br />
3,900<br />
100,300<br />
200,600<br />
71<br />
770<br />
±0.031<br />
425<br />
213<br />
3,700<br />
134,300<br />
268,600<br />
89<br />
1,160<br />
±0.034<br />
450<br />
239<br />
3,600<br />
150,400<br />
300,800<br />
121<br />
1,580<br />
±0.036<br />
500T<br />
391<br />
2,800<br />
246,400<br />
492,800<br />
150<br />
2860<br />
±0.041<br />
550T<br />
524<br />
2,500<br />
330,400<br />
660,800<br />
210<br />
5,130<br />
±0.046<br />
600T<br />
688<br />
2,300<br />
433,800<br />
867,600<br />
257<br />
7,010<br />
±0.051<br />
700T<br />
1,071<br />
2,000<br />
674,800<br />
1,349,600<br />
390<br />
12,100<br />
±0.057<br />
750T<br />
1,331<br />
1,800<br />
838,800<br />
1,677,600<br />
534<br />
24,650<br />
±0.062<br />
For larger sizes, consult Rexnord. For ordering instructions, see pages 10-11.<br />
➀ C onsult Rexnord for minimum rough bore on sizes 162-450.<br />
➁ All Thomas disc couplings meet NEMA frame sleeve bearing motor specifications without modification or the addition of end-float restricting devices .<br />
➂ Weight<br />
and WR2 at maximum bore.<br />
30<br />
Note: Dimensions subject to change. Certified dimensions of ordered material furnished on request.
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