High Performance Disc Couplings

Kop-Flex^® High Performance or High Speed Disc Couplings are available in four designs to accommodate all operating conditions and applications. In reduced moment with lowest overhung moment, RM provides interlocking (redundant) configuration. RZ allows lowest overhung moment at an economical price. Marine style - allows for installing and removing factory assembled center sections without removing the driving, or driven end, rigid hubs/adapters. MS offers the interlocking flanges, MP is the more economical option. The KS disc coupling is a sister to the Kop-Flex high-performance disc coupling. It is designed to meet API 671. It provides a less expensive alternative for applications with intermediate speed range.

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Features & Benefits:

All couplings are custom designed to meet the specific requirement of the application and OEM – Engineered drive solutions.
Meets API 671.
Balanced to the most stringent standards and quality in the Industry.
Various standard configurations and sizes available.
High Speed, High Power Machines.
Peak Torque capacity over 14.6 million lb-in (1647 kN-m).
Bore capacity exceeds 19 inches (480 mm).
Stainless Steel Koplon^™ Coated Flexible Discs for Maximum Life.
Unitized disc packs for ease of assembly and removal.
Heat Treated Alloy Steel Hubs, Spacers, and Sleeves.
RM (Reduced Moment) style has Lowest Moment Available on the Market.
Proven experience with application/experience list unmatched by anyone.
Options: Electrically insulated, shear section, back up or fail safe gears, various materials, and many more.

Additional Data

RM Series

Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in/lbs)	(5) Max. Momentary Torque Rating (in/lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (in.-in/rad x 10⁶)	Spacer Tube/in
										K (lb.-in x 10⁶) rad	Weight (lbs)	WR² (lb-in²)
										K (lb.-in x 10⁶) rad		WR² (lb-in²)
103	1.5	19	12000	19000	34300	12.6	20	1.74	0.36	9.8	0.23	0.24
153	2.0	48	30000	48000	28600	19.8	59.8	1.83	0.94	30.1	0.32	0.72
154	2.0	72	47000	75000	28600	23.6	80	1.85	0.99	30.1	0.32	0.72
203	2.5	88	56000	89000	23800	32.6	149	2.29	1.8	63.7	0.43	1.53
204	2.5	132	83000	132000	23800	36.3	178	2.31	1.9	63.7	0.43	1.53

253	3.0	135	85000	135000	19900	51.5	355	2.69	3	102	0.48	2.43
254	3.0	210	132000	210000	19900	55.5	388	2.71	3.1	102	0.48	2.43
303	3.5	219	138000	219000	17100	78.0	689	3.11	5.7	219	0.75	5.24
304	3.5	331	209000	332000	17100	86.0	808	3.14	6	219	0.75	5.24
353	4.0	353	216000	343000	14900	116	1370	3.50	9.2	383	1.00	9.18

354	4.0	517	326000	518000	14900	129	1620	3.53	10	383	1.00	9.18
355	4.0	647	407000	647000	12800	151	1960	3.50	11	475	1.26	11.4
403	4.5	501	315000	501000	13100	167	2570	3.85	14	637	1.33	15.3
404	4.5	750	473000	752000	13100	185	3020	3.89	15	637	1.33	15.3
405	4.5	938	591000	940000	11300	203	3350	3.83	15	790	1.67	18.9

453	5.0	660	416000	661000	11900	221	4030	4.43	20	980	1.67	23.5
454	5.0	1020	642000	1021000	11900	248	4760	4.40	23	980	1.67	23.5
455	5.0	1270	801000	1274000	10100	260	5000	4.37	23	1204	2.08	28.8
504	5.5	1290	813000	1293000	10900	297	7090	4.44	26	1300	1.83	31.2
505	5.5	1610	1016000	1615000	10900	313	7440	4.45	29	1740	2.5	41.6

554	6.0	1720	1082000	1720000	9900	438	12800	5.36	34	1880	2.23	44.9
555	6.0	2150	1354000	2153000	9900	448	13000	5.37	37	2440	2.96	58.4
604	6.5	2190	1379000	2193000	9200	518	17100	5.94	47	2620	2.67	62.7
605	6.5	2730	1724000	2741000	9200	543	17900	5.97	51	3330	3.45	79.6

RZ Series

Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in-lbs)	(5) Max. Momentary Torque Rating (in-lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (lb.-in/rad x10⁶)	Spacer Tube/in
Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in-lbs)	(5) Max. Momentary Torque Rating (in-lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (lb.-in/rad x10⁶)	K (lb-in x 10⁶) rad	Weight (lbs)	WR2 (lb-in²)
103	1.5	19	12000	19000	34300	13.6	21	1.51	0.36	9.8	0.23	0.24
153	2.0	48	30000	48000	28600	22.1	72.7	1.63	0.90	30.1	0.32	0.72
154	2.0	72	47000	75000	28600	23.6	77	1.57	0.98	30.1	0.32	0.72
203	2.5	88	56000	89000	23800	34.6	163	2.08	1.7	63.7	0.43	1.53
204	2.5	132	83000	132000	23800	35.3	167	2.07	1.8	63.7	0.43	1.53

253	3.0	135	85000	135000	19900	52.5	35.4	2.42	2.9	102	0.48	2.43
254	3.0	210	132000	210000	19900	53.3	363	2.42	3.0	102	0.48	2.43
303	3.5	219	138000	219000	17100	81.1	732	2.84	5.6	219	0.75	5.24
304	3.5	331	209000	332000	17100	82.5	755	2.84	5.8	219	0.75	5.24
353	4.0	343	216000	343000	14900	121	1460	3.19	8.9	383	1.00	9.18

354	4.0	517	326000	518000	14900	124	1500	3.19	9.2	383	1.00	9.18
355	4	647	407000	647000	12800	129	1540	3.07	9.7	475	1.26	11.40
403	4.5	501	315000	501000	13100	174	2720	3.48	13	637	1.33	15.3
404	4.5	750	473000	752000	13100	178	2790	3.48	14	637	1.33	15.3
405	4.5	938	591000	940000	11300	186	2870	3.36	15	790	1.67	18.9

453	5.0	660	416000	661000	11900	229	4260	4.07	19	980	1.67	23.5
454	5.0	1020	642000	1021000	11900	237	4330	4.06	20	980	1.67	23.5
455	5	1270	801000	1274000	10100	244	4500	3.97	21	1204	2.08	28.8
504	5.5	1290	813000	1293000	10900	283	6530	3.95	25	1300	1.83	31.2
505	5.5	1610	1016000	1615000	10900	301	6950	3.95	28	1740	2.50	41.6

554	6.0	1720	1082000	1720000	9900	403	11000	4.79	33	1880	2.23	44.9
555	6.0	2150	1354000	2153000	9900	424	11600	4.80	36	2440	2.96	58.4
604	6.5	2190	1379000	2193000	9200	491	15600	5.41	46	2620	2.67	62.7
605	6.5	2730	1724000	2741000	9200	516	16400	5.41	49	3330	3.45	79.6
704	8.0	4130	2603000	4139000	7500	880	42100	6.61	93	6100	4.05	146

705	8.0	5160	3253000	5172000	7500	920	44400	6.62	99	7790	5.28	187
804	9.0	6120	3852000	6125000	6600	1250	76000	7.18	130	10100	5.28	241

MS Series

Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in-lbs)	(5) Max. Momentary Torque Rating (in-lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (lb.-in/rad x10⁶)	Spacer Tube/in
Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in-lbs)	(5) Max. Momentary Torque Rating (in-lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (lb.-in/rad x10⁶)	K (lb-in x 10⁶) rad	Weight (lbs)	WR2 (lb-in²)
103	2.5	19	12000	19000	27700	18.8	52	0.13	0.52	12.1	0.21	0.29
153	3.5	48	30000	48000	23100	32.9	150	0.18	1.4	41.5	0.38	0.99
154	3.5	72	47000	75000	23100	34.7	134	0.18	1.7	41.5	0.38	0.99
203	4.0	88	56000	89000	20200	47.2	291	0.36	2.4	71.3	0.43	1.71
204	4.0	132	83000	132000	20200	47.5	293	0.36	2.6	71.3	0.43	1.71

253	5.0	135	85000	135000	16900	75.3	669	0.41	4.3	129	0.55	3.10
254	5.0	210	132000	210000	16900	76.2	678	0.41	4.8	129	0.55	3.10
303	6.0	219	138000	219000	14800	110	678	0.46	8.0	252	0.77	6.04
304	6.0	331	209000	332000	14800	112	1310	0.45	8.9	252	0.77	6.04
353	6.5	343	216000	343000	12800	164	2590	0.44	13	458	1.06	11.0

354	6.5	517	326000	518000	12800	167	2620	0.42	15	458	1.06	11.0
355	6.5	647	407000	647000	12800	166	2570	0.37	15	536	1.25	12.8
403	7.5	501	315000	501000	11300	235	4810	0.40	19	769	1.41	18.4
404	7.5	750	473000	752000	11300	238	4800	0.39	23	769	1.41	18.4
405	7.5	938	591000	940000	11300	235	4720	0.34	28	769	1.40	18.4

453	8.5	660	416000	661000	10100	317	7960	0.58	27	1190	1.78	28.5
454	8.5	1020	642000	1021000	10100	322	8080	0.56	33	1190	1.78	28.5
455	8.5	1270	801000	1274000	10100	336	8450	0.47	22	1190	1.80	28.5
504	9.0	1290	813000	1293000	9400	399	11600	0.76	37	1560	1.94	37.2
505	9.0	1610	1016000	1615000	9400	407	11500	0.71	41	1560	1.94	37.2

554	10.0	1720	1082000	1720000	8400	552	20200	0.66	49	2250	2.37	53.9
555	10.0	2150	1354000	2153000	8400	564	20100	0.61	54	2250	2.37	53.9
604	11.0	2190	1379000	2193000	7900	668	28000	0.83	72	3160	2.84	75.6
605	11.0	2730	1724000	2741000	7900	683	27900	0.78	77	3160	2.84	75.6

MP Series

Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in-lbs)	(5) Max. Momentary Torque Rating (in-lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (lb.-in/rad x10⁶)	Spacer Tube/in
Size	(1) Normal Bore Capacity (in)	(4) Max. Continuous Coupling Rating HP/100 RPM	(4) Max. Continuous Torque Rating (in-lbs)	(5) Max. Momentary Torque Rating (in-lbs)	Maximum Speed RPM	(6) Total Weight (lbs)	(6) Total WR² (in-lb²)	(6) Half Coupling C.G. (in)	(6) (7) Torsional Stiffness K (lb.-in/rad x10⁶)	K (lb-in x 10⁶) rad	Weight (lbs)	WR2 (lb-in²)
103	2.5	19	12000	19000	27700	18.5	52	0.13	-0.04	12.1	0.21	0.29
153	3.5	48	30000	48000	23100	33.3	154	0.18	0.01	41.5	0.38	0.99
154	3.5	72	47000	75000	23100	34.3	156	0.18	-0.01	41.5	0.38	0.99
203	4.0	88	56000	89000	20200	47.8	300	0.17	2.3	71.3	0.43	1.71
204	4.0	132	83000	132000	20200	48.5	304	0.14	2.6	71.3	0.43	1.71

253	5.0	135	85000	135000	16900	74.6	669	0.28	4.3	129	0.55	3.10
254	5.0	210	132000	210000	16900	75.5	679	0.25	4.7	129	0.55	3.10
303	6.0	219	138000	219000	14800	109	1290	0.31	7.9	252	0.77	6.04
304	6.0	331	209000	332000	14800	111	1320	0.28	8.8	252	0.77	6.04
353	6.5	343	216000	343000	12800	163	2590	0.26	13	458	1.06	11.0

354	6.5	517	326000	518000	12800	166	2640	0.22	14	458	1.06	11.0
355	6.5	647	407000	647000	12800	169	2670	0.16	15	458	1.06	11.0
403	7.5	501	315000	501000	11300	233	4730	0.23	19	769	1.41	18.4
404	7.5	750	473000	752000	11300	236	4800	0.19	21	769	1.41	18.4
405	7.5	938	591000	940000	11300	240	4840	0.12	24	769	1.41	18.4

453	8.5	660	416000	661000	10100	314	7940	0.44	27	1190	1.78	28.5
454	8.5	1020	642000	1021000	10100	318	8050	0.40	31	1190	1.78	28.5
455	8.5	1270	801000	1274000	10100	320	8050	0.35	29	1190	1.78	28.5
504	9.0	1290	813000	1293000	9400	392	11500	0.56	37	1560	1.94	37.2
505	9.0	1610	1016000	1615000	9400	399	11700	0.50	40	1560	1.94	37.2

554	10.0	1720	1082000	1720000	8400	554	20100	0.41	49	2250	2.37	53.9
555	10.0	2150	1354000	2153000	8400	553	20500	0.35	53	2250	2.37	53.9
604	11.0	2190	1379000	2193000	7900	655	27700	0.62	70	3160	2.84	75.6
605	11.0	2730	1724000	2741000	7900	666	28200	0.55	76	3160	2.84	75.6
655	12.0	3640	2293000	3656000	7000	877	44000	0.33	82	5035	3.60	121

704	13.0	4130	2603000	4139000	6500	1130	69400	0.65	150	7120	4.19	171
705	13.0	5160	3253000	5172000	6500	1150	71100	0.57	160	7120	4.19	171
755	14.0	5810	3663000	5824000	6300	1320	95300	0.46	206	10120	5.10	242
804	14.5	6120	3852000	6125000	6100	1590	140000	0.60	210	11100	5.16	266
805	14.5	7640	4814000	7654000	5900	1650	145000	0.42	250	13443	6.33	322

905	15.0	10330	6516000	10360000	5200	2050	185000	0.76	300	30193	8.64	484
(4) 1006	18.0	16440	10361000	18240000	4700	3760	501700	0.03	595	36055	11.0	863
(4) 1106	20.0	23800	15000000	26400000	3000	4950	795000	1.07	830	63830	17.0	1530

KS Series

Size	Max.¹ Continuous Rating HP/100 RPM	Max.¹ Torque Rating		Maximum Speed RPM	Max. Bore (in)	Total² Weight (lbs)	Total² WR² (in-lb²)	Total Stiffness K (lb.-in/rad x 10⁴)	Spacer Tube/in			Size
Size	Max.¹ Continuous Rating HP/100 RPM	Continuous (in-lb)	Peak (in-lb)	Maximum Speed RPM	Max. Bore (in)	Total² Weight (lbs)	Total² WR² (in-lb²)	Total Stiffness K (lb.-in/rad x 10⁴)	K (lb-in/rad x 10⁴)	Weight (lbs)	WR² (lb-in)	Size
103	9.5	6000	8000	14200	2.88	22.0	61	0.3	11.2	.24	.27	103
153	32.4	20400	27200	12500	3.88	41.1	187	1.1	33.4	.40	.80	153
204	85.7	54000	72000	11100	4.63	69.1	420	2.8	111	.80	2.66	204
254	124	78000	104000	9900	5.50	99.8	893	4.2	180	.78	4.30	254
304	212	133500	178000	8700	6.50	152	1770	8.0	336	1.17	8.06	304

354	357	225000	300000	7500	7.50	240	3730	14	709	1.96	17.0	354
404	512	322500	430000	6600	9.00	344	6830	21	1020	2.21	24.3	404
454	607	383000	510000	6000	9.75	455	11400	27	1550	2.54	37.0	454
504	857	540000	720000	5600	10.75	576	16600	38	2650	3.67	62.6	504
554	1200	758000	1010000	4800	12.00	792	28400	50	3120	3.89	74.7	554

604	1570	990000	1320000	4600	13.00	992	40700	69	4800	5.21	115	604
705	3590	2265000	3020000	3860	15.75	1690	102000	160	12700	9.43	304	705
805	5500	3465000	4620000	3450	18.00	2440	18500	240	21200	12.6	507	805
905	6190	3900000	5200000	3100	20.00	3180	304000	300	27500	11.7	658	905

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