JMII Single Diaphragm Coupling Without Counterbore

JMII metal diaphragm coupling also adopts the single-piece design but has no counterbore, suitable for short distance transmission, with more compact structure.

Model	Nominal Torque T_n N·m	Instantaneous Maximum Torque T_max N·m	Maximum Speed n_max r/min	Shaft Hole Diameter d,d₁ mm	Shaft Hole Length mm			D mm	D₁ mm	t mm	Torsional Stiffness ×10⁶ N·m/rad	Quality m kg	Rotational Inertia I kg·m²
					J₁ 型	Y 型	L_推荐
					L	L	L_推荐
JMII1	40	63	10700	14	27	32	35	80	39	8 ± 0.2	0.37	0.9	0.0005
				16,18,19	30	42
				20,22,24	38	52
				25,28	44	62
JMII2	63	100	9300	20,22,24	38	52	40	92	53		0.45	1.4	0.0011
				25,28	44	62
				30,32,35,38	60	82
JMII3	100	200	8400	25,28	44	62	45	102	63		0.56	2.1	0.002
				30,32,35,38	60	82
				40,42,45	84	112
JMII4	250	400	6700	30,32,35,38	60	82	55	128	77	11 ± 0.3	0.81	4.2	0.006
JMII4	250	400	6700	40,42,45,48,50,55	84	112	55	128	77		0.81	4.2	0.006
JMII5	500	800	5900	35,38	60	82	65	145	91		1.2	6.4	0.012
				40,42,45,48,50,55,56	84	112
				60,63,65	107	142
JMII6	800	1250	5100	40,42,45,48,50,55,56	84	112	75	168	105	14 ± 0.3	1.42	9.6	0.024
JMII6	800	1250	5100	60,63,65,70,71,75	107	142	75	168	105	14 ± 0.3	1.42	9.6	0.024
JMII7	1000	2000	4750	45,48,50,55,56	84	112	80	180	112	15 ± 0.4	1.9	12.5	0.0365
				60,63,65,70,71,75	107	142
				80	132	172
JMII8	1600	3150	4300	50,55,56	84	112		200	120		2.35	15.5	0.057
				60,63,65,70,71,75	107	142
				80,85	132	172
JMII9	2500	4000	4200	55,56	84	112		205		20 ± 0.4	2.7	16.5	0.065
				60,63,65,70,71,75	107	142
				80,85	132	172
JMII10	3150	5000	4000	55,56	84	112	90	215	128		3.02	19.5	0.083
				60,63,65,70,71,75	107	142
				80,85,90	132	172
JMII11	4000	6300	3650	60,63,65,70,71,75	107	142	100	235	132	23 ± 0.5	3.46	25	0.131
JMII11	4000	6300	3650	80,85,90,95	132	172		235	132		3.46	25	0.131
JMII12	5000	8000	3400	60,63,65,70,71,75	107	142		250	145		3.67	30	0.174
				80,85,90,95	132	172
				100	167	212
JMII13	6300	10000	3200	63,65,70,71,75	107	142	110	270	155		5.2	36	0.239
				80,85,90,95	132	172
				100,110	167	212
JMII14	8000	12500	2850	65,70,71,75	107	142	115	300	162	27 ± 0.6	7.8	45	0.38
				80,85,90,95	132	172
				100,110	167	212
JMII15	10000	16000	2700	70,71,75	107	142	125	320	176		8.43	55	0.5
				80,85,90,95	132	172
				100,110,120,125	167	212
JMII16	12500	20000	2450	75	107	142	140	350	186	32 ± 0.7	10.23	75	0.85
				80,85,90,95	132	172
				100,110,120,125	167	212
				130	202	252
JMII17	16000	25000	2300	80,85,90,95	132	172	145	370	203		10.97	85	1.1
				100,110,120,125	167	212
				130,140	202	252
JMII18	20000	31500	2150	90,95	132	172	165	400	230		13.07	115	1.65
				100,110,120,125	167	212
				130,140,150	202	252
				160	242	302
JMII19	25000	40000	1950	100,110,120,125	167	212	175	440	245	38 ± 0.9	14.26	150	2.69
				130,140,150	202	252
				160,170	242	302
JMII20	31500	50000	1850	110,120,125	167	212	185	460	260		22.13	170	3.28
				130,140,150	202	252
				160,170,180	242	302
JMII21	35500	56000	1800	120,125	167	212	200	480	280		23.7	200	4.28
				130,140,150	202	252
				160,170,180	242	302
				190,200	282	352
JMII22	40000	63000	1700	130,140,150	202	252	210	500	295		24.6	230	5.18
				160,170,180	242	302
				190,200	282	352
JMII23	50000	80000	1600	140,150	202	252	220	540	310	44 ± 1	29.71	275	7.7
				160,170,180	242	302
				190,200,220	282	352
JMII24	63000	100000	1450	150	202	252	240	600	335	50 ± 1.2	32.64	380	9.3
				160,170,180	242	302
				190,200,220	282	352
				240	330	410
JMII25	80000	125000	1400	160,170,180	242	302	255	620	350	50 ± 1.2	37.69	410	15.3
				190,200,220	282	352
				240,250	330	410
JMII26	90000	140000	1300	180	242	302	275	660	385		50.43	510	20.9
				190,200,220	282	352
				240,250,260	330	410
JMII27	112000	180000	1200	190,200,220	282	352	295	720	410	60 ± 1.4	71.51	620	32.4
				240,250,260	330	410
				280	380	470
JMII28	140000	200000	1150	220	282	352	300	740	420		93.37	680	36
				240,250,260	330	410
				280,300	380	470
JMII29	160000	224000	1100	240,250,260	330	410	320	770	450		114.53	780	43.9
JMII29	160000	224000	1100	280,300,320	380	470	320	770	450		114.53	780	43.9
JMII30	180000	280000	1050	250,260	330	410	350	820	490		130.76	950	60.5
				280,300,320	380	470
				340	450	550

JMII diaphragm coupling is a high-performance metal elastic element flexible coupling. The JMII type diaphragm coupling is mainly composed of several sets of diaphragms (stainless steel thin plates) connected to the two halves of the coupling in a staggered manner with bolts. Each set of diaphragms is composed of several stacked pieces. The diaphragm is divided into two types: linkage type and integral type with different shapes, which makes the coupling have good elasticity and deformation ability.

The JMII type diaphragm coupling compensates for the relative displacement of the two shafts connected by the elastic deformation of the diaphragm, without lubrication, compact structure, high strength, and long service life. At the same time, it also has the characteristics of no rotational clearance and is not affected by temperature and oil pollution, making it suitable for shaft transmission in high-temperature, high-speed, and corrosive medium working environments.

JMII shim pack couplings are widely used in shaft transmission of various mechanical devices, such as water pumps (especially high-power and chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopters), high-speed power transmission systems for ships, etc. After dynamic balancing, it is more suitable for high-speed transmission shaft systems.

Precautions for installation and disassembly

Before installation, check whether the two shafts are concentric, whether there are any debris or scratches on the surfaces of the two shafts and the inner holes of the half coupling, and clean them thoroughly.
During installation, the flange spacing error should be controlled within the range of 0-0.4mm, and the transmission accuracy should be ensured by detecting radial runout (≤ 0.05mm~0.08mm).
When disassembling and assembling, it should be done with the mechanical equipment stopped. First, disassemble and assemble in a straight line direction, and then use a wrench to adjust with force, taking care to avoid damaging the mechanical equipment.
When installing bolts, pay attention to the direction of the bolts and do not reverse or drop any small parts, including spring washers, to ensure that the bolt components perform well.

Performance advantages

High strength: JMII Flexible diaphragm coupling adopts stainless steel thin plate as the diaphragm material, which has high strength and stiffness.
Corrosion resistance: Due to the use of stainless steel material, the coupling has good acid and alkali corrosion resistance.
No noise: The coupling does not slide relative to each other during operation, so it does not require lubrication and runs smoothly without noise.
Easy maintenance: JMII diaphragm coupling has a simple structure, easy manufacturing, and basically no need for maintenance.

JMII Laminated Membrane coupling plays an important role in the field of mechanical transmission due to its unique structural characteristics, excellent working performance, and wide application areas.

URL: https://m.rokee.com/diaphragm-couplings/jmii-single-diaphragm-coupling-without-counterbore.html

Prev: JMIJ Double Diaphragm Coupling With Intermediate Shaft

Next: JMIIJ Double Diaphragm Coupling With Intermediate Shaft

You are here: Home > Industrial Couplings > Diaphragm Couplings > JMII Single Diaphragm Coupling Without Counterbore