High Quality Hydraulic Motor

 

First, the working principle of hydraulic motor

A hydraulic motor converts pressurized fluid from a pump into rotational motion. Oil flows through a control valve into the motor, where it pushes against pistons or gears to drive the output shaft.

 

Motors and pumps share similar designs and operating principles, but energy losses from internal friction and fluid resistance mean actual output speed always falls short of theoretical values.

 

Performance depends on motor size, pump displacement, and overall system efficiency. An undersized motor limits speed and torque, while restrictive lines or valves cause pressure drops that reduce output.

 

Choosing the right pump-motor combination requires matching capacities and accounting for real-world losses, which is why system design involves careful calculation and testing.

 

Two, how to rotate the hydraulic motor

 

Hydraulic motors operate on a pretty straightforward principle: pressurized fluid does the heavy lifting. Inside the motor, you've got two distinct zones-a high-pressure side and a low-pressure side. When oil from the pump rushes into the high-pressure chamber, it pushes against the gears or pistons, forcing them toward the low-pressure area. That movement is what spins the shaft. It's essentially a closed-loop system where the pump generates flow, and the motor turns that flow into rotational force, thanks to the mechanical action of its internal components and the inherent resistance of the fluid itself.

 

What's often overlooked is how easily you can tweak the motor's behavior. By adjusting the flow rate or reversing the oil's direction-usually through a control valve-you can change both the output speed and the rotation direction. This gives operators a great deal of flexibility without needing to swap out hardware. Whether you need a slow, steady turn for precise positioning or a fast spin for rapid cycling, it's all managed through the hydraulic circuit.

 

We also back our products with a global support team that knows these motors inside out. From installation guidance to on-site commissioning and troubleshooting, our engineers are available to help customers no matter where they're located. We've found that having this kind of hands-on support makes a real difference, especially when projects are time-sensitive or when local expertise is hard to come by.

 

That commitment to service isn't just a promise on paper. We've structured our support to be practical and responsive, so customers aren't left figuring things out alone. Whether it's a quick phone call or a site visit, we aim to resolve issues efficiently and keep operations running smoothly.

For buyers, this translates into peace of mind. Knowing that expert help is just a call away takes a lot of the risk out of investing in hydraulic equipment. It's one less thing to worry about when you're managing a complex system or a tight deadline.

 

 

 

 

◎ Axial Distribution structure and column stator and rotor design with high mechanical efficiency;

 

◎ Special dynamic sealing ring design with high back pressure bearing capacity;

 

◎ Multiple installation forms of Flanges, output shafts, ports, and etc.;

 

◎ Small volume, compact structure and light mass;

 

◎ Wide applications in the fields of plastic machines, machine tools, etc.

 

 

Displacement, cc/r		50	63	80	100	125	160	200	250	305	400
Flow, LPM	Cont.	38	45	57	57	57	57	57	57	57	57
	Int.	45	53	68	68	68	68	68	68	68	68
Speed, RPM	Cont.	698	663	679	558	452	354	284	235	203	156
	Int.	859	774	811	669	544	425	339	281	242	180
Pressure, Bar	Cont.	124	124	124	124	124	115	110	100	100	90
	Int.	138	138	138	138	138	124	124	124	124	100
Torque, Nm	Cont.	73	86	124	154	194	228	285	304	412	481
	Int.	84	93	139	173	216	261	319	378	483	525
Max. allowable back pressure		10MPa

 

 

 Cont.    Int.

 

50 cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	110	124	138
Flow, LPM	7.6	18	28	38	45	54	62
		125	110	96	86	76	65
	15.1	18	27	37	44	53	62	70	78	79
		260	250	238	231	215	206	196	188	229
	22.7	16	24	32	40	49	58	65	71	80
		414	406	395	385	375	368	356	345	370
	30.3	13	21	30	37	46	55	62	68	81
		550	540	528	515	502	485	480	672	518
	37.9	14	23	34	43	51	61	68	71	81
		698	698	693	690	689	684	681	672	672
	45.4		24	30	42	51	60	68	73	84
			859	856	853	851	847	844	837	832

 

63 cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	110	124	138
Flow, LPM	7.6	20	29	40	52	63	74
		110	108	108	105	104	103
	15.1	20	29	40	50	58	69	77	86	93
		220	214	212	210	206	202	200	198	198
	22.7	20	28	38	47	58	67	76	84	93
		332	330	326	324	320	316	314	310	305
	30.3	18	26	34	44	53	63	74	82	89
		443	440	436	434	432	430	428	426	425
	37.9	16	25	34	43	51	61	72	80	88
		554	550	548	546	542	540	538	534	530
	45.4		23	30	42	51	60	68	78	84
			663	660	658	654	650	648	645	643
	53			28	39	48	58	65	74	81
				774	770	768	764	760	754	750

 

80 cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	110	124	138
Flow, LPM	7.6	26	40	56	67	82	95	108
		91	90	87	84	83	77	73
	15.1	26	40	55	68	82	95	110	124	138
		184	182	179	178	173	168	163	157	127
	22.7	25	39	53	68	82	95	109	124	138
		277	276	270	268	265	256	254	245	210
	30.3	23	38	51	66	80	94	108	123	139
		370	368	362	359	356	384	344	355	293
	37.9	22	37	50	65	79	93	107	122	139
		426	46	452	450	446	436	432	432	376
	45.4	20	35	48	63	78	91	106	120	137
		555	552	544	540	536	527	521	511	457
	53		33	47	61	76	90	104	118	136
			634	633	629	626	616	611	599	535
	56.8			46	60	74	89	104	118	136
				670	674	671	659	654	642	574
	68			42	57	72	86	102	116
				811	808	804	791	787	772

 

100 cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	110	124	138
Flow, LPM	7.6	33	50	67	85	103	123	141
		73	72	69	67	65	61	57
	15.1	32	49	67	84	102	122	141	154	173
		149	147	144	142	140	135	131	125	99
	22.7	30	48	66	84	102	120	140	155	172
		224	222	219	217	213	208	204	196	165
	30.3	28	46	4	81	99	117	1308	151	173
		299	298	293	290	288	282	271	271	235
	37.9	26	44	61	79	97	114	138	149	172
		374	372	366	364	361	354	351	343	302
	45.4	25	43	59	77	95	112	131	147	169
		448	447	440	437	434	426	422	414	368
	53	22	40	58	75	94	110	129	143	168
		522	520	512	510	509	500	495	485	436
	56.8		39	56	74	93	107	127	141	168
			558	549	547	545	535	531	521	468
	68		35	51	71	89	104	125	140
			669	660	657	654	644	641	680

 

125 cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	100	124	138
Flow, LPM	7.6	43	64	86	108	130	157
		61	59	56	54	51	49
	15.1	42	63	85	106	129	156	194	216
		121	119	116	112	110	107	103	99
	22.7	42	63	84	106	128	156	192	215
		182	180	1//	1M	171	168	165	162
	30.3	41	62	83	105	128	155	191	213
		243	240	238	235	232	230	227	225
	37.9	40	61	83	104	126	155	190	213
		304	302	319	317	314	311	308	305
	45.4	38	61	82	102	125	154	190	212
		364	361	385	355	351	347	343	341
	53	36	60	81	101	124	152	189	211
		424	421	418	415	412	408	409	401
	56.8		58	80	99	122	151	187	211
			452	450	447	443	440	438	436
	68		57	79	97	121	149	185	209
			544	542	539	536	533	531	527

 

160 cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	115	124
Flow, LPM	7.6	56	85	113	141	175	206
		46	45	42	39	37	35
	15.1	54	79	111	140	173	205
		94	93	91	88	84	79
	22.7	55	78	111	142	174	205	228	261
		143	140	138	136	133	127	123	119
	30.3	51	81	109	139	171	203	226	258
		190	187	186	183	179	175	168	166
	37.9	45	75	110	135	171	199	230	256
		237	235	232	231	225	220	214	213
	45.4	40	65	102	134	163	192	212	247
		285	285	281	279	276	267	263	258
	53	38	61	98	129	158	189	212	246
		332	330	328	326	323	318	313	309
	56.8		57	95	126	154	182	209	240
			354	350	345	348	346	342	338
	68		52	90	119	147	176	200	229
			425	421	421	418	417	415	412

 

 

 Cont.    Int.

 

200cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	110	124
Flow, LPM	7.6	69	102	135	173	215	252	281
		37	35	33	30	2	23	19
	15.1	70	103	141	177	213	215	280	319
		75	/3	70	6	62	57	51	49
	22.7	64	95	135	176	215	248	238	318
		114	113	113	111	107	103	101	100
	30.3	58	92	128	172	209	245	285	318
		153	152	150	147	144	140	135	133
	37.9	63	96	135	173	210	247	282	315
		192	190	181	182	1"	173	167	165
	45.4	56	90	130	164	203	240	271	309
		230	228	226	223	219	214	210	208
	53		88	128	161	201	238	270	308
			267	264	262	256	252	246	242
	56.8		86	125	158	179	233	263	301
			284	282	279	278	275	2M	269
	68		81	118	152	192	226	265	295
			339	337	336	333	331	328	324

 

250cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	100	124
Flow, LPM	7.6	76	115	160	209	253	304
		28	27	25	24	22	19
	15.1	76	116	159	207	252	303	378
		62	61	59	58	55	48	48
	22.7	71	108	153	201	250	301	378
		93	92	90	87	83	76	75
	30.3	63	102	150	200	249	297	376
		124	124	122	119	115	109	107
	37.9	58	101	147	195	242	293	372
		157	156	154	150	146	139	137
	45.4	48	90	136	185	230	284	368
		188	187	185	180	176	171	169
	53	47	84	133	179	219	275	366
		219	218	216	213	209	200	175
	56.8		81	129	171	204	273	365
			235	234	232	229	228	228
	68		81	129	170	202	270	362
			281	280	278	272	273	269

 

305cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	97	110
Flow, LPM	7.6	97	145	206	260	326	352
		23	22	20	19	16	12
	15.1	100	147	204	259	325	361	403
		47	45	44	42	37	34	31
	22.7	97	140	188	262	320	364	401
		70	69	68	64	60	55	49
	30.3	91	135	195	256	315	357	395
		94	94	92	88	83	79	75
	37.9	75	125	185	247	305	350	393
		118	117	115	112	109	104	100
	45.4	68	127	191	250	305	348	392
		143	142	140	138	134	130	128
	53	65	113	177	240	296	342	390
		167	166	164	162	158	153	149
	56.8		108	170	234	290	338	390
			178	178	176	175	172	168
	68		102	168	233	288	336	387
			208	208	207	205	201	199

 

400cc/r

		Pressure difference, ΔBar
		28	41	55	69	83	90
Flow, LPM	7.6	153	235	323	411	496
		14	13	10	10	8
	15.1	142	215	305	390	485	485
		30	28	27	23	21	18
	22.7	133	205	302	386	437	483
		46	45	43	39	33	29
	30.3	123	184	296	370	466	506
		62	61	58	56	51	48
	37.9	120	181	282	378	467	516
		78	76	75	71	66	62
	45.4	110	192	287	377	457	510
		93	92	90	85	80	76
	53	91	166	251	342	417	475
		109	108	106	101	96	93
	56.8		165	249	338	403	471
			115	111	109	102	101
	68		159	242	327	389	448
			136	134	129	127	122

 

The above data are measured at the oil temperature of 50 ℃ and with 68# anti-wear hydraulic oil.

The actual test data may vary slightly from the data in the above table.

 

 

 

Displacement, cc/r	50	63	80	100	125	160	200	250	305	400
L mm	141.5	143.8	147	150.3	155.5	161.5	169.5	178.5	188.5	204.5

 

Standard direction of rotation: when facing shaft end of motor, shaft to rotate clockwise when the oil is fed at port A and discharged at port B, and vice versa.

 

 

 

 

Note: When a motor is ordered, the model and product number should be selected in the Motor Ordering Information based on the reference dimensions in the above figure; if the corresponding Dimensions and Mounting Data and product number can not be found in the ordering specifications, please contact the company marketing department.

 

 

 

Displacement, cc/r	50	63	80	100	125	160	200	250	305	400
L mm	129.5	131.8	135	138.3	143.5	149.5	157.5	166.5	176.5	192.5

 

Standard direction of rotation: when facing shaft end of motor, shaft to rotate clockwise when the oil is fed at port A and discharged at port B, and vice versa.

 

 

Note: When a motor is ordered, the model and product number should be selected in the Motor Ordering Information based on the reference dimensions in the above figure; if the corresponding Dimensions and Mounting Data and product number can not be found in the ordering specifications, please contact the company marketing department.

 

 

 

 

 

Displacement, cc/r	50	63	80	100	125	160	200	250	305	400
L mm	111.5	113.8	117	120.3	125.5	131.5	139.5	148.5	158.5	174.5

 

Standard direction of rotation: When facing shaft end of motor, shaft to rotate clockwise when the oil is fed at port A and discharged at port B, and vice versa.

 

 

 

Displacement, cc/r	50	63	80	100	125	160	200	250	305	400
L mm	210	212.3	215.5	218.8	224	230	238	247	257	273

 

For Dimensions and Mounting Datas of output shaft, flange, port and others of ZMPB series brake motor, see ZMP series motor Dimensions and Mounting Data.

 

 

Dimension				Displacement
Flange	Output shaft	Straight port surface	Port		50	63	80	100	125	160	200	250	320	400
2-hole rhombic flange, seam allownceΦ82.55	Φ25 straight shaft flat key 6.35		Port G1/2, internal drain port		150-0050	0051	0052	0053	0059	0054	0055	0056	0057	0058
	Φ25.4 straight shaft flat key 6.35		Port G1/2, internal drain port		150-0060	0061	0062	0063	0069	0064	0065	0066	0067	0068
	Φ25.4 straight shaft flat key 6.35		Port G1/2, external drain port M14×1.5		150-0090	0091	0092	0093	0099	0094	0095	0096	0097	0098
	Φ25 straight shaft flat key 8		Port G1/2, external drain port M14×1.5		150-0080	0081	0082	0083	0089	0084	0085	0086	0087	0088
			Port G1/2, internal drain port		150-0160	0161	0162	0163	0169	0164	0165	0166	0167	0168
	Φ25 straight shaft flat key 8		Port M18×1.5, external drain part M14×1.5		150-0040	0041	0042	0043	0049	0044	0045	0046	0047	0048
4-hole square flange, seam allownceΦ82.55	Φ25 straight shaft flat key 8		Port M18×1.5, internal drain port		150-0260	0261	0262	0263	0269	0264	0265	0266	0267	0268
4-hole square flange, seam allownceΦ80	Rectangular spline 6D-25×22×6		Port M18×1.5, external drain part M14×1.5		150-1110	1111	1112	1113	1119	1114	1115	1116	1117	1118
	Φ25 straight shaft flat key 8		Port M18×1.5, external drain part M14×1.5		150-0020	0021	0022	0023	0029	0024	0025	0026	0027	0028
			Port M18×1.5, internal drain port		150-0010	0011	0012	0013	0019	0014	0015	0016	0017	0018
4-hole square flange, seam allownceΦ82.55	Φ25 straight shaft flat key 8		Port M18×1.5, external drain part M14×1.5		150-0120	0121	0122	0123	0129	0124	0125	0126	0127	0128
Long square flange seam allownceΦ85	6D-25×22×6		Port M20×1.5, external drain port M14×1.5		150-1140	1141	1142	1143	1149	1144	1145	1146	1147	1148
2-hole rhombic flange, seam allownceΦ82.55	Φ25.4 straight shaft flat key 6.35	Staggered port surface	Port G1/2, internal drain port		150-0340	0341	0342	0343	0349	0344	0345	0346	0347	0348
	Φ25 straight shaft flat key 8		Port G1/2, external drain port M14X1.5		150-0350	0351	0352	0353	0359	0354	0355	0356	0357	0358
			Port G1/2, internal drain port		150-0430	0431	0432	0433	0439	0434	0435	0436	0437	0438
	Φ25.4 straight shaft flat key 6.35		Port G1/2, external drain port M14×1.5		150-0360	0361	0362	0363	0369	0364	0365	0366	0367	0368
	Φ25 straight shaft flat key 8		Port 1/2NPTF, external drain port M14×1.5		150-0370	0371	0372	0373	0379	0374	0375	0376	0377	0378
			Port G1/2, external drain port G1/4		150-0380	0381	0382	0383	0389	0384	0385	0386	0387	0388
	Φ25.4 straight shaft flat key 6.35		Port 1/2NPTF, internal drain port		150-0440	0441	0442	0443	0449	0444	0445	0446	0447	0448
			4-M8 plate type, internal drain port		150-0450	0451	0452	0453	0459	0454	0455	0456	0457	0458
	Φ25 straight shaft flat key 8		1/2 NPTF, external drain port G1/4		150-2100	2101	2102	2103	2109	2104	2105	2106	2107	2108

 

Note: When a motor is ordered, the model and product number should be selected in the Motor Ordering Information based on the reference dimensions in the above figure; if the corresponding Dimensions and Mounting Data and product number can not be found in the ordering specifications, please contact the company marketing department.

 

 

 

◎ Advanced stator and rotor parameters design, with low starting pressure, high efficiency and stable low speed operation;

◎ High operating pressure and high output torque;

◎ Advanced shaft seal design, with high back pressure bearing capacity;

◎ Advanced and reliable linkage shaft design, with a long motor service life;

◎ Advanced oil distribution mechanism design, with high oil distribution accuracy and automatic wear compensation;

◎ The motors can be used in series and parallel; when they are connected in series, they should be connected to the external drain pipe;

◎ Tapered roller bearing support design, with a large radial load carrying capacity, so that the motor can be used directly drive the operating mechanism.

 

 

Displacement, cc/r		63	80	100	125	160	200	250	305	400
Flow, LPM	Cont.	75	75	75	75	75	75	75	75	75
	Int.	95	95	95	95	115	115	115	115	115
Speed, RPM	Cont.	960	851	739	575	477	385	308	246	191
	Int.	1150	908	924	719	713	577	462	365	335
Pressure, MPa	Cont.	17	20	20	20	20	20	20	20	17
	Int.	21	24	24	24	24	24	24	24	21
Torque, Nm	Cont.	145	217	271	338	433	541	677	826	888
	Int.	179	260	325	406	520	650	812	885	925
Max. allowable back pressure		14MPa

 

◎ The intermittent operating pressure refers to the Max. allowable operating pressure at the motor inlet port, and the continuous operating pressure refers to the pressure difference between the inlet port and the return port.

◎ Do not operate the motor at the Max. speed and the Max. pressure at the same time.

◎ The motor operating time per minute must not exceed 10% under intermittent operating conditions.

◎ Recommended oil: anti-wear hydraulic oil; Viscosity: 37-73cst; Oil cleanliness: IS018/13; Max. operating oil temperature: 80 ℃.

◎ With special dynamic seal design, the Max. allowable back pressure of the motor can be up to 10MPa; however, in order to obtain the good service life and comprehensive mechanical performances, the back pressure should not exceed 5MPa. If it is exceeded, it is recommended to connect the external drain pipe; when connecting the external drain pipe, ensure that the motor is always filled with oil. The external drain pipe should be throttled at a certain degree, to maintain a back pressure of more than 3.5 Bar. When connecting the external drain pipe, in addition to maintaining a low back pressure, the wear contaminants generated inside the motor can be removed and a certain cooling effect can be achieved.

◎ There should be a running-in period before the motor is operated at full load. It is recommended to run for 1h at 30% of the Max. operating pressure.

 

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