OMT Hydraulic Wheel Motor

Endface distribution cycloid hydraulic motor;
Advanced column stator and rotor parameters design, with low starting pressure, high efficiency and stable low speed operation.

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Product Introduction

ZMT Series Hydraulic Wheel Motor: Structural Features and Technical Specifications

Structural Characteristics

◎ End-face distribution cycloidal hydraulic motor design

◎ The OMT hydraulic wheel motor features an optimized pin-type stator-rotor structure, characterized by low starting pressure, high operating efficiency, and smooth low-speed operation.

◎ Enhanced shaft sealing system with exceptional back pressure resistance

◎ Robust linkage shaft construction ensures extended motor service life

◎ The OMT hydraulic wheel motor features a precision-engineered valving mechanism that ensures accurate flow control and automatic wear compensation.

◎ Compatible with both series and parallel circuit configurations (external drainage connection required for series operation)

◎ Flexible installation options including various flange types, output shaft designs, and port arrangements

Technical Specifications

Displacement, cc/r		195	245	310	390	490	625	800	985
Flow, LPM	Cont.	150	150	150	150	150	150	150	150
Flow, LPM	Int.	170	210	225	225	225	225	225	225
Speed, RPM	Cont.	775	615	485	387	307	241	184	153
Speed, RPM	Int.	866	834	698	570	454	355	278	230
Pressure, MPa	Cont.	20.5	20.5	20.5	20.5	17	14	12	12
Pressure, MPa	Int.	25	25	25	25	21	17	14	14
Torque, Nm	Cont.	541	680	860	1082	1150	1185	1300	1600
Torque, Nm	Int.	660	830	1050	1320	1400	1450	1520	1875
Max. allowable back pressure		10MPa

◎ Intermittent operating pressure indicates maximum allowable inlet pressure; Continuous operating pressure refers to the pressure differential between inlet and return ports
◎ Avoid simultaneous operation at both maximum speed and maximum pressure conditions
◎ Intermittent duty cycle must not exceed 10% within any 60-second period
◎ Recommended hydraulic fluid: anti-wear hydraulic oil with viscosity range of 37-73 cSt
◎ Fluid cleanliness level: ISO 18/13 or better
◎ Maximum operating oil temperature: 80°C
◎ Special dynamic seal design enables maximum back pressure tolerance up to 10 MPa
◎ For optimal service life and mechanical performance, maintain back pressure below 5 MPa
◎ When back pressure exceeds 5 MPa, connect external drain pipe ensuring motor remains filled with oil
◎ External drain should be throttled to maintain minimum back pressure of 3.5 Bar
◎ External drainage system provides additional benefits of contaminant removal and cooling effect
◎ Before operating the OMT hydraulic wheel motor at full load, a break-in procedure must be performed: operate at 30% of maximum pressure for one hour.

ZMT Series Motor Performance Data at Different Operating Points

Cont. Int.

195cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240	275
Flow, LPM	1.9	75	165	260
	1.9	7	5	2
	7.5	75	170	265	350	440	470
	7.5	37	35	34	30	26	18
	15	80	175	270	365	455	520	590	655
	15	76	74	72	66	62	46	32	18
	30	85	180	275	370	465	545	625	705
	30	153	148	144	131	119	116	99	83
	45	85	180	280	375	475	565	655	750
	45	230	225	221	212	203	186	167	148
	61	80	180	280	375	475	575	665	760
	61	307	303	300	291	283	258	236	214
	76	80	180	280	380	480	575	670	770
	76	384	379	374	365	356	332	306	280
	91	80	175	275	375	475	575	670	770
	91	462	456	450	440	429	413	388	363
	106	75	175	270	375	475	570	670	770
	106	539	532	526	514	502	476	448	421
	121	70	170	270	370	470	570	670	765
	121	617	609	602	589	576	542	511	480
	136	70	165	265	365	465	565	665	765
	136	692	683	674	659	645	601	564	527
	151	70	165	260	365	465	560	660
	151	770	759	746	733	718	666	624
	170	65	160	260	360	460	555	655
	170	866	854	843	825	808	749	702

The motor is highly efficient at all operating points with specified data, but it is recommended to operate it in the continuous operating area for the optimum efficiency and long service life.

245cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240	275
Flow, LPM	1.9	95	215
	1.9	4	1
	7.5	100	220	340	445	555	570	670
	7.5	29	26	24	21	17	11	6
	15	105	225	345	460	575	640	750	855
	15	60	56	54	48	42	39	30	12
	30	110	235	355	475	595	700	800	905
	30	120	116	113	104	95	81	67	53
	45	110	235	360	480	605	720	840	955
	45	182	178	174	165	157	141	125	109
	61	110	235	360	485	610	730	845	960
	61	244	240	236	228	221	202	184	165
	76	105	230	355	485	615	735	855	980
	76	306	301	297	287	277	257	238	218
	91	105	230	355	480	610	735	860	980
	91	365	361	358	348	338	316	294	271
	106	100	225	350	480	610	730	855	980
	106	426	421	416	404	376	358	340	322
	121	90	215	345	470	600	725	850	975
	121	489	481	475	461	448	423	398	373
	136	80	210	335	460	580	710	840
	136	549	543	537	524	509	482	456
	151	80	200	330	455	580	700	800
	151	612	606	599	585	570	540	510
	170	65	200	325	445	575	685	755
	170	688	682	674	685	641	608	574
	189		195	315	440	555	670
	189		758	749	731	712	676
	208		190	310	430	550	665
	208		834	824	804	783	744

The above data are measured at the oil temperature of 50℃ and with 68# anti-wear hydraulic oil; for different motors, the data will be slightly different.

ZMT Series Motor Performance Data at Different Operating Points

Cont. Int.

310cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240	275
Flow, LPM	1.9	60	125	275
	1.9	6	4	1
	7.5	130	280	410	540	646	755	880
	7.5	23	22	20	17	14	10	4
	15	135	290	430	570	685	800	935	1025
	15	47	45	42	38	32	24	17	10
	30	140	300	450	595	730	870	985	1105
	30	95	91	87	81	73	64	55	46
	45	140	305	460	610	760	910	1045	1185
	45	143	140	135	129	121	111	99	88
	61	140	300	460	615	770	920	1060	1205
	61	192	188	184	178	167	156	141	126
	76	135	295	455	615	770	925	1075	1225
	76	241	236	323	226	216	201	184	167
	91	130	295	455	615	775	930	1080	1230
	91	289	282	279	273	260	248	232	215
	106	130	290	450	610	770	930	1075	1225
	106	336	333	328	320	308	295	276	257
	121	125	285	445	600	765	920	1065
	121	384	381	375	368	354	341	320
	136	130	375	435	590	750	915	1055
	136	430	421	416	410	396	383	360
	151	115	270	426	480	745	905	1040
	151	487	466	461	456	441	427	403
	189	110	245	385	525	685	840
	189	597	582	576	570	551	534
	227		220	365	515	650	800
	227		698	691	684	661	641

The motor is highly efficient at all operating points with specified data, but it is recommended to operate it in the continuous operating area for the optimum efficiency and long service life.

390cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240	275
Flow, LPM	3.8	175	365
	3.8	2	1
	7.5	180	370	555	730	875	1025	1195
	7.5	18	17	16	14	12	9	4
	15	185	375	560	740	920	1080	1275	1370
	15	38	37	35	33	29	22	14	5
	30	185	380	575	760	950	1135	1315	1455
	30	76	74	72	68	65	55	45	33
	45	185	385	580	770	965	1150	1340	1540
	45	115	112	109	105	100	91	81	79
	61	180	380	580	770	965	1155	1345
	61	154	151	147	143	132	126	116
	76	180	380	580	775	970	1160	1355
	76	193	189	187	182	175	162	152
	91	170	370	570	765	965	1155
	91	230	229	225	220	212	204
	106	165	365	565	760	960	1150
	106	268	266	261	256	248	236
	121	160	355	555	750	945	1145
	121	306	304	299	292	282	269
	136	155	340	545	730	730	1130
	136	346	340	336	329	317	301
	151	150	325	535	730	915
	151	386	380	375	368	359
	189	130	300	515	730	910
	189	482	475	469	460	449
	227		280	500	720	890
	227		570	562	552	538

The above data are measured at the oil temperature of 50℃ and with 68# anti-wear hydraulic oil; for different motors, the data will be slightly different.

ZMT Series Motor Performance Data at Different Operating Points

Cont. Int.

490cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240
Flow, LPM	3.8	235	480	695
	3.8	7	5	3
	7.5	240	480	710	945	1175	1370
	7.5	14	13	12	11	8	3
	15	235	485	725	960	1195	1410	1645
	15	30	29	28	27	25	21	17
	30	235	485	735	975	1215	1445	1685
	30	60	59	57	54	51	45	38
	45	235	485	735	975	1220	1455
	45	91	89	87	84	79	71
	61	235	480	730	975	1220	1460
	61	122	121	118	114	109	100
	76	225	470	725	975	1220
	76	152	150	147	144	139
	91	220	470	720	970	1215
	91	184	181	180	176	171
	106	210	460	710	960	1210
	106	214	211	208	204	198
	121	195	450	700	950	1205
	121	244	241	237	232	226
	136	175	435	685	940	1175
	136	275	272	265	260	255
	151	160	425	675	920	1150
	151	306	303	295	290	284
	189	130	365	59	860
	189	382	379	369	362
	227		325	550	805
	227		454	442	435

The motor is highly efficient at all operating points with specified data, but it is recommended to operate it in the continuous operating area for the optimum efficiency and long service life.

625cc/r		Pressure, ΔBar
		35	50	70	85	105	120	140
Flow, LPM	3.8	250	380	510	640	755
	3.8	5	4	4	3	2
	7.5	260	395	535	670	795	925	1060
	7.5	12	13	13	10	10	8	6
	15	275	425	570	710	850	955	1065
	15	24	24	24	22	21	18	16
	30	295	450	605	755	925	1095	1270
	30	45	44	44	43	42	39	37
	45	295	450	610	765	920	1125	1330
	45	72	71	71	70	68	66	64
	61	285	445	605	760	915	1120	1325
	61	94	93	92	91	89	87	85
	76	280	440	595	755	915	1125	1325
	76	119	118	117	116	115	112	110
	91	265	430	585	745	905	1110	1320
	91	143	142	140	139	138	135	132
	106	255	415	575	735	895	1105	1315
	106	168	166	165	164	162	159	156
	121	240	400	560	720	880	1090	1300
	121	192	190	188	187	185	182	179
	136	220	380	540	700	855	1050
	136	216	214	213	212	210	207
	151	200	360	520	680	835	1015
	151	240	239	238	237	236	233
	189		310	470	630	790
	189		298	296	294	290
	227		255	430	590	745
	227		355	353	350	345

The above data are measured at the oil temperature of 50℃ and with 68# anti-wear hydraulic oil; for different motors, the data will be slightly different.

ZMT Series Motor Performance Data at Different Operating Points

Cont. Int.

800cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240
Flow, LPM	1.9	420	590	776	960
	1.9	4	4	3	2
	7.5	420	594	790	972	1176	1344	1568
	7.5	4	8	8	7	6	5	4
	15	435	608	840	1020	1204	1308	1650
	15	18	17	17	16	15	14	13
	30	420	396	830	1005	1204	1415	1610
	30	36	35	35	34	33	31	29
	45	380	565	795	972	1190	1362
	45	55	55	54	54	53	51
		340	520	760	940	1172
	61	75	74	72	71	70
		325	500	730	900	1140
	76	93	92	90	89	87
		315	470	700	860	1080
	91	111	110	109	108	105
		310	450	650	800 125	1020
	106	129	128	127	800 125	123
		280	420	610	750
	121	148	146	145	143
		270	400	550	700
	136	166	165	165	164
		250	350	500	635
	151	184	183	182	180
			300	440	580
	189		230	228	225
				380	520
	227			276	273

The motor is highly efficient at all operating points with specified data, but it is recommended to operate it in the continuous operating area for the optimum efficiency and long service life.

985cc/r		Pressure, ΔBar
		35	70	105	140	170	205	240	275
Flow, LPM	3.8	215	465	645	865	1080
	3.8	3	3	2	2	1
	7.5	215	470	710	940	1175	1410	1565	1685
	7.5	8	8	7	7	6	5	4	3
	15	225	485	775	965	1205	1445	1570	1790
	15	15	15	15	14	14	13	13	13
	30	230	490	750	995	1235	1480	1640	1875
	30	30	30	30	29	28	27	26	25
	45	230	495	750	1000	1250	1495	1700
	45	45	45	45	44	43	42	41
	61	225	490	740	995	1245	1500
	61	61	61	61	60	59	58
	76	215	475	730	985	1235	1485
	76	77	77	76	76	75	74
	91	205	460	705	960	1220	1470
	91	92	92	92	91	90	89
	106	185	445	700	950	1200	1450
	106	107	107	107	106	105	103
	121	165	425	675	925	1160
	121	123	123	122	121	120
	136	130	395	645	895	1125
	136	138	138	138	137	135
	151	95	365	610	865	1085
	151	153	153	152	151	150
	189		325	585	830	1050
	189		191	190	189	188
	227			525	810	1025
	227			230	229	226

The above data are measured at the oil temperature of 50℃ and with 68# anti-wear hydraulic oil; for different motors, the data will be slightly different.

ZMT Series Standard Motor - Output Shaft Dimensions and Mounting Data

Displacement, cc/r	195	245	310	390	490	625	800	985
L mm	253.2	258.8	266	276.5	285.9	300.5	321.5	340.3

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.

ZMT Series Standard Motor Dimensions and Mounting Data

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.

ZMT Series Standard Motor - Output Shaft Dimensions and Mounting Data

ZMT Series Standard Motor - Port Dimensions and Mounting Data

Port number	Main port D	External drain port C
Y01	M33×2	M14×1.5
Y02	G1	G1/4
Y03	1 5/16-12	7/16-20
Y04	M24×1.5	M14×1.5
Y05	M22×1.5	M14×1.5

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