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DM Series Hydraulic Motor for High-Pressure Industrial Drive Systems

DM series product is such kind of low speed high torque motor with crankshaft and connecting rod, produced in strict accordance with the technology and standard of Italy.
Meanwhile, we also employ new technology to improve the motor performance according to the market requirements.

The main features include:
1. Low noise due to an eccentric crankshaft and low excitation . frequency of five-piston design;
2. Revolve steadily under very low speed due to high starting torque and good low-speed stability;
3. Good reliability and less leakage due to the patented flat compensation distributor, special sealing between piston and plunger bushing guarantees higher volumetrical effvciency;
4. High mechanical efficency due to roller bearing between crankshaft and connecting rod;
5. Reversible rotation, and the output shaft can bear certain extermal force from both radial and axial diredtions;
6. High power-mass ratio, small volume and light weight.

product description

Technical Specification

Model	Displacement (ml/r)	Rate Pressure (Mpa)	Peak Pressure (Mpa)	Rated Torque (N.m)	Theoric Specific Torque (N.M/Mpa)	Speed Range (r/min)	Weight (kg)
DM1-63	64	16	22	150	9	15~750	21
DM1-80	78	16	20	183	11	15~700	21
DM1-100	96	16	20	225	14	15~650	21
DM1-125	126	16	20	295	18	15~600	21
DM1-160	159	14	18	326	23	15~600	21
DM1-200	196	14	18	401	29	15~600	21
DM2-100	113	16	20	264	17	10~550	28
DM2-150	159	16	20	372	23	10~500	28
DM2-175	180	16	20	421	26	10~450	28
DM3-200	206	16	20	482	30	8~450	28
DM3-250	235	14	18	481	34	8~400	35
DM3-280	276	12	18	484	40	8~400	35
DM3-175	181	16	21	424	26	8~600	35
DM3-200	201	16	21	470	29	8~600	35
DM3-250	254	16	21	594	37	8~500	35
DM3-300	289	14	21	592	42	8~450	35
DM3-350	340	12	18	597	50	6~400	35
DM3-400	380	12	18	667	56	6~350	35
DM6-400	397	16	20	939	59	5~450	58
DM6-450	452	16	20	1069	67	5~450	58
DM6-500	491	16	20	1162	73	5~420	58
DM6-600	594	16	20	1405	88	5~380	58
DM6-700	683	16	20	1616	101	5~350	58
DM6-750	754	14	18	1561	111	5~320	58
DM8-600	617	16	20	1444	90	5~320	72
DM8-700	710	16	20	1662	104	5~320	72
DM8-800	810	14	20	1659	118	5~300	72
DM8-900	889	14	20	1821	130	5~300	72
DM8-1000	1000	12	18	1755	146	5~280	72
DM11-700	707	16	20	1673	105	5~300	95
DM11-800	784	16	20	1855	116	5~300	95
DM11-900	894	16	20	2115	132	5~300	95
DM11-1000	981	16	20	2321	145	5~300	95
DM11-1100	1104	16	20	2612	163	5~280	95
DM11-1200	1234	14	20	2555	182	5~260	95
DM11-1300	1301	14	18	2693	192	5~250	95
DM16-1400	1413	16	20	3307	207	5~260	170
DM16-1600	1648	16	20	3857	241	5~250	170
DM16-1800	1815	16	20	4248	265	5~220	170
DM16-2000	2035	14	18	4168	298	5~220	170
DM16-2400	2408	14	18	4931	352	5~200	170
DM31-2500	2553	16	20	5975	373	5~200	298
DM31-2800	2683	16	20	6280	392	5~180	298
DM31-3000	3063	16	20	7169	448	5~180	298
DM31-3150	3218	16	20	7532	471	5~180	298
DM31-3500	3461	16	20	8100	506	5~160	298
DM31-4000	4153	16	20	9720	608	5~160	298
DM31-4500	4522	16	20	10584	661	5~150	298
DM31-5000	4828	14	18	9887	706	5~130	298
DM70-4600	4604	16	20	10776	673	5~120	550
DM70-5000	4946	16	20	11576	724	5~120	550
DM70-5400	5452	16	20	12760	798	5~120	550

Application Scenarios

The DM series low speed high torque hydraulic motor is purpose-built for heavy industrial power transmission applications requiring high torque output at low rotational speeds. In plastic processing equipment, the DM motor drives the hydraulic pump assemblies of injection molding machines and extruders, where its high starting torque accommodates the initial clamping force demand while its stable low-speed performance supports controlled injection profiling. For mobile construction machinery including small excavators, telehandlers, and tracked drilling rigs, the DM motor's compact high power-to-mass ratio delivers reliable rotational drive for undercarriage systems and attachment implements within space-constrained vehicle frames. The agricultural equipment sector employs DM motors in tractor-mounted harvesters, combines, and self-propelled sprayers where the reversible rotation feature allows bidirectional drive for header and reel mechanisms.

Municipal waste collection vehicles use DM motors to power the compactor and arm actuators, benefiting from the motor's ability to handle intermittent shock loads without stalling. Industrial press machinery, including C-frame and four-column presses used in metal forming and stamping, relies on the DM motor for direct or gearbox-reduced drive of the press ram, where consistent torque delivery at low speeds ensures even force distribution across the work piece. Additionally, the marine equipment industry specifies DM motors in deck winches, crane swing drives, and anchor windlass applications where salt-corrosion-resistant external sealing and robust roller bearing construction provide reliable service in demanding offshore environments.

FAQ

Q: What displacement and torque ranges are available in the DM series?

A: The DM series spans nine frame sizes from DM1 to DM70, with displacements ranging from 64 ml/r (DM1-63) to 4,828 ml/r (DM31-5000), and peak torque ratings reaching up to 10,776 N.m for the DM70-4600 model. Rated pressure spans 12 to 16 MPa across models, with peak pressure ratings of 18 to 22 MPa depending on the specific variant.
Q: What is the maximum allowable speed for DM series motors?

A: Maximum speed varies by model, ranging from 750 r/min for the DM1 series down to 120-160 r/min for the larger DM31 and DM70 frames. Minimum speeds as low as 5 r/min are achievable with the DM6, DM8, DM11, DM16, DM31, and DM70 series, providing the very low-speed stability required for direct-drive heavy machinery applications.
Q: How does the five-piston design reduce operating noise?

A: The eccentric crankshaft combined with a five-piston configuration produces overlapping force impulses that cancel high-frequency excitation components, resulting in significantly lower noise levels compared to conventional three-piston designs. The low excitation frequency of this design makes the DM motor suitable for noise-sensitive environments such as urban construction sites and indoor industrial facilities.

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DM Series Hydraulic Motor for High-Pressure Industrial Drive Systems

Technical Specification

Application Scenarios

FAQ

Q: What displacement and torque ranges are available in the DM series?

Q: What is the maximum allowable speed for DM series motors?

Q: How does the five-piston design reduce operating noise?

Send Inquiry

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