Marzocchi Hydraulic Motor GHM Series
Marzocchi GHM Series
Marzocchi GHM series is a range of high-performance hydraulic motors, featuring aluminum alloy housing, cast iron flanges and rear covers. With a displacement range of 1.4 cc/rev to 87 cc/rev and a maximum continuous working pressure of 250 bar, they are widely applied in both industrial and mobile hydraulic systems. The series is characterized by high versatility, strong durability, long service life, good hydraulic and mechanical efficiency, and low noise level. The following are the detailed models and parameters of each group.
1. GHM 1 Group
The GHM 1 group is a small-displacement series, including unidirectional and bidirectional hydraulic motors, with displacement ranging from 1.4 cc/rev to 13.8 cc/rev. It adopts a compact design, suitable for applications with limited installation space, and conforms to DIN Group 1 mounting standards.
1.1 Models and Detailed Parameters
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Model
|
Displacement (cc/rev)
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Flow at 1500 rev/min (L/min)
|
Max Continuous Pressure (bar)
|
Max Peak Pressure (bar)
|
Max Speed (rpm)
|
|
GHM 1-R-4-E1
|
2.8
|
4.2
|
250
|
270
|
4800
|
|
GHM 1-R-6-E1
|
4.1
|
6.2
|
250
|
270
|
4000
|
|
GHM 1-R-9-E1
|
6.2
|
9.3
|
230
|
245
|
3800
|
|
GHM 1-R-11-E1
|
7.6
|
11.4
|
200
|
215
|
3200
|
|
GHM 1-R-16-E1
|
11.0
|
16.5
|
170
|
185
|
2200
|
Key Notes: The GHM 1 group also includes models such as GHM 1, GHM 1-EO, GHM 1A, GHM 1A-EO. The max continuous backpressure is 6 bar for unidirectional motors and 240 bar for bidirectional motors; max drain line pressure is 6 bar for bidirectional motors. The gear is made of special steel, processed by carburizing and quenching, with high surface finish.
2. GHM 2 Group
The GHM 2 group covers medium-displacement unidirectional and bidirectional hydraulic motors, with displacement ranging from 4.5 cc/rev to 35.2 cc/rev (unidirectional) and 4.5 cc/rev to 28.2 cc/rev (bidirectional). It offers various configurations including European, SAE, and German standards, suitable for a wide range of industrial and mobile hydraulic applications.
2.1 Models and Key Parameters
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Model Series
|
Displacement Range (cc/rev)
|
Max Continuous Pressure (bar)
|
Max Peak Pressure (bar)
|
Max Speed (rpm)
|
Key Configurations
|
|
GHM 2, GHM 2-EO, GHM 2A, GHM 2A-EO
|
4.5 – 35.2 (unidirectional); 4.5 – 28.2 (bidirectional)
|
250
|
290 (unidirectional); 270 (bidirectional)
|
4000
|
Standard flange, cylindrical or splined shaft
|
|
GHM 2-T, GHM 2A-T
|
4.5 – 35.2 (unidirectional); 4.5 – 28.2 (bidirectional)
|
250
|
290 (unidirectional); 270 (bidirectional)
|
4000
|
Rectangular flange (GHM 2-T); SAE A flange (GHM 2A-T), conical/cylindrical/splined shaft
|
|
GHM 2 BK1, GHM 2 BK1-T
|
4.5 – 35.2 (unidirectional); 4.5 – 28.2 (bidirectional)
|
250
|
290 (unidirectional); 270 (bidirectional)
|
4000
|
Bosch rectangular flange, conical or splined shaft
|
|
GHM 2 BK1-R-16-E1
|
11.5
|
250
|
290
|
4000
|
Bosch rectangular flange
|
Key Notes: The max continuous backpressure is 6 bar for unidirectional motors and 240 bar for bidirectional motors; max drain line pressure is 6 bar for bidirectional motors. The housing is formed by extrusion, and the flange and cover are die-cast, made of special high-temperature resistant aluminum alloy to minimize deformation under high pressure.
3. GHM 3 Group
The GHM 3 group is designed for large-displacement requirements, with displacement ranging from 20 cc/rev to 87 cc/rev (unidirectional) and 22 cc/rev to 87 cc/rev (bidirectional). It features high load-bearing capacity, excellent wear resistance, and is suitable for heavy-duty hydraulic applications requiring high power output.
3.1 Models and Key Parameters
|
Model Series
|
Displacement Range (cc/rev)
|
Max Continuous Pressure (bar)
|
Max Peak Pressure (bar)
|
Max Speed (rpm)
|
Key Configurations
|
|
GHM 3, GHM 3A
|
20 – 87 (unidirectional); 22 – 87 (bidirectional)
|
250
|
270 (unidirectional); 250 (bidirectional)
|
3500 (unidirectional); 2500 (bidirectional)
|
Heavy-duty configuration, reinforced bearing, suitable for high-load scenarios
|
Key Notes: The max continuous backpressure is 6 bar for unidirectional motors and 220 bar for bidirectional motors; max drain line pressure is 6 bar for bidirectional motors. It is equipped with special low-friction and high-wear-resistance aluminum alloy bushings, ensuring stable operation under heavy load.
General Specifications of GHM Series
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Design: External gear motor, simple structure, low maintenance cost, and long service life. Equipped with special symmetrical compensation belts and pre-formed seals with anti-extrusion rings.
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Hydraulic Fluid: Suitable for standard hydraulic fluids; proper filtering of the hydraulic system is required to ensure product performance and service life.
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Rotation Direction: Available in left (GHM…L) and right (GHM…D) configurations; bidirectional models support reverse operation, with stable performance during forward and reverse rotation.
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Installation: Follow the installation guidelines provided by Marzocchi to ensure proper connection of supply and delivery lines, avoid fluid turbulence, and ensure the motor is firmly fixed.
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Material: Aluminum alloy housing, cast iron flanges and rear covers, special steel gears, ensuring high strength and corrosion resistance.
