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AZPW Gear Pump
AZPW Gear Pump
 

Rexroth AZPW Exteranl Gear Pump OEM Replacement

Pump Type External Gear Pump
Displacement Range Min 4cc/rev, Max 25cc/rev
Pressure Rating Rated Pressure 15Mpa, Max Pressure 19Mpa
Speed Range Min 700 RPM, Max 3500 RPM
Material Aluminum Alloy
Mounting Type See Offer Drawing
Rotation Clockwise or Counter-clockwise
Key Features High Performance
OEM Manufactured Compatibility Rexroth
MOQ 10 PCS
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Rexroth AZPW external gear pump alternatives from our dedicated factory are high-performance solutions constructed from durable aluminum alloy. Covering a versatile displacement range from 4 to 25 cc/rev, they deliver reliable flow with operational speeds between 700 and 3,500 RPM. Engineered for stable power, these pumps support a rated pressure of 15 MPa and a maximum pressure of 19 MPa. Available in both clockwise and counter-clockwise rotations, they ensure seamless system integration. As a direct manufacturer, we provide comprehensive OEM customization—including tailored drive shafts, front covers, and port connections. Experience a dependable, cost-effective drop-in equivalent for your hydraulic systems.
Nominal size 004 005 007 008 009 011 012
Series 1x
Displacement geometric,per revolution Vg cm³ 4.0  5.5 7.0  8.0  9.0  11.0  12.0 
Pressure at suction port S1)             absolute pe bar 0.7 … 3
Maximum continuous pressure p1 bar 190 190 190 190 190 190 190
Maximum intermittent pressure2) p2 bar 210 210 210 210 210 210 210
Maximum pressure peaks p3 bar 230 230 230 230 230 230 230
Minimum rotational speed V=12mm2/s <100 bar nmin rpm 700 700 700 700 700 700 700
100 to 180 bar nmin rpm 1200 1200 1000 1000 1000 1000 800
180 bar to P2 nmin rpm 1400 1400 1400 1400 1200 1200 1000
V=25mm2/s at P2 nmin rpm 700 700 700 700 700 700 700
Maximum rotational speed at P2 nmax rpm 3500 3500 3500 3500 3500 3500 3000
Nominal size 014 016 019 021 022 025
Series 1x
Displacement geometric,per revolution Vg cm³ 14.0  16.0  19.0  21.0  22.5  25.0 
Pressure at suction port S1)             absolute pe bar 0.7 … 3
Maximum continuous pressure p1 bar 190 190 180 170 170 150
Maximum intermittent pressure2) p2 bar 210 210 200 190 190 170
Maximum pressure peaks p3 bar 230 230 220 210 210 190
Minimum rotational speed V=12mm2/s <100 bar nmin rpm 700 700 700 700 700 700
100 to 180 bar nmin rpm 800 800 800 800 800 800
180 bar to P2 nmin rpm 1000 1000 1000 1000 1000 1000
V=25mm2/s at P2 nmin rpm 700 700 700 700 700 700
Maximum rotational speed at P2 nmax rpm 3000 3000 3000 2500 2500 2500

  Nominal Size（cm³/r） Material Part Number Maximum intermittent pressure(bar) Maximum Speed(rpm)
Counter-clockwise Clockwise
AZPW-11-…CB20MB 4 R983074473 R983074465 210 3500
5 R983074474 R983074466 210 3500
8 R983074475 R983074467 210 3500
11 R983074476 R983074468 210 3500
14 R983074477 R983074469 210 3000
16 R983074478 R983074470 210 3000
19 R983074479 R983074471 200 3000
21 R983074480 R983074472 190 2500
Operating Characteristics & Calculation Reference
Determining Operating Characteristics
The following formulas help estimate flow, torque, and power based on operating conditions. Values are for reference during system design and pump selection.
Formulas shown are commonly used for hydraulic gear pump performance estimation.
Symbol Description
Vg Displacement per revolution [cm³]
Δp Differential  pressure  [bar](Δp = p – pe)
n Rotational speed [rpm]
ηv Volumetric efficiency
ηhm Hydraulic-mechanical efficiency
ηt Total efficiency(ηt = ηv × ηhm)
Calculated values may vary depending on operating conditions, oil viscosity, and system configuration.
 
Suggested Applications
In addition to standard industrial and mobile hydraulic systems, our hydraulic gear pump solutions are also widely used in:
•Construction Machinery

Komatsu Excavator

•Agricultural Machinery 

New Holland Windrowers

•Material Handling Equipment

Forklift

•Industrial Hydraulic Systems

Rubber Vulcanizing Machine

•Mobile Hydraulic Systems

Street Sweeper

These application-oriented solutions support custom configurations to meet different system pressures, flow requirements, and installation conditions.

The AZPW series external gear pump supports extensive customization options, including drive shafts, front covers, port connections, sealing materials, and direction of rotation to meet diverse hydraulic system requirements.

Customization Item Available Options
Drive Shaft Tapered Keyed Shaft
Tang Drive
Splined Shaft
Parallel Keyed Shaft
Front Cover Rectangular Flange
2-bolt Flange
2-bolt Mounting
4-bolt Mounting
4-bolt Rectangular Flange
Port Connection Pipe Thread According to ISO 228-1
UN-thread According to ISO 11926-1/ASME B 1.1,O-ring
Square Flange(German Version)
Square Flange(Italian Version)
Metric Thread According to ISO 6149,O-ring
Sealing Material NBR(Nitrile Rubber)
FKM(Fluorocarbon Rubber)
NBR(Nitrile Rubber),Shaft Seal in FKM(Fluoroelastomer)
Rear Cover Standard(Cast Iron)
Pressure Relief Valve
Short Cover
We ensure the exact performance of every OEM replacement for the Rexroth AZPW series hydraulic gear pump through strict, end-to-end manufacturing controls:
  • Material Verification: We cast our own housings and physically cut samples to guarantee zero internal porosity. In-house gear production ensures absolute control over material strength.
  • Automated Precision: CNC machining centers integrated with robotic arms eliminate human error, maintaining exact dimensional consistency for every component.
  • Contamination Control: To ensure internal cleanliness, all pumps are assembled in a strict temperature-controlled, dust-free cleanroom.
  • 100% Performance Tested: Every finished unit undergoes strict air-tightness verification and dynamic bench testing, guaranteeing a volumetric efficiency of ≥95%.
  • Quality Guarantee: We stand behind our manufacturing standards, backing our pumps with up to a 12-month warranty under normal operating conditions.

Hydraulic Gear Pump – FAQ

What is an external gear pump?

An external gear pump is a positive-displacement hydraulic pump that uses two externally meshing gears to deliver stable hydraulic flow.

What applications are external gear pumps commonly used for?

External gear pumps are widely used in construction machinery, agricultural equipment, industrial hydraulic systems, material handling, and mobile hydraulics.

What pressure range can an external gear pump handle?

Most external gear pumps operate at rated pressures up to 200–250 bar, with higher peak pressure depending on design and materials.

What displacement ranges are available?

External gear pumps are available in a wide range of displacements, typically from 1 cc/rev to over 100 cc/rev, depending on series and configuration.

What speed range is suitable for external gear pumps?

Typical operating speed ranges from 500 to 3000 RPM, depending on load conditions, oil viscosity, and pump design.

Can external gear pumps be customized?

Yes. External gear pumps can be customized in terms of displacement, pressure rating, shaft type, mounting flange, port size, and rotation direction.

Are external gear pumps interchangeable with OEM brands like Rexroth?

Many external gear pumps are designed to be dimensionally interchangeable with major OEM brands such as Rexroth, Danfoss, Eaton, and Parker.

What materials are used for external gear pumps?

Common materials include aluminum alloy housings for lightweight applications and cast iron housings for higher pressure and heavy-duty use.

What hydraulic fluids can be used?

External gear pumps are compatible with mineral hydraulic oils, HLP/HV oils, and other standard industrial hydraulic fluids.

How do I select the right external gear pump?

Selection depends on pressure rating, displacement, speed range, application requirements, and installation dimensions. Contact our engineers for technical support.

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