AZPB-32-1.0RCP02MB Rexroth Gear Pump 1cc 220bar

Product Overview

The Bosch Rexroth AZPB is a high-performance fixed-displacement external gear pump platform designed for compact hydraulic circuits requiring reliable flow delivery, high manufacturing consistency and long service life.

The AZPB platform covers geometric displacements from 1.0 to 7.1 cm³/rev. Its engineering concept combines pressure-dependent gap sealing, high-load slide bearings, precision manufacturing and multiple shaft, mounting and port configurations.

For the specific configuration AZPB-32-1.0RCP02MB, the verified geometric displacement is 1.0 cm³/rev. The “32” in the model designation must not be interpreted as a 32 cm³/rev displacement. Bosch Rexroth’s official dimensional documentation identifies AZPB-32 as a preferred mounting/front-cover configuration, while the displacement is separately defined by the 1.0 size code.

This makes accurate model matching especially important during replacement. A proper interchangeability check should include displacement, rotation direction, drive shaft, mounting geometry, port connection, sealing material and available installation envelope.

Technical Specifications

AZPB-32-1.0RCP02MB

• Manufacturer: Bosch Rexroth
• Series: AZPB
• Product Type: High-Performance External Gear Pump
• Displacement Type: Fixed displacement
• Geometric Displacement: 1.0 cm³/rev
• Maximum Continuous Pressure: 220 bar
• Maximum Intermittent Pressure: 250 bar
• Maximum Pressure Peak: 270 bar
• Minimum Speed at p2: 750 rpm
• Maximum Speed at p2: 6000 rpm
• Absolute Suction Port Pressure: 0.7–3 bar
• Rotation: Clockwise or counterclockwise versions are available; the installed pump must follow the specified rotation direction
• Drive Shaft: C = 1:5 tapered shaft
• Front Cover: P = 2-hole flange, Ø32 mm
• Port Connection: 02 = DIN 3852-T1 metric thread
• Seal Material: M = NBR
• Rear Cover: B = standard
• Flow Calculation: qV = Vg × n × ηv / 1000
• Replacement Testing: 100% simulated working-condition testing can be performed for our replacement units according to the original application requirements.

The displacement, pressure and speed values above are based on Bosch Rexroth technical documentation RE 10088.

Key Technical Advantages

1. Pressure-Dependent Gap Sealing

The AZPB uses pressure-dependent axial and radial sealing principles. Hydraulic pressure assists the sealing mechanism around the gear chambers, helping control internal clearances and reduce leakage losses.

This is important for maintaining volumetric performance while limiting unnecessary friction and heat generation.

2. Heavy-Duty Slide Bearings

Bosch Rexroth specifies slide bearings designed for high loading and good emergency running behavior, particularly at low rotational speeds.

For applications with variable loading, this bearing concept contributes to durable operation and mechanical robustness.

3. Precision Manufacturing

Rexroth identifies precision manufacturing and pressure-dependent gap sealing as key technologies for achieving high efficiency and reducing heat losses.

In practical engineering terms, gear accuracy, axial clearance and bearing interfaces are critical factors governing leakage, efficiency and temperature rise in a fixed-displacement gear pump.

4. Compact Platform Architecture

With a 1.0–7.1 cm³/rev displacement range and multiple shaft, mounting and port configurations, the AZPB platform provides a compact solution for space-limited hydraulic systems.

This platform approach also simplifies engineering replacement when the original installation interface must be maintained.

5. Multiple-Pump Capability

Bosch Rexroth states that AZPB pumps can be used in multiple-pump arrangements. However, combined installations must account for the resulting drive torque and pressure limitations rather than simply adding individual pump ratings together.

6. Flexible Mechanical Interfaces

AZPB configurations support ISO/SAE and customer-specific drive solutions, together with different front covers and port arrangements. This makes the platform suitable for engineered replacement, retrofit and application-specific hydraulic power units.

Application Areas

Typical applications include:

• Compact industrial hydraulic power units
• Small hydraulic power packs
• Auxiliary hydraulic circuits
• Lubrication and auxiliary oil supply systems
• Compact mobile machinery
• Multi-pump hydraulic systems
• Rexroth external gear pump replacement projects
• Industrial equipment retrofit applications

The AZPB-32-1.0RCP02MB, with its 1.0 cm³/rev displacement and 6000 rpm maximum speed at p2, is particularly suited to compact, low-flow and relatively high-speed hydraulic circuits. Actual delivered flow must be calculated using displacement, rotational speed and volumetric efficiency.

Expert Maintenance Tips

Verify Rotation Before Commissioning

AZPB pumps must be operated only in the specified direction of rotation. Bosch Rexroth documentation shows clockwise arrangements as the drawing reference and indicates that port locations change for counterclockwise versions.

Protect the Drive Shaft

During coupling installation, avoid transmitting excessive radial or axial loads to the pump shaft. Correct alignment and coupling installation are essential for shaft and bearing life.

Maintain Proper Inlet Conditions

The specified absolute pressure at the suction port is 0.7–3 bar. Restricted inlet piping, clogged filters, excessive oil viscosity or poor tank layout may cause cavitation, increased noise and reduced volumetric efficiency.

Do Not Treat Peak Pressure as Continuous Pressure

For the 1.0 cm³/rev AZPB configuration:

• 220 bar: maximum continuous pressure
• 250 bar: maximum intermittent pressure
• 270 bar: maximum pressure peak

The 270 bar value must not be interpreted as an allowable continuous operating pressure.

Use Suitable Hydraulic Fluid

Bosch Rexroth specifies HLP mineral oils complying with DIN 51524 and recommends a continuous operating viscosity of approximately 20–100 mm²/s, with an allowable continuous range of 12–800 mm²/s. The documented temperature range is approximately -30°C to +80°C for NBR seals and -10°C to +110°C for FKM seals.