Gear Pump Assembly 2

Our hydraulic gear pumps size 2 (HM2) efficiently convert mechanical energy into the required pressure and flow for your applications. These robust HM2 pumps are designed for displacements from 4 to 32 cm³ and achieve nominal pressures from 160 to 250 bar, depending on the respective displacement. Learn more about our size 2 gear pumps in our FAQs.

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hydraulic gear pump group 2 ccm 4 front
Hydraulic Gear Pump, Group 2, SAE A Flange, Splined Shaft 9T, Selectable Displacement 4 to 27.9 ccm/REV, Rotation right
  • group 2
  • selectable displacement from 4 to 27.9 ccm/REV
  • shaft: splined 9T
  • side ports: flange connection, BOSCH
  • SAE A flange
  • rotation direction: right
146,25 EUR
125,00 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
125,00 EUR excl. 17% tax
gear pump group 2 ccm 6 din flange version front
TOP
Hydraulic Gear Pump, Group 2, Conical Shaft 1:8, European Version, Selectable Displacement 4 to 32 ccm/REV, rotation right
  • group 2
  • selectable displacement from 4 to 32 ccm/REV
  • European flange  (71,5 mm x 96,1 mm)
  • centering Ø 36,5mm
  • rotation direction: right
  • shaft: conical 1:8
  • Side ports: european version
132,74 EUR
113,45 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
113,45 EUR excl. 17% tax
Picture1 Hydraulic Gear Pump, Group 2 HM2-25-3333-C
-14%
Hydraulic Gear Pump, Group 2, Conical Shaft 1:8, European Version, Displacement 25 ccm/REV, rotation right, with flange
SPECIAL OFFER!
 
  • Group 2 BG2
  • Displacement 25 cm³/rev
  • Euro flange  (71.5 mm x 96.1 mm)
  • Centring Ø 36.5mm
  • Shaft: conical 1:8
  • Rotation direction: clockwise
  • Lateral connections with flange: suction side 1" BSP, pressure side 3/4" BSP
our standard price 115,83 EUR
Only 98,99 EUR
84,61 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
84,61 EUR excl. 17% tax
hydraulic gear pump group 2 ccm type 4 55 front
Hydraulic Gear Pump, Group 2, DIN-Flange (Type 4), Conical Shaft 1:5 (type D), Selectable Displacement 4 to 27.9 ccm/REV, rotation left
  • group 2
  • selectable displacement from 4 to 27.9 ccm/REV
  • DIN flange (60 mm x 60 mm)
  • centering: 50 mm
  • conical shaft 1:5
  • drill holes 2 x Ø 11 mm
  • connection ports: DIN
  • rotation direction: left
146,25 EUR
125,00 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
125,00 EUR excl. 17% tax
hydraulic gear pump group 2 ccm type 4 55 front
Hydraulic Gear Pump, Group 2, DIN-Flange Type 4, Conical Shaft 1:5 (type D), Selectable Displacement 4 to 27.9 ccm/REV, rotation right
  • group 2
  • selectable displacement from 4 to 27.9 ccm/REV
  • DIN flange (60 mm x 60 mm)
  • centering: 50 mm
  • conical shaft 1:5 (type D)
  • drill holes 2 x Ø 11 mm
  • connection ports: DIN
  • rotation direction: right
146,25 EUR
125,00 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
125,00 EUR excl. 17% tax
gear pump group 2 ccm 11 din left flange front
Hydraulic Gear Pump, Group 2, DIN-Flange Type 5, Centering Ø52mm, Conical Shaft 1:5, Selectable Displacement 4 to 27.9 ccm/REV, rotation left
  • group 2
  • selectable displacement from 4 to 27.9 ccm/REV
  • DIN flange type 5 (60 mm x 60 mm, 2 x Ø 11 mm)
  • Centering Ø52mm
  • shaft: conical 1:5, Bosch (type 1)
  • side ports: DIN version
  • rotation direction: left
146,25 EUR
125,00 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
125,00 EUR excl. 17% tax
gear pump group 2 ccm 11 din left flange front
Hydraulic Gear Pump, Group 2, DIN-Flange Type 5, Centering Ø 52mm, Conical Shaft 1:5 (type 1), Selectable Displacement 4 to 27.9 ccm/REV, rotation right
  • group 2
  • selectable displacement from 4 to 27.9 ccm/REV
  • DIN flange type 5 (60 mm x 60 mm, 2 x Ø 11 mm)
  • Centering Ø 52mm
  • shaft: conical 1:5, Bosch (type 1)
  • side ports: DIN version
  • rotation direction: right
146,25 EUR
125,00 EUR excl. 17% tax
incl. 17% tax excl. Shipping costs
125,00 EUR excl. 17% tax
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Thanks to their simple design and attractive price level, our size 2 gear pumps are ideal for a wide range of hydraulic systems in industry, agriculture, and construction machinery. We offer single, double, and multiple pumps, including bidirectional versions, for flexible application possibilities.

 

HM2 Gear Pumps – Frequently Asked Questions

What inlet pressure can the pumps operate with continuously and what is the maximum permissible inlet velocity?

HM2 gear pumps can operate continuously with an inlet pressure between -0.2 and 0.5 bar. The maximum inlet velocity of the fluid is 2.5 m/s. Under these conditions, the pumps reliably achieve the outlet pressure specified in the catalog.

Can HM2 gear pumps be customized to specific customer requirements?

Yes, on request, HM2 gear pumps can be equipped with pressure or priority flow control valves to meet specific customer requirements. This allows more flexible integration into various hydraulic applications and optimal adaptation to your system requirements.

How is the part number of an HM2 gear pump structured and what information does it provide?

The part number of an HM2 gear pump is a code that encodes various specifications of the pump:

  • Group (1): Always starts with "HM2"
  • Displacement (2): Specifies the displacement in cm³ (e.g. 4, 10, 22, 32)
  • Shaft (3): Describes the shaft type (e.g. 3 for tapered 1:8, A for splined 9T.16/32, D for tapered 1:5, 1 for tapered 1:5)
  • Flange (4): Specifies the flange type (e.g. 3 for European (4xØ9), 7 for SAE A, 4 or 5 for DIN 60x60)
  • Suction and pressure ports (5): Defines the type of connections (e.g. 3 for European, 1 for BSP thread, 2 for DIN)
  • Rotation (6): Indicates the direction of rotation (C for clockwise, A for counterclockwise)

This coding allows precise selection of the appropriate pump for the specific application.

What different types of HM2 gear pumps are offered?

We offer various types of HM2 gear pumps that differ in their technical specifications such as connection type, flange type, and dimensions. Examples include:

  • HM2-3333-C/A: Standard configuration with European ports
  • HM2-3311-C/A: European flange with BSP threaded ports
  • HM2-3133-C/A-DBV: With integrated pressure relief valve
  • HM2-A722-C/A: Splined shaft with SAE A flange
  • HM2-D422-C/A: Tapered shaft 1:5 with DIN flange
  • HM2-1522-C/A: Tapered shaft 1:5 with DIN ports

Each of these types is designed for specific applications or configurations.

How does the displacement affect the technical specifications of HM2 gear pumps?

The displacement has a direct impact on the maximum nominal pressure and nominal speed of HM2 gear pumps. A clear correlation can be observed:

  • Smaller displacements (4–9 cm³): Allow a higher nominal pressure of 250 bar and a maximum speed of 3500 rpm
  • Medium displacements (10–17 cm³): Nominal pressure decreases to 200 bar and maximum speed to 3000 rpm
  • Larger displacements (25–32 cm³): Nominal pressure is 160 bar, maximum speed is 2000 rpm

Pumps with smaller displacement are suited for applications requiring higher pressure and higher speeds, while larger pumps are intended for applications with higher flow rates but lower pressure.

What types of ports and shafts are available for HM2 gear pumps?

HM2 gear pumps offer a variety of port and shaft options to meet different installation and application requirements:

Shaft options:

  • Tapered shafts (1:8 and 1:5)
  • Splined shafts (9T.16/32)

Flange options:

  • European flanges (4xØ9)
  • SAE A flanges
  • DIN 60x60 flanges

Port types (suction and pressure):

  • European ports
  • BSP threaded ports
  • DIN ports

Specific dimensions vary depending on displacement and pump type.

What does the designation "DBV" mean for HM2 gear pumps?

The designation "DBV" stands for pressure relief valve. Pumps with this designation (e.g. HM2-3133-C/A-DBV) are equipped with an integrated pressure relief valve. This safety valve protects the hydraulic system against overpressure by automatically opening when the set maximum pressure is reached and diverting excess oil back to the tank.

What are the advantages of pressure and priority flow control valves on HM2 pumps?

Pressure control valves allow constant pressure maintenance in the system regardless of load or speed fluctuations. Priority flow control valves ensure that critical consumers in the system are supplied with hydraulic oil first.

These additional features offer the following benefits:

  • Improved system stability and precision
  • More energy-efficient operation
  • Protection against system overload
  • Optimized power distribution with multiple consumers