Bucher Hydraulics Pumps

Bucher Hydraulics pumps cover AP external gear pumps for mobile machinery, QX series internal gear pumps for industrial and mobile hydraulics, specialist internal gear pumps for servo drives, low-viscosity fluids and precision metering, internal gear units that work as a pump or a motor, and AX axial piston pumps for electrified machines.

Bucher internal gear pumps are known for very low noise, below 75 dB(A), and low pulsation, and many are suited to variable speed drives. Single, tandem and multiple pump combinations are available.

Bucher Hydraulics Pump Range

External Gear Pumps

  • AP Series: Single pumps in groups 05, 1, 2, 2.5 and 3, and double and triple combinations, with integral flow or pressure control valves and outrigger bearings for axial and radial loads.
  • AP05 and APR05 (Aluminium): 25 to 1.6 cm³/rev, 190 bar, 230 bar peak, up to 7,000 rpm.
  • AP100 (Aluminium): 2 to 10 cm³/rev, 210 bar, 280 bar peak, up to 5,000 rpm.
  • AP212 and APR212 (Aluminium): 4 to 27.1 cm³/rev, 250 bar, 300 bar peak, up to 4,000 rpm.
  • AP212HP and APR212HP (Cast Iron): 1 to 34.1 cm³/rev, 250 bar, 300 bar peak, up to 3,500 rpm.
  • AP250HP and AP250FP (Cast Iron): 2 to 54 cm³/rev, 300 bar, 320 bar peak, up to 3,500 rpm.
  • AP312HP (Cast Iron): 40 to 75 cm³/rev, 300 bar, 320 bar peak, up to 3,000 rpm.
  • Bucher Hydraulics Wuxi Gear Pumps: Gear pumps from the Bucher Hydraulics plant in Wuxi, China, including CB-E small displacement pumps with aluminium bearing blocks, CB-E**S* bidirectional pumps with two check valves in the rear cover, and CBKA and CBKL pumps with automatic axial clearance compensation for high efficiency and low noise.

Internal Gear Pumps

  • QX Series: The fifth generation of Bucher internal gear pumps, in sizes QX2 to QX8 from 3 to 450 cm³/rev, at 320 to 360 bar continuous and 400 bar intermittent. A special gear profile gives extremely low pulsation and noise even at high pressures and speeds. Tandem and multiple pumps, bolt-on valves and pipe flanges are available.
  • QXEH Series: Single stage pumps for highly dynamic servo drives with reversing, in sizes QXEH32 to QXEH82 from 10 to 250 cm³/rev, at 250 bar continuous and 280 bar intermittent. Available as double pumps.
  • QXEHX Series: The successor to the QXEH, with optimised lubrication and speeds up to 6,050 rpm, in sizes QXEHX32 to QXEHX62 from 10 to 160 cm³/rev, at up to 250 bar continuous and 280 bar intermittent. Suited to downsizing drive trains on injection moulding and die casting machines.
  • QYEH Series: Reversible single stage units for variable speed drives, in sizes QYEH32 to QYEH62 from 10 to 125 cm³/rev, at 250 bar continuous and 280 bar intermittent, with only two moving parts and low noise. Double units are available.
  • QXV Series: For low-viscosity fluids from 0.8 to 10 mm²/s, such as kerosene, fuels, paraffin and brake fluids, in sizes QXV2 to QXV8 from 5 to 500 cm³/rev, at up to 250 bar and temperatures up to 160°C. Available in explosion proof versions to EX II 3 G T3 and T4.
  • QXP Series: Metering pumps for polyurethane production, handling fluids such as polyol and isocyanate, in sizes QXP2 to QXP8 from 3 to 500 cm³/rev at up to 250 bar. Hydrodynamic and hydrostatic ring gear bearings allow operation at low speeds and very high viscosities.

Internal Gear Units for Pump and Motor Service

  • QXM: Sizes QXM2 to QXM8, 5 to 500 cm³/rev, 320 bar continuous and 400 bar intermittent, for open and closed circuits and multi-quadrant operation with energy recovery.
  • QXEM: Sizes QXEM2 to QXEM8, 5 to 250 cm³/rev, 210 bar continuous and 250 bar intermittent, for highly dynamic variable speed multi-quadrant operation.

Axial Piston Pumps

  • AX Series: Sizes AX24, AX48, AX76 and AX122, covering 18 to 122 cm³/rev with custom displacements possible within each size, at 450 bar continuous and 500 bar peak. Up to 96% overall efficiency, no minimum speed and up to 99% starting torque at 0 rpm. Single quadrant, 2Q and 4Q versions with energy recovery, and tandem combinations.

Further sizes, combinations and options are available beyond those listed here; our team can help with any Bucher Hydraulics pump you need.

Typical Applications

Bucher Hydraulics pumps are used in mobile and industrial hydraulics, including:

  • Tractors, agricultural, earth moving and construction machinery
  • Forklifts, sweepers and hoists
  • Hydraulic presses, machine tools and waste compactors
  • Injection moulding, plastics processing and die casting machines
  • Elevator drives and hydraulic power units
  • Electric mobile machines and electro-hydraulic power take-offs
  • Fuel and test systems for low-viscosity fluids, and polyurethane metering

Our website shows a selection of the Bucher Hydraulics pumps we supply. If you cannot find what you need or would like impartial advice on the right specification for your application, please contact our team; we source globally and will still be able to help.

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