Bucher Hydraulics Motors

Bucher Hydraulics motors cover external gear motors, internal gear units that can run as a pump or a motor, high-speed and mobile internal gear motors, and high-efficiency AX axial piston motors.

The range of Bucher hydraulics motors suits mobile and industrial applications from fan drives to winches, presses and electrified machines.

Bucher internal gear units are known for very low noise levels, below 75 dB(A), and their symmetrical design allows multi-quadrant operation, so a unit that lifts a load as a pump can recover energy as a motor while lowering it.

Bucher Hydraulics Motor Range

External Gear Motors

  • APM212 and APMR212: 4 to 26.2 cm³/rev, 250 bar continuous, 300 bar peak, up to 4,000 rpm.
  • APM212HP and APMR212HP: 1 to 26.2 cm³/rev, 250 bar continuous, 300 bar peak, up to 3,500 rpm.
  • APM250HP and APMR250HP: 2 to 54 cm³/rev, 300 bar continuous, 320 bar peak, up to 3,500 rpm.

APM motors have an aluminium or cast-iron housing with plain bearing gears, a shaft seal designed to cope with back pressure, and SAE, British or German front flanges. They are available unidirectional (APM) or reversible (APMR), with an integral anti-cavitation valve and an outrigger bearing for axial and radial loads.

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, in open or closed circuits. Maximum motor speeds from 3,400 rpm (QXM8) to 6,000 rpm (QXM2). Can be used with all hydraulic fluids and with fixed or variable speed drives.
  • 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. Pinion shaft technology builds pressure in a single stage, and the direction of rotation can be reversed in milliseconds. Maximum motor speeds from 3,500 to 6,000 rpm.

Internal Gear Motors

  • QXM-HS (High Speed): 20, 25 and 32 cm³/rev, 240 bar continuous, 280 bar peak, from 100 up to 10,500 rpm. Very low losses and noise, carries high external radial loads, with a special motor flange and integral ports for auxiliary functions.
  • QXM-Mobil: QXM12 and QXM22 sizes from 2.5 to 8 cm³/rev, 210 bar, up to 6,000 rpm. Integrated front bearing and external leakage drain for protection against shaft seal leakage, with clockwise, anticlockwise and bi-directional versions. Suction, relief and flow control valves, speed sensors and leakage indicators can be integrated.

Axial Piston Motors

  • AXFM: 18 to 76 cm³/rev, 450 bar continuous, 500 bar peak, up to 5,000 rpm. Overall efficiency of 92 to 94% and start efficiency of 99%, with no minimum speed limit, low pulsation and low noise. Well suited to variable speed electric drives and battery-powered machines.

Further sizes and options are available beyond those listed here.

Typical Applications

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

  • Agricultural, construction and harvesting machinery
  • Fan, blower and generator drives on mobile machines
  • Winches, slew drives, wheel drives and track drives
  • Saw drives on forestry harvesters
  • Injection moulding machines, hydraulic presses and die casting machines
  • Elevator drives, wind turbines and electrified machines with energy recovery

Our website shows a selection of the Bucher Hydraulics motors 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’ll be able to help. 

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