Bucher QXM Multi-Quadrant Internal Gear Pump and Motor Unit

Description

Bucher QXM Multi-Quadrant Internal Gear Pump and Motor Unit

The QXM extends Bucher’s QX internal gear technology for both pump and motor operation. Its symmetrical design supports multi-quadrant systems, including configurations that recover energy during load-driven motion. Performance and control depend on the machine circuit and selected unit.

This INTEREQ listing covers the Bucher Hydraulics QXM product family for identification, replacement enquiries and quotation support. Its product image is an original family illustration and does not depict a confirmed part number or selected configuration. Options and limits vary within a series; confirm the complete manufacturer code before ordering.

Technical specifications

Applications

Hydraulic presses, injection-moulding machines, flight simulators, fan drives, wind turbines, lift drives, winches and marine systems, when engineered for the corresponding operating mode. Final suitability depends on the machine, hydraulic circuit, duty cycle and installed component configuration. Check the equipment documentation and the manufacturer’s current data before specifying a replacement.

Key features and compatibility

The manufacturer lists low noise, compatibility with a range of hydraulic fluids and use with fixed- or variable-speed drives. QXM models range from 5 to 500 cm³/rev; pressure and speed differ by frame. Confirm whether pump, motor or regenerative service is intended, plus rotation, mounting, ports and full code. Interfaces are model-specific. Do not assume that units sharing a series name have matching shafts, flanges, ports, rotation, controls or seals. Published family ranges are identification guides and must not be treated as ratings for every size or combination.

Model identification and replacement selection

Do not select a replacement by brand and series alone. Compare the full nameplate code and confirm displacement, rotation, shaft, mounting flange, port arrangement, controls, case-drain requirements and hydraulic circuit against the installed unit and machine documentation. Send INTEREQ a clear nameplate photo and machine make/model for identification.

For a quotation, provide the full type code, machine model, operating conditions and any available drawing or nameplate image. Condition, availability and technical fit are confirmed for the specific unit offered.

System sizing and replacement check

For system sizing, compare pump displacement and shaft speed with the required flow, then check continuous and intermittent pressure against the machine duty cycle. Confirm inlet conditions, fluid viscosity and cleanliness, operating temperature, case pressure where applicable, drive power and external shaft loads. These conditions affect performance and service life; a series maximum is not an operating target for every unit.

When the installed type code is incomplete, include clear photos of the nameplate, mounting face, shaft and port layout. Provide the machine make/model, current circuit details and operating conditions so the replacement can be checked against the correct manufacturer data sheet.

Related Bucher Hydraulics product families

• QX standard pumps
• QXEM dynamic pump/motor units
• QXM-HS high-speed motors

Hydraulic service parts and supply

For maintenance or repair of the Bucher QXM Multi-Quadrant Internal Gear Pump and Motor Unit, INTEREQ can source and supply compatible hydraulic service parts, including pumps, motors, control valves and related components. We check the complete type code, machine or system application, compatibility and availability before quotation.

Browse all Hydraulic Pumps & Motors or view Bucher hydraulic products.

Manufacturer reference: Bucher Hydraulics product information for the QXM family.

For pricing, availability, inspection details and international delivery options, please contact us using the inquiry form below.