Description
Bucher QXEHX High-Speed Internal Gear Hydraulic Pump

QXEHX is Bucher’s high-speed successor to the QXEH family. The manufacturer describes an extended speed range, hydrodynamic lubrication and increased power density for dynamic operation. It is intended to support compact drive systems while maintaining operational reliability under suitable conditions.
This INTEREQ listing covers the Bucher Hydraulics QXEHX 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
| Brand | Bucher Hydraulics |
| Series / model codes | QXEHX32, QXEHX42, QXEHX52 and QXEHX62 frame families |
| Component | High-speed internal gear hydraulic pump |
| Design | Internal gear pump with optimized hydrodynamic lubrication for high-speed dynamic service and reversing drives. |
| Displacement | 10–160 cm³/rev across listed variants |
| Pressure | Up to 250 bar continuous and 280 bar intermittent, depending on model |
| Maximum speed | Up to 6,050 rpm on applicable variants |
| Hydraulic circuit | Open circuits; fixed- or variable-speed drives |
| Availability | Quotation on request; exact configuration and availability confirmed for the selected unit. |
Applications
Injection-moulding and plastics-processing machinery, hydraulic forming presses, machine tools, wind turbines, recycling presses, lift drives, die-casting machinery and hydraulic power units. 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 range covers multiple frame sizes and is designed for dynamic operation with reversing function. Maximum speed and pressure depend on model and displacement. Selected bolt-on valves and pipe flanges are listed as options. Verify the complete designation, drive, fluid, temperature, ports and duty cycle against the original data sheet before selection. 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
Hydraulic service parts and supply
For maintenance or repair of the Bucher QXEHX High-Speed Internal Gear Hydraulic Pump, 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 QXEHX family.
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