Gear oil pump QX Series QX51-100/21-010R

Product Description

Hengmeisi's Gear oil pump QX Series QX51-100/21-010R tandem internal gear pump – a perfect replacement for Bucher's QX series – outperforms standard single pumps with its 100cc/10cc dual sections, delivering exceptional power density, smooth operation, and long life for heavy-duty hydraulics.

Product Advantages

Tandem Dual-Displacement vs. Single Gear Pump Designs

Unlike traditional single gear pumps with limited flexibility, the QX51-100/21-010R uses a split-flow tandem design. The 100cc main pump handles high-volume, low-pressure tasks, while the 10cc auxiliary pump provides precise, low-volume high-pressure control. This eliminates the need for two separate pumps, reducing system complexity, cost, and energy consumption.

Low-Pulsation Internal Gear Technology

Featuring precision-machined internal gear pairs, the QX51-100/21-010R operates with significantly lower flow pulsation and noise compared to external gear pumps. The smooth meshing action reduces vibration and stress on system components, ensuring quiet operation and consistent performance in sensitive control circuits.

Industrial-Grade Materials for Maximum Durability

• Gear Set: High-strength alloy steel, case-hardened and precision-ground for wear resistance and long life.

• Housing: High-pressure cast iron with optimized flow paths to minimize turbulence and cavitation.

 •Seals & Bearings: High-temperature-resistant seals and heavy-duty bearings, rated for continuous operation up to 3500 r/min and pressures up to 330bar peak.

Optimized Contamination & Temperature Resistance

The QX51-100/21-010R is designed to operate reliably even in less-than-ideal conditions. Its robust filtration features protect internal components from hydraulic fluid impurities, while the wide temperature tolerance ensures stable performance in both freezing and high-temperature industrial environments.

Model Code Explanation

The QX51-100/21-010R naming convention provides clear, at-a-glance specifications:

QX51: Series identifier for high-pressure tandem internal gear pumps.

100/010: Dual displacements (100cc/rev main pump, 10cc/rev auxiliary pump).

R: Right-hand rotation, compatible with standard system configurations.

This model is the flagship of the QX51 series, optimized for heavy-duty, continuous-cycle applications. It is widely trusted by global buyers in material handling, heavy machinery, and industrial automation.

Product Structure

1.Core Architecture: Tandem Internal Gear Design

The pump consists of two integrated gear stages sharing a common drive shaft. This compact, single-unit design provides two independent flow outputs from one power source, saving installation space.

2.Precision Manufacturing:

Gears are cut to micron-level tolerances, ensuring minimal internal leakage and maximum efficiency. The internal flow paths are optimized to reduce turbulence, improving overall system response.

3.Material Upgrades:

The pump body is constructed from high-grade cast iron for superior rigidity and vibration damping. The gear teeth are heat-treated to a high hardness to resist wear under high loads.

4.Integrated Protection:

Built-in pressure relief and anti-cavitation features protect the pump from damage caused by system spikes or aerated fluid.

Application Scenarios

Heavy Construction Equipment: Hydraulic power for excavators, loaders, and cranes requiring both high flow and precise control.

Industrial Hydraulic Power Units: Ideal for presses, injection molding machines, and large-scale manufacturing lines.

Material Handling: Forklifts and lift trucks that need efficient power for both lifting and steering functions.

Agricultural Machinery: Tractors and harvesters with multiple hydraulic implements requiring variable flow rates.