Eaton 6423-518 Hydraulic piston pump

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Product details

Eaton 6423‑518 Hydraulic Piston Pump

Product Overview

Series: 6423 Series ACA Variable Displacement Piston Pump, designed for closed‑circuit hydrostatic drive systems, widely used in concrete mixers and agricultural machinery.

Model No.: 6423‑518 with standard control code ‑518.

Core Technical Specifications

- Displacement: 105.5 cm³/r (6.44 in³/r)

- Continuous Rated Pressure: 420 bar (6000 psi)

- Peak Pressure: 480 bar (7000 psi)

- Maximum Speed: 3720 rpm (at 18° swashplate angle)

- Output Flow: Approx. 375 L/min (99.1 gpm) @ 241 bar

- Input Torque: Approx. 441 Nm (3900 lbf‑in) @ 3500 psi

- Weight: Approx. 38–40 kg (84–88 lb)

- Control Type: Pressure compensation plus load‑sensing control (standard for ‑518 version)

- Rotation: Bi‑directional (clockwise / counter‑clockwise configurable)

Structure & Port Configuration

- Type: Variable displacement axial piston pump for closed‑circuit systems

- Housing: High‑strength cast iron with low noise and high rigidity

- Swashplate: High‑strength construction, resistant to high‑pressure deformation

- Charge Pump: Integrated gear‑type charge pump, charge pressure: 16–25 bar

- Main Service Ports: SAE #16 flange (1‑5/16‑12 thread)

- Drain Port: SAE 7/16‑20 UNF thread

- Mounting Flange: Compliant with SAE J744 standard

Key Features

- High‑pressure heavy‑duty performance: 420 bar continuous pressure and 480 bar peak pressure, suitable for heavy‑load closed‑circuit hydraulic systems

- High efficiency & energy‑saving: Variable displacement control delivers flow on demand, reducing energy consumption and heat generation

- Long service life: V‑groove valve plate design ensures excellent wear resistance and high volumetric efficiency

- Wide application range: Mainly used for concrete mixers, harvesters, pavers, drilling rigs, mining machinery and other heavy‑duty equipment

112-1089-006 Hydraulic Orbit Motor: Technical Analysis and Applications in Hydraulic Systems

1. Product Positioning and Core Functions

The112-1089-006 Hydraulic Orbit Motoris a high-performancehydraulic orbit motor, a specialized type ofhydraulic motordesigned for low-speed, high-torque applications withinhydraulic systems. Its primary function is to convert hydraulic energy (pressure and flow) from a hydraulic pump into mechanical energy (torque and rotational speed), enabling precise and stable rotational motion of loads.

This model employs agerotor design(internal gear ring meshing with an external gear) combined with planetary reduction principles to form sealed volume chambers, achieving low-speed, high-torque output. Its compact structure, small size, and lightweight design allow direct integration into hydraulic systems without additional reduction gears, significantly simplifying the transmission mechanism.

2. Technical Specifications and Performance Advantages

【表格】

Parameter Category Typical Values for 112-1089-006 Industry Comparison Advantages

Displacement 50–1250 mL/rev (customizable) Covers light- to heavy-duty scenarios with broad adaptability

Rated Pressure 20–25 MPa (peak pressure up to 30 MPa) Stable operation under high-pressure conditions with strong shock resistance

Torque Output Continuous torque ≥500 N·m (peak torque ≥800 N·m) Far exceeds torque output of same-displacement gear motors, meeting heavy-load startup demands

Speed Range 0–500 rpm (exceptional low-speed stability) Avoids high-speed vibrations, suitable for precision control applications

Efficiency Volumetric efficiency >85%, mechanical efficiency >90% Low energy loss, minimal heat generation, extended service life

Structural Features Double-tapered roller bearings, end-face oil distribution design Strong resistance to radial/axial forces with automatic wear compensation

3. Applications in Hydraulic Systems

The112-1089-006 Hydraulic Orbit Motoris widely used in the followinghydraulic systemscenarios, leveraging its low-speed, high-torque characteristics to address limitations of traditional motors:

1. Construction Machinery

• Rotary mechanisms in excavators/loaders: Replaces conventional motors for smooth, vibration-free low-speed rotation, enhancing operational precision.

• Log grabber/clamshell bucket drives: Models like Shanghai Shuangxu’sBH-630 Hydraulic Motor(630 mL/rev displacement, 25 MPa rated pressure) are tailored for timber handling, delivering high torque with excellent low-speed stability.

2. Marine Machinery

• Steering gears and deck cranes: Maintains stable torque output under wave impact, ensuring precise course control.

3. Industrial Equipment

• Injection molding machine mold opening/closing: Provides sustained high torque to prevent mold deformation, improving product quality.

• Metallurgical rolling mill drives: Multi-stage planetary transmission supports extremely low speeds matched with ultra-high torque, meeting rolling process requirements.

4. Agricultural Machinery

• Threshing drum drives in combine harvesters: Adapts to dusty environments with low-speed, high-torque performance to prevent blockages.

4. Technical Comparison and Selection Guidelines

【表格】

Characteristic Hydraulic Orbit Motor Gear Motor Vane Motor

Torque Output High torque density, strong heavy-load startup capability Torque pulsation issues, prone to stalling at low speeds High-speed, low-torque performance; efficiency drops at low speeds

Efficiency Volumetric efficiency >85%, low mechanical losses Poor sealing, low volumetric efficiency High leakage, unstable at low speeds

Structural Compactness Small size, direct load connection Requires additional reducers, bulky Complex structure, high inertia

Typical Applications Heavy-duty rotation, low-speed operations High-speed, light-duty tasks (e.g., fan drives) Frequent reversal scenarios in automation equipment

Selection Recommendations:

• Prioritize the112-1089-006 Hydraulic Orbit Motorfor systems requiringlow-speed, high-torque stability(e.g., log grabbers, steering gears).

• Opt for gear or vane motors forhigh-speed, light-duty applications(e.g., fan drives) to reduce costs.

5. Industry Case Studies and Validation

• Mine Hoist Application: A gerotor motor with 25 MPa rated pressure and 99 mL/rev displacement delivered stable 385 N·m torque, resolving high-load startup shock issues and extending equipment lifespan by 30%.

• Injection Molding Integration: A modular design integrated the motor, brake, and planetary gearbox into a drum, achieving a total displacement of 3620 mL/rev and 7885 N·m torque for metallurgical rolling mills requiring high reduction ratios.