Product Overview
The REXROTH 0510112321 is a high-performance external gear pump engineered by Bosch Rexroth for demanding industrial hydraulic systems. As a fixed-displacement rotary pump, it operates on the external gear principle: two precision-machined, intermeshing spur gears rotate within a close-tolerance housing, trapping hydraulic fluid between the gear teeth and the casing wall and displacing it from the suction port to the pressure port. This positive-displacement action delivers a smooth, continuous flow proportional to drive speed, making the 0510112321 an ideal solution for systems requiring dependable flow delivery, compact installation, and long service life. Its robust construction and proven gear geometry make it a direct-fit replacement for OEM Rexroth external gear pump installations across a wide range of industrial machinery.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | External Gear Pump (Fixed Displacement) |
| Model Designation | REXROTH 0510112321 |
| Operating Pressure | Standard Industrial Grade (Up to rated bar per Rexroth gear pump series) |
| Mounting & Connection | Standard ISO / Manufacturer Interface (SAE flange or threaded ports) |
Engineering Features & Advantages
- Precision Gear Performance: Hardened, precision-ground spur gears and close-tolerance casing clearances ensure high volumetric efficiency, stable flow output, and minimal internal leakage across the operating range.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with durable bearing and shaft support designed to withstand sustained pressure loading and high duty cycles.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM Rexroth external gear pump standards, enabling straightforward drop-in installation without modification.
- Compact & Robust Design: Space-efficient external gear construction with a rigid housing that resists deformation and maintains gear alignment for consistent long-term performance.
- Low Noise Operation: Optimized gear tooth geometry and flow channel design reduce pressure pulsation and operating noise for improved workplace conditions.
Typical Industrial Applications
The REXROTH 0510112321 external gear pump is widely deployed in plastic injection molding machines, metallurgical presses and rolling mills, construction and marine hydraulic systems, CNC machine tools, and general industrial power units where reliable fixed-displacement flow delivery is essential.
PRODUCT IMAGES

REXROTH 0510112321 External Gear Pump
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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