CBK Series High Pressure Gear Pump | CBK1008 CBK1020 CBK1005

The CBK Series high-pressure micro-hydraulic gear pumps manufactured by Chengyuan Hydraulic are premium fluid power components specifically designed for compact hydraulic power packs, scissor lifts, and auxiliary mobile circuits. This highly adaptable series focuses on heavy-duty engineering optimization for models CBK1020-B3F, CBK1008-A1FR, and CBK1005-B4FR.

Operating as the reliable high-pressure matrix of micro-hydraulic systems, the CBK series integrates floating bush-bearing technology with automatic axial clearance compensation, maintaining an outstanding volumetric efficiency above 93% even under continuous pressures up to 250 bar. Replicated strictly to international OEM criteria, Chengyuan ensures 100% original-place interchangeability regarding mounting flanges, drive shafts, and ports. Every gear pump undergoes 100% simulated operational load testing before leaving the facility, certifying instant structural integration and zero-defect deployment under extreme pressure switching cycles.

Technical Specifications :

• Product Series: CBK High-Pressure Micro Gear Pump Series

• Model Configuration & Geometric Displacement:

  • CBK1005-B4FR: 0.5 $cm^3/rev$

  • CBK1008-A1FR: 0.8 $cm^3/rev$

  • CBK1020-B3F: 2.0 $cm^3/rev$

• Rated Continuous Pressure: 210 bar (21 MPa / 3045 PSI)

• Maximum Peak Intermittent Pressure: 250 bar (25 MPa / 3625 PSI)

• Permissible Rotation Speed Range: Minimum 600 rpm, Maximum 3500 rpm

• Rotation Direction Nomenclature:

  • R: Clockwise (Looking from the shaft end)

  • L: Counter-Clockwise (Looking from the shaft end)

  • F suffix/code: Denotes Rear/Face port orientation or specific mounting profiles

• Flange & Shaft Configurations (Per Code Matrix):

  • A1 / B3 / B4 options: Standard 2-bolt rhombic flanges, rectangular 4-bolt configurations, straight keyed shafts, splines, or tang/tongue drives.

• Fluid Medium Compatibility: Anti-wear mineral hydraulic oil (Viscosity range: 20-120 $mm^2/s$)

• Fluid Sanitation Threshold: Compliant with NAS Class 9 or ISO 4406 20/18/15 standards

Key Technical Advantages:

• High-Tensile Extruded Aluminum Housing: The primary pump body is extruded from a proprietary high-strength aluminum alloy compound. This advanced metallurgy prevents bore distortion and micro-cracking under repetitive 250 bar shocks, preserving strict mechanical alignment.

• Hydrostatic Axial Gap Compensation Bushings: Features specialized floating DU bush-bearings pressurized by internal pilot channels. This mechanism hydrostatically pushes the bushings against the gear faces to cancel out axial clearances caused by heat expansion, ensuring sustained volumetric efficiency over the product’s lifecycle.

• Precision-Honed High-Nickel Alloy Gears: Internal gear sets are forged from premium high-nickel-chromium steel bars, processed with precision CNC hobbing and micro-honing. The highly optimized gear teeth profile dramatically dampens mesh pulsation, lowering operating noise to $\le 60$ dB(A).

• Modular Interface Configuration Layout: The compact envelope of the CBK pump allows for absolute customization. Shafts (tang, keyed, splined) and fluid connections (side threaded, rear flange ports) can be configured modularly to fit into tight footprints inside small hydraulic power packs.

Application Areas:

• Mini Hydraulic Power Packs: Serving as the primary pressure core for automotive car lifts, dock levelers, material handling stackers, and tail-gate lifts.

• Sanitation & Municipal Equipment: Powers sweepers, small waste compactors, and auxiliary tipper cylinder loops.

• Industrial Automation Circuits: High-pressure power loops for CNC clamping fixtures and lightweight hydraulic workstations.

Expert Maintenance Tips:

• Rigid Rotation Code Verification: Double-check the prime mover’s drive direction before installation to ensure alignment with the pump’s spec tag (R for Clockwise / L for Counter-Clockwise). Running a unidirectional pump backward will instantly load the shaft seal with high pressure, causing a blowout.

• Alignment Tolerance Control: When utilizing a straight keyed or tang drive setup, ensure that the axial and radial alignment error between the motor shaft and pump shaft is restricted to $\le 0.05$ mm. Excessive run-out creates massive shear forces, resulting in rapid premature bearing wear.

• Compact System Temperature Threshold: Because micro-power units operate with a relatively small oil reservoir, temperature spikes are common. Ensure fluid temperatures remain below 80°C. If oil viscosity thins out due to excessive heat, fluid-film breakdown will induce cavitation noise and internal wear.