CBKA Series High Pressure Hydraulic Gear Pump | CBKA-F4.2 CBKA-F2.1F CBK-F1.6-CLBL

The CBKA Series premium industrial fixed displacement mini hydraulic gear pumps manufactured by Chengyuan Hydraulic are high-efficiency fluid power components engineered to thoroughly match global machinery metrics. This compact aftermarket alternative product matrix covers high-demand mobile and manufacturing system profiles, encompassing standard fixed displacement units CBKA-F1.6, CBKA-F2, CBKA-F4.2, along with the specialized front-flange configuration CBKA-F2.1F and the bi-directional/complex return circuit model CBK-F1.6-CLBL.

Operating as the primary energy heart inside mini scissor lifts, commercial vehicle tailgate power packs, and machine tool work-holding setups, a miniature gear pump’s volumetric efficiency and internal oil seal tolerance govern system leak-free drift parameters. Chengyuan guarantees 100% original-place drop-in interchangeability across all assemblies concerning standard 2-bolt rhombic mounting flange dimensions, straight/tang drive shaft sizing, floating-bushing axial clearance tracking mechanisms, and internal threaded porting layouts. Prior to distribution, every single gear pump matrix is subjected to 100% full-capacity simulated pressure, maximum speed, and thermal slip verification tests on automated digital benches, ensuring continuous stability up to 25 MPa.

Technical Specifications 

• Primary Infrastructure Code: CBKA Series / CBK Series High Pressure Fixed Miniature Gear Pump

• Target Replacement Configurations: CBKA-F4.2, CBKA-F2.1F, CBKA-F1.6, CBKA-F2, CBK-F1.6-CLBL

• Geometric Displacement Matrix (Displacement):

  • F1.6 Variant: 1.6 $cm^3/rev$

  • F2.0 Variant: 2.0 $cm^3/rev$

  • F2.1 Variant: 2.1 $cm^3/rev$

  • F4.2 Variant: 4.2 $cm^3/rev$

• Rated Operating Pressure Threshold: 20 MPa (200 bar / 2900 psi)

• Maximum Allowable Peak Pressure: 25 MPa (250 bar / 3625 psi)

• Operational Drive Speed Range: 500 rpm – 3,500 rpm (High speed compatible profile)

• Shaft and Mounting Standard Footprint: Cylindrical keyed or tang drive setups matching standard 2-bolt rhombic configuration alignment pilots

• Factory Calibrated Volumetric Efficiency: $\ge 93\%$ (verified at rated 20 MPa pressure under 2,000 rpm test conditions)

• Total Assembly Structural Weight: Approx. 1.2 kgs to 1.8 kgs (Ultra-compact lightweight profile)

Key Technical Advantages:

• Anodized Black-Oxide High-Strength Extruded Aluminum Housing: The primary CBKA shell is sculpted from premium aerospace-grade forged aluminum alloy, formed under continuous heavy extrusion pressing. This structural architecture provides high resistance against housing expansion under 25 MPa peak hydraulic shock waves. The exterior features an anodized black-phosphate topcoat that resists corrosion from road debris or coastal salt spray.

• Floating Bushing Mechanics with Axial Hydrostatic Pressure Balancing: The inner rotating core leverages specialized floating bushings paired with imported premium DU composite self-lubricating bearings. High-pressure system fluid is precisely routed to the rear cavity of the bushing plates via a specialized ‘3’ or ‘8’ profile sealing track, maintaining a tight micron-level seal against the gear faces and keeping volumetric efficiency above 93%.

• Micro-Ground Nitrided Case-Hardened Alloy Steel Gear Shafts: The integrated drive and driven gears are cut from premium chromium-nickel alloy tool steel using micro-precision hobbing. Gear teeth profiles undergo vacuum induction-hardening and extended nitriding stabilization cycles to reach a depth profile of HRC 58-62. This meshing layout dampens fluid trapping pulsations, dropping average noise emission curves below 65 dB(A).

• Axially Compressed Envelope Optimized for Mini Power Packs: The entire manifold configuration implements a space-saving interior layout. By reducing total axial housing length by 20% compared to standard industrial Group 1 pumps, this setup slides seamlessly into the 110mm-130mm interior diameters of miniature hydraulic central reservoir blocks, maximizing available workspace.

Application Areas:

• Warehouse Logistics Material Handling Equipment: Powering vertical master lift rams on electric pedestrian walkies and driving miniature aerial work platform power units.

• Commercial Vehicle Tailgates & Mobile Dump Hoists: Managing hydraulic cantilevers on delivery box-truck tailgates and driving latch mechanisms on light utility dump bodies.

• Machine Tool Clamping Systems & Forced Lubrication Blocks: Supplying continuous pressure loops to high-speed CNC indexing lathe jaws and directing low-displacement forced fluid cooling streams through heavy industrial gearboxes.

Expert Maintenance Tips:

• Mandatory Manual Fluid Priming Prior to Motor Ignition: Because the CBKA series features tightly matched running clearances, operating it dry will cause immediate component damage. During initial system mounting or following a reservoir oil change, you must pre-fill the pump cavity with clean fluid through the suction port and rotate the input shaft 2-3 turns manually. Jog the motor intermittently during startup. Never run the pump dry, or the floating bushings and high-pressure nitrile shaft seals will fail from dry friction heat within seconds.

• Zero Shock Impact Tolerances Along the Input Drive Shaft: When securing the gear pump onto the electric motor adapter bracket, ensure the coupling, parallel key, or drive tang slides home smoothly. Never use a steel hammer or heavy tools to force the shaft coupling into position. Sudden axial impact loads can crack the internal bushing alignment tabs, causing instant mechanical binding. Keep alignment concentricity tolerances strictly under $\le 0.05mm$ to protect the front lip seals.

• Enforce Clean Fluid Filtration Matrix to Eliminate Internal Scoring: Miniature high-pressure gear components are vulnerable to fine particulate abrasive scraping. Total loop fluid cleanliness must be held at or above ISO 4406 21/19/16, backed by a $\le 100$ mesh inlet suction strainer that is inspected routinely. Allowing debris larger than 15 microns to bypass filtration will score the bushing faces, causing severe pressure drops when hot, accompanied by high-pitched acoustic squealing.