CBK Series Hydraulic Gear Pump | CBK-1006-A1FR CBK1012-B3FR | High Pressure Gear Pump

The CBK Series (along with CBW/CBN series) high-pressure gear pumps by Chengyuan Hydraulic are high-efficiency power sources engineered for small to medium-scale hydraulic power units. This range covers standard industrial models such as CBK-1006-A1FR, CBK1012-B3FR/L, and high-displacement models like CBN-F520-BFHL.

Featuring a high-strength extruded aluminum alloy casing and automatic axial clearance compensation technology, these pumps maintain lightweight properties while withstanding operating pressures up to 25MPa. Chengyuan ensures 100% original-place interchangeability regarding mounting flanges (A1, B3, etc.), shaft extensions (splined, keyed, or tang), and porting. Every unit undergoes 100% simulated load testing before delivery to ensure outstanding volumetric efficiency under continuous high-pressure output.

Technical Specifications 

• Compatible Series: CBK, CBW, CBN High-Pressure External Gear Pumps

• Core Models: CBK-1006-A1FR, CBK1012-B21R, CBN-E325, CBN-F316

• Geometric Displacement: 0.6 $cm^3/rev$ to 25 $cm^3/rev$ (depending on model)

• Rated Pressure: 20 MPa (200 bar)

• Max Pressure: 25 MPa (250 bar)

• Maximum Speed: 3000 – 4000 rpm

• Minimum Speed: 500 – 600 rpm

• Mounting Type: A1-Diamond / B2-Rectangular / B3-Square flange

• Shaft Type: F-Spline / P-Parallel Key / H-Tang Drive

• Rotation: R-Clockwise / L-Counter-clockwise

Key Technical Advantages:

• Automatic Axial Clearance Compensation: Utilizing specialized DU bushings and pressure-sensitive sealing, the axial clearance is automatically adjusted based on system pressure. This ensures the pump maintains over 93% volumetric efficiency even under high-temperature and high-pressure conditions.

• High-Strength Extruded Aluminum Body: The pump body is forged using high-density aluminum extrusion, providing exceptional tensile strength and deformation resistance against high-pressure pulsations.

• Precision-Rolled Hardened Gears: Gears are crafted from premium alloy steel with precision rolling and nitriding treatments. The high-accuracy tooth profile ensures smooth operation and significantly reduces mechanical friction and noise.

• Reinforced Composite Bearing System: Built-in composite bearings with high load capacity offer excellent wear resistance and self-lubricating properties, extending the fatigue life of the pump during frequent start-stop cycles.

Application Areas:

• Small Power Units (HPU): For lifts, tailgates, and compact presses.

• Agricultural Machinery: Tractor lift controls and harvester auxiliary steering.

• Industrial Automation: Automatic loading/unloading mechanisms and power sources for small machine tools.

Expert Maintenance Tips:

• Prevent Cavitation: Ensure the suction pipe diameter is sufficient to keep inlet pressure above -0.02MPa. Cavitation is the primary cause of abnormal noise and premature side-plate wear.

• Fluid Quality Control: Use 46# or 68# anti-wear hydraulic oil. Maintain a filtration level of ISO 4406 19/17/14 to protect the precision-engineered gear faces.

• Shaft Coupling Alignment: Never strike the shaft end during coupling installation. Maintain strict coaxiality between the shaft and the drive source (deviation $< 0.05mm$) to prevent radial stress that damages shaft seals.