CB-FC80 Hydraulic Gear Pump | 80cc 16MPa Flat Key Spline

Product Overview

The CB-FC80 is a large-displacement model in the CB-FC series high-pressure external gear pumps, featuring a displacement of 80 ml/r and a rated pressure of 16 MPa.

The CB-FC series high-pressure gear pumps are manufactured from high-strength cast iron materials, with gear tip sweeping for radial sealing and floating pressure-balanced side plates for axial sealing, delivering high efficiency. The pump features compact size, light weight, high efficiency, excellent performance, and reliable operation, making it widely used in construction machinery, mining equipment, lifting and transport machinery, building machinery, petroleum machinery, agricultural machinery, and other industrial applications.

The CB-FC80 features unidirectional rotation with either clockwise or counter-clockwise configurations available upon request. Shaft types include flat key and involute spline options, with mounting options including diamond flange and threaded connection, and pilot diameters available in φ85f8, φ90f8, and φ100f8.

Engineered as a direct OEM-replacement solution for CB-FC series original products, the CB-FC80 fully complies with CB-FC series original design standards and mounting interface specifications, offering 100% direct interchangeability with OEM pumps. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.

Model Code Breakdown (Bulleted List) :

• CB — Series: Gear Pump

• FC — Series identifier: High-pressure external gear pump series

• 80 — Displacement code: Nominal displacement 80 ml/r

• Shaft Type Options: 1 = Flat key / 2 = Involute spline / 3 = Rectangular spline

• Mounting Type Options: F = Diamond flange / L = Threaded connection

• Pilot Diameter Options: 85 = φ85f8 / 90 = φ90f8 / 100 = φ100f8

• Rotation Direction: Right-hand (standard) / X = Left-hand

Technical Specifications

• Model: CB-FC80

• Series: CB-FC High-Pressure External Gear Pump

• Theoretical Displacement: 80 ml/r

• Rated Pressure: 16 MPa

• Maximum Pressure: 20 MPa

• Rated Speed: Approx. 2000 r/min (reference from CB-FC series)

• Maximum Speed: Approx. 2500 r/min (reference from CB-FC series)

• Minimum Speed: 600 r/min

• Volumetric Efficiency: ≥ 90%

• Total Efficiency: ≥ 81%

• Shaft Type: Flat key / Involute spline / Rectangular spline (optional)

• Mounting Type: Diamond flange / Threaded connection (optional)

• Pilot Diameter: φ85f8 / φ90f8 / φ100f8 (optional)

• Rotation Direction: Right-hand (standard) / Left-hand (optional)

• Housing Material: High-strength cast iron

• Sealing: Floating pressure-balanced side plates (axial) + Gear tip sweeping (radial)

Key Technical Advantages

1. Floating Pressure-Balanced Side Plates – High Efficiency & Low Internal Leakage
The CB-FC series features floating pressure-balanced side plates for axial sealing, automatically adjusting the clearance between the side plates and gear end faces based on operating pressure to effectively reduce internal leakage. This design maintains high volumetric efficiency (≥90%) across the full operating pressure range.

2. Gear Tip Sweeping Radial Sealing – Compact Construction
The gear tip sweeping radial sealing design ensures effective sealing while simplifying the pump structure. Combined with the three-piece construction, the pump achieves compact size and light weight.

3. High-Strength Cast Iron Housing – Durable & Reliable
The pump housing is manufactured from high-strength cast iron materials, providing excellent fatigue strength and impact resistance. Particularly suitable for construction machinery, mining equipment, and other applications requiring extended operation under harsh conditions.

4. Flexible Configuration Options – Strong Adaptability
The CB-FC80 supports multiple shaft types (flat key / spline), mounting types (diamond flange / threaded connection), and rotation directions (clockwise / counter-clockwise). Users can select the optimal configuration based on specific application requirements.

5. Wide Speed Range – Compatible with Various Prime Movers
Speed range of 600 – 2500 r/min accommodates various prime mover conditions from low-speed electric motors to high-speed diesel engines.

6. 100% Factory Tested & Direct Interchangeability
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation. Fully compliant with CB-FC series original design standards, with flange dimensions, shaft specifications, and mounting interfaces identical to OEM pumps—direct drop-in replacement with zero modifications required.

Application Areas

The CB-FC80 high-pressure gear pump is widely used in the hydraulic systems of the following equipment:

• Construction Machinery: Excavators, loaders, bulldozers, and other mobile machinery hydraulic systems

• Mining Equipment: Mining machinery, crushing equipment hydraulic systems

• Lifting & Transport Machinery: Cranes, lift platforms hydraulic systems

• Building Machinery: Concrete pump trucks, road rollers, and other construction equipment

• Petroleum Machinery: Oil field service vehicle hydraulic systems

• Agricultural Machinery: Tractors, combine harvesters, and agricultural equipment

Expert Maintenance Tips

1. Model Confirmation
The CB-FC80 offers 80 ml/r displacement. The CB-FC series also includes CB-FC10 (10.44 ml/r), CB-FC16 (16.01 ml/r), CB-FC20 (20.19 ml/r), CB-FC25 (25.06 ml/r), CB-FC31.5 (32.02 ml/r), CB-FC40 (40 ml/r), and CB-FC50 (50 ml/r). Before installation, confirm the correct displacement based on system flow requirements.

2. Rotation Direction Confirmation
The standard CB-FC80 features right-hand rotation (clockwise, viewed from shaft end), with left-hand (counter-clockwise) available as an option. Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to prime and may cause severe damage to gears and bearings within a short period.

3. Installation Precautions

• Thoroughly clean the mounting flange and shaft mating surfaces before installation to ensure no debris remains

• Pilot diameter must match the host machine—options include φ85f8, φ90f8, and φ100f8

• Use specified torque values for mounting bolts—avoid over-tightening which may cause housing distortion

• Ensure correct connection of inlet and outlet ports—the inlet line must have no restrictions or sharp bends

4. First Start-Up and Bleeding

• Before first start-up, must fill the pump with hydraulic oil through the inlet port—never start dry

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system

• Check for abnormal noise or leakage

5. Fluid and Filtration

• Use high-quality anti-wear hydraulic oil compliant with standards

• Maintain system oil cleanliness to ISO 4406 18/15 or better

• Maintain operating temperature within recommended range

• Regularly replace return line filters to prevent contaminants from entering the pump

6. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor system operating pressure—not to exceed 16 MPa rated pressure (20 MPa peak)

• If flow output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly