This hydraulic pump side plate is developed for high-pressure and heavy-load hydraulic systems.

It is suitable for continuous operation, frequent starts and stops, and working conditions with repeated pressure impact.

Alloy Material

The friction layer uses CuPb24Sn4 high-lead bronze. Its higher lead content provides improved lubricating performance.

Alloy Layer Thickness

The bronze alloy layer is 0.7–1.2 mm thick. This structure supports demanding high-pressure pump operation.

Pressure Capacity

The plate is rated for working pressure up to 35 MPa and peak pressure up to 42 MPa.

Its fatigue strength is at least 125 MPa, and the maximum working temperature is 280°C.

End-Face Precision

End-face flatness is controlled within 0.003 mm. Surface roughness is Ra 0.15 μm or better.

These specifications help limit deformation and support close contact in high-pressure pump structures.

Reduced End-Face Leakage

Compared with an ordinary bimetal side plate, the stated end-face leakage is reduced by more than 40%.

This supports higher volumetric efficiency and lower energy loss during pump operation.

Thermal Seizure Resistance

The material provides strong resistance to thermal seizure. Frequent pressure changes and start-stop cycles have less effect on the friction surface.

Application Areas

This hydraulic pump side plate is suitable for pressure compensation structures in high-pressure gear pumps and high-pressure vane pumps.

Typical applications include mining machinery, metallurgical equipment, and heavy construction machinery.

Factory Site

The factory owns a 16,000 m² site with 8,000 m² of building space.

It has more than 50 employees and annual production capacity of one million bimetal side plates.

Production Equipment

Production equipment includes three continuous sintering lines, 30 machining centers, 10 CNC lathes, 10 surface grinders, and two double-face grinders.

Twelve machining centers are imported from the United States.

Incoming Material Control

Raw materials are inspected before storage. Materials that do not meet the requirements are not accepted for production.

In-Process Inspection

Production controls include three checks on the first piece, scheduled patrol inspections, and management of nonconforming parts.

Finished products receive a final reinspection of geometric tolerances.

Commercial Terms

A six-month warranty is provided. Volume discounts are discussed for large orders.

The preferred trade term is EXW. Payment is 50% in advance before production and 50% before shipment.

Product Specifications

Parameter	Specification
Alloy Layer Material	CuPb24Sn4 high-lead bronze
Alloy Layer Thickness	0.7–1.2 mm
Working Pressure	Rated ≤35 MPa; peak 42 MPa
End-Face Flatness	≤0.003 mm
Maximum Working Temperature	280°C

Material Specifications

Layer	Material Grade	Strength Type	Strength (MPa)	Max. Linear Velocity (m/s)	Hardness (HB)	Remarks
Copper Alloy Friction Layer	CuPb10Sn10	Shear Strength	≥150	12	60–90	Surface coating available
Copper Alloy Friction Layer	CuPb7Sn7Zn3	Shear Strength	≥150	10	60–90	Surface coating available
Steel Substrate	SAE1010	Tensile Strength	≥365	-	90–130	Mild carbon steel
Steel Substrate	Q235B	Tensile Strength	370–500	-	90–130	Mild carbon steel
Steel Substrate	Q345B	Tensile Strength	490–675	-	110–170	Low-alloy steel

Hydraulic Pump Side Plate

Product Overview