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Custom ODM/OEM JF-800 Bi-metal Bearing

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Focus on the research and development and production of various new self-lubricating bearings such as JF-800 Bi-metal Bearing.
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JF-800 Bi-metal Bearing Manufacturers

JF bimetallic composite bearing utilizes premium low-carbon steel as its base material, with a wear-resistant layer formed by sintering low-friction copper alloys (including CuSn6.5P0.1, CuPb10Sn10, CuSn8Ni, CuPb24Sn4, and AlSn20Cu) onto the surface.

To accommodate applications where continuous lubrication or relubrication is challenging, various lubrication features such as grooves, holes, and pockets can be machined into the copper alloy surface according to operational requirements. This material achieves excellent bonding strength and optimal load-bearing performance through a dual-stage process involving repeated sintering and extrusion.

Zhejiang Shuangnuo Bearing Technology Co., Ltd. Zhejiang Shuangnuo Bearing Technology Co., Ltd.
Zhejiang Shuangnuo Bearing Technology Co., Ltd.
Zhejiang Shuangnuo Bearing Technology Co., Ltd. is China JF-800 Bi-metal Bearing Manufacturers and Custom ODM/OEM JF-800 Bi-metal Bearing Factory, we are a manufacturer specializing in producing various self-lubricating copper alloy products using centrifugal casting, continuous casting, metal mold casting, and other processes. Its main products include brass, aluminum bronze, tin bronze, and others produced according to national standard grades. It processes and produces various solid inlaid self-lubricating bearing products on this basis . At the same time, it uses sintering technology to produce bimetallic products and many other types of products. Since its establishment nearly 10 years ago, the company has focused on the research development, and production of various new self-lubricating bearings.

In the process of product production, our company has always insisted on independent casting production of raw materials to ensure the quality of products from the source; during the casting process, the whole process is monitored, and the finished product is tested by spectrometer three times before, in and after the furnace to confirm the material composition of the product. The national testing agency is regularly commissioned to test the material composition and mechanical properties of the product, and authoritative test reports can be provided to customers in need; the company implements integrated production from material to finished product processing and has more than 80 sets of advanced CNC machine tools, CNC lathes, machining centers, and other major equipment. The strong production capacity ensures that the material production is organized for customers for the first time, shortening the production cycle.
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    Establishment

    Founded in 2014, Shuangnuo has 10 years of experience in the industry.

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    Advanced Equipment

    Strong production capacity ensures that we can organize material production for customers as soon as possible and shorten the production cycle.

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    Happy Clients

    There are more than 5,000 cooperative customers around the world.

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JF-800 Bi-metal Bearing Industry knowledge

JF-800 Bi-metal Bearing: Engineered for Heavy-Duty Sliding Applications

Zhejiang Shuangnuo Bearing Technology Co., Ltd. is a China-based JF-800 Bi-metal Bearing manufacturer and factory, specializing in sintered bi-metal products that combine a low-carbon steel backing with a sintered copper alloy layer. Our range covers JF-800, JF-720, JF-700, JF-750, JF-20, and JF-800F flange variants, each engineered for specific load, speed, and lubrication conditions. We supply custom ODM/OEM solutions to global machinery builders, distributors, and maintenance teams.

Our manufacturing process integrates raw material casting, sintering, and CNC finishing in one facility, ensuring consistent quality and short lead times. We independently cast our copper alloys and perform spectrometer testing before, during, and after melting to verify composition. This vertical integration allows us to control bond strength, alloy purity, and dimensional accuracy from the first melt to the final bore.

Product Range and Application Fit

Each JF series grade is designed for a distinct operating window. The table below summarizes the standard alloys, load capacities, and typical uses.

Grade Alloy Layer Load Capacity Max Temp Typical Applications
JF-800 CuPb10Sn10 or CuSn6Zn6Pb3 65 N/mm² 260°C Mining, construction, marine, gearboxes
JF-720 CuPb24Sn4 38 N/mm² 170°C Pumps, compressors, automotive, agricultural
JF-700 CuPb30 25 N/mm² 170°C Engine bearings, high-speed low-load
JF-750 Lead-free alloy Varies Varies Heavy-duty engines, environmental compliance
JF-20 Aluminum alloy Varies Varies Industrial machinery, high strength
JF-800F CuPb10Sn10 65 N/mm² 260°C Flanged applications, axial location

Surface Engineering for Lubrication Control

We machine oil indents (diamond or ball patterns) and solid lubricant pockets (graphite or PTFE) into the alloy layer to match your lubrication strategy. Diamond indents suit oscillating movements in heavy-duty chassis; spherical indents are ideal for rotary applications where grease retention is critical. For maintenance-free operation, we embed graphite plugs that form a transfer film on the mating surface.

Our sintering process creates a metallurgical bond between the steel backing and copper alloy, preventing delamination even when deep pockets are machined. This is essential for high-impact loads in excavators, crushers, and presses.

Configuration and Customization

We offer cylindrical bushings, flanged bearings, thrust washers, and wear plates. Customization includes:

  • Bore, OD, and length dimensions to your drawing
  • Indent geometry and pattern density
  • Graphite plug size and spacing
  • Flange configurations (metric or inch)
  • Lead-free alloy options for environmental compliance

Our engineering team reviews your application to recommend the correct grade and surface treatment. We provide samples for validation before mass production.

Quality Assurance and Testing

Quality starts with our own casting. We perform three spectrometer checks—before, during, and after melting—to confirm alloy composition. We also commission national testing agencies for periodic verification of material and mechanical properties, and we can supply authoritative test reports with your shipment.

Our factory is equipped with over 80 CNC machines, lathes, and machining centers, enabling integrated production from raw material to finished part. This shortens lead times and ensures traceability.

Installation and Maintenance Support

We provide installation guidelines for each product, including recommended housing tolerances and shaft finish. For self-lubricating grades, no external lubrication is needed, but proper alignment and clearance are critical. Our technical team is available for pre-sales and after-sales support.

Information We Use to Configure Your Solution

To prepare a precise proposal, we need the following details:

  • Operating load (radial and axial) and direction
  • Shaft speed and type of motion (rotary, oscillating, linear)
  • Ambient temperature and lubrication conditions
  • Shaft and housing materials, hardness, and finish
  • Required dimensions and tolerance class
  • Any environmental or compliance requirements (e.g., lead-free)

With this data, we can recommend the optimal grade, surface treatment, and configuration.

FAQs

What is the difference between JF-800 and JF-720?

JF-800 uses a CuPb10Sn10 alloy with higher load capacity (65 N/mm²) and temperature rating (260°C), suited for heavy-duty low-speed applications. JF-720 uses CuPb24Sn4 with lower load (38 N/mm²) and temperature (170°C), ideal for medium-speed, medium-load uses like pumps and compressors.

Can you provide lead-free bi-metal bearings?

Yes, our JF-750 grade is lead-free and designed for heavy-duty engines where environmental regulations restrict lead content. We can also customize other grades with lead-free alloys upon request.

How do you ensure bond strength between steel and alloy?

Our sintering process creates a metallurgical bond. We control temperature and pressure to achieve consistent bonding, and we test for delamination during quality control. This ensures the alloy layer stays intact even with deep oil indents.

What is the typical lead time for custom orders?

Lead time depends on complexity and quantity. Since we cast our own materials and machine in-house, we can often start production immediately. Contact us with your specifications for a confirmed schedule.

Do you provide test reports with shipments?

Yes, we can provide material composition reports from our spectrometer tests and, when required, third-party test reports from national agencies. We include these with the shipment or upon request.