Advanced Oilless Bearings: Customizable Solutions for Superior Performance

We provide oilless brass bushings tailored to your unique requirements. Learn about these versatile, high-performing bushings, their characteristics, and why they are ideal alternatives to traditional split bushings Garlock bearings.

Understanding Oilless Brass Bushings

Oilless brass bushings significantly reduce friction, vibration, and noise in machinery while preventing corrosion and simplifying maintenance. Acting as sliding bearings, these bushings protect shafts and other rotating parts by providing a durable interface that wears less quickly than traditional bearings. When the bushings reach the end of their lifespan, they can be easily replaced, sparing you the cost of replacing an entire shaft.

Key Characteristics of Oilless Brass Bushings

1. Wear Resistance
   These bushings have excellent wear resistance due to their compact internal structure and absence of porosity. Their high hardness provides durability, and their polished surface enhances performance.
2. Corrosion Resistance
   Oilless brass bushings are known for their resistance to corrosion in atmospheres, freshwater, dilute acids, and other chemical exposures, making them perfect for extreme environments.
3. Pressure Resistance
   These bushings can handle high surface pressure and are ideal for low-speed, high-load applications, providing stable performance even under extreme stress.

Manufacturing Techniques

Oilless brass bushings can be produced using various casting techniques, such as sand casting, centrifugal casting, precision casting, and pressure casting.

Oilless Bearing Features

1. No Oil Supply Device Needed
   The self-lubricating property eliminates the need for oil supply systems, saving time and significantly reducing manufacturing costs.
2. Reduced Operation Costs
   Reduced lubricant usage and maintenance requirements eliminate the risk of oil supply failure.
3. Simplified Design Process
   Oilless bearings improve mechanical performance and extend service life, offering reliability and reducing design complexity.
4. Environmental Benefits
   No waste oil needs to be collected, promoting environmental protection.

Practical Use Tips

• Use Standard Specifications: Opt for standard specifications whenever possible.
• Clean Surfaces: Ensure surfaces are free of contaminants before assembly.
• Apply Lubricant: Apply lubricant to reduce initial friction and aid operation.
• Press Fit Slowly: Carefully press-fit the bearing to prevent deformation.
• Choose Appropriate Materials: Select materials suitable for your load requirements.
• Secure with Screws: In high-load or reciprocating applications, secure the bearing with screws.

Advantages of Oilless Bushings

1. Flexible and Simple Design
   The absence of an oil supply system simplifies the design process and allows for special shapes to suit unique requirements.
2. No Additional Lubrication
   A solid lubricant film forms naturally as the bearing operates, eliminating the need for added oil or grease.
3. Lower Usage Costs
   Self-lubricating properties maintain a clean environment while minimizing the expense of lubricants.
4. Superior High-Load, Low-Speed Performance
   The combination of high-strength brass alloy and graphite lubricant ensures consistent performance.
5. Exceptional Chemical and Corrosion Resistance
   Special formulations offer resistance to chemicals and corrosion, making them suitable for challenging environments.
6. Cost-Effective Solution
   Their longer lifespan and minimal maintenance requirements ensure competitive pricing and reduced downtime.

By providing exceptional performance and durability, our oilless brass bushings are the customizable, efficient solution for improving the reliability and lifespan of your equipment. Reach out to us today for tailored solutions to your specific needs!

Cast Bronze with Solid Lubricant Plugs – Metric Size

Our self-lubricating cast bronze bushings with solid lubricant plugs are expertly designed to meet the highest operational demands. They are perfect for applications requiring low-maintenance sliding bearings and are available in metric sizes.

Key Features

• Sliding Bearings: Self-lubricating bearings with solid lubricants embedded in the bronze base provide a reliable solution for heavy-duty applications.
• High Temperature Compatibility: Special lubricants ensure optimal performance in high-temperature environments ranging from 250 to 500°C.
• Oil-Free Bushings: Precision-fit bushings made of copper alloy provide seamless operation without the need for oil.
• Custom Manufacturing: Additional sliding bearing alloys can be provided based on specific requirements.

Characteristics

• Durability: The bronze-graphite combination ensures excellent performance under shock loads and high operational demands. Depending on the alloy used, the bushings also exhibit strong corrosion resistance and long-term wear resistance.
• Material Composition:
  • Support Material: CuZn25AI5Mn4Fe3 + graphite (High-Tensile Brass Alloy with Solid Lubricant Embedded)
  • Sliding Layer: Graphite coating comprises approximately 25-30% of the surface area
  • Alternative Alloys: CuAl10Ni, CuSn12Pb, and CuSn7ZnPb are also available.

Standard Dimensions

Available in both metric (mm) and imperial (inch) sizes, the standard tolerances for inner diameter (ID) are r6 or E7, while housing tolerances are H7. Our sales engineers can assist with custom tolerances if needed.

Availability

We offer a range of standard bearing forms and can manufacture to specific dimensions and shapes, including straight bushings, flanges, and washers. Custom forms such as half-bushings, special shapes, and deep-drawn bushings are also available.

Assembly Advice

• Lubrication: Although the bronze-graphite bearings are maintenance-free, initial lubrication during assembly is recommended for smooth start-up. Grease or oil lubricants can be used.
• Tolerance Recommendation: Housing diameter should be H7 to match the specified outer diameter (D). Consult the provided tolerance table for detailed guidelines.

Oilless Bearings Tolerance: For housing diameter, tolerance H7 (*2) to D dimensions (*1) is recommended. (Refer to Below Table 1) *Indicated dimensions

Application Range

These durable bushings, flanges, and washers are suitable for hardware fabrication, steel manufacturing, stamping dies, and automotive tooling components. The bronze-brass alloy with embedded lubricants makes them ideal for applications exposed to saltwater and other corrosive environments.

Special Manufacturing

For specialized applications with high-temperature requirements or unique dimensions, our team can supply tailored solutions to meet your needs.