Spherical Plain Bearing Sizes

Spherical Plain Bearing Sizes

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Spherical Plain Bearing Sizes

Special spherical plain bearing size, such as the JQB and JDBS series, are designed to meet specific requirements in various applications where standard spherical plain bearings may not suffice. These bearings are engineered to provide enhanced performance characteristics, such as increased load capacity, improved alignment capabilities, and specialized materials or coatings for particular operating conditions.

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Spherical Plain Bearing Sizes, JQB Size Chart

Special spherical steel plain bearings with maintenance-free self-lubricating bronze graphite balls offer a solution for various applications requiring specialized materials and enhanced performance. These bearings, exemplified by the JQB and JDBS series, are engineered to meet specific demands where standard spherical plain bearings fall short.

Overview of JQB and JDBS Series Bearings:

JQB Series: Featuring a spherical outer ring and a flat inner ring, JQB bearings are adept at accommodating angular misalignment and ensuring smooth operation under varying loads. They excel in demanding conditions, offering high reliability and durability.

JDBS Series: The JDBS series provides further customization for specialized applications. These bearings may incorporate materials resistant to corrosion, high temperatures, or other environmental factors. They can also be tailored in size or dimension to meet unique installation needs.

Size Specifications: The dimensions of JQB and JDBS series bearings are diverse, ranging from small diameters for precision tasks to larger sizes for heavy-duty applications. Key specifications include inner diameter (ID), outer diameter (OD), width or thickness, and spherical radius for misalignment allowance.

Application Considerations: Selecting the right special spherical plain bearing involves assessing factors such as load conditions, expected misalignment, operating environment, and required lifespan. Engineers must carefully evaluate these parameters to ensure optimal performance in machinery or equipment.

Conclusion: Tailored to meet specific demands, special spherical plain bearings like the JQB and JDBS series offer bespoke solutions for various applications. By understanding application requirements and consulting product catalogs or datasheets, engineers can confidently select bearings that guarantee reliable and efficient performance.

Technical Details:

Sliding Properties:

These spherical plain bearings boast maintenance-free sliding properties, conforming to standard production dimensions as per DIN specifications. Additionally, special measurements and designs can be promptly produced upon request. The sliding material used poses no health or environmental threats, especially when ordered lead-free.

Tolerance Details:

Housing Ø: As per customer’s specification.

Bushing Inner-Ø after mounting: According to customer’s specification.

Shaft Tolerance: According to customer’s specification [N/mm²].

Properties:

Maintenance-free, requiring no lubrication.

High load capacity.

Compatible with all DIN spherical plain bearings.

Suitable for water applications with special SL4 solid lubrication plugs.

Ideal for infrequent movements.

The stainless steel combination ensures faultless and long-term functionality.

Applications include valves, barrage assets, ball valves, guide vane bearings, dampers, offshore applications, etc.

Large dimensions exceeding 500 mm are possible.

Numerous special designs beyond standard measurements are available.

By utilizing different bronze and steel alloys, this bearing can cater to a wide range of applications.

Spherical Plain Bearing Sizes

Spherical Plain Bearing Sizes, JQB Size Chart

The JDBS series of self-lubricating spherical plain bearings is a high-performance bearing designed to provide excellent self-lubrication and self-aligning capabilities in various operating conditions. These bearings are particularly suitable for applications where conventional lubrication is challenging to implement or where reducing maintenance and extending equipment lifespan is desired.

Key Features:

  1. Self-lubrication: JDBS bearings utilize special solid lubricants such as graphite or PTFE (polytetrafluoroethylene) to form stable lubricating films on the bearing surface, reducing friction and wear for oil-free lubrication.
  2. Self-aligning capability: Designed with spherical contact surfaces, these bearings can automatically adjust to a certain extent, reducing stress and wear caused by misalignment.
  3. Accommodation of eccentric loads: JDBS bearings can withstand a certain degree of eccentric loads, making them suitable for applications where load direction may vary.
  4. Oil-free lubrication: Due to their self-lubricating properties, these bearings reduce reliance on external lubricants, thus lowering maintenance costs and the risk of environmental pollution.
  5. Wear resistance: Bearing materials typically include highly wear-resistant copper alloys or special composite materials, enhancing performance and lifespan in harsh environments.

Applications: The JDBS series bearings find wide applications in the following fields:

  • Automotive industry: Used in suspension systems, steering systems, universal joints, etc., providing smooth motion and reducing maintenance needs.
  • Industrial machinery: These bearings operate stably in high-temperature, high-humidity, or corrosive environments in industries such as food processing, textiles, and papermaking.
  • Agricultural machinery: The self-lubricating and wear-resistant properties of JDBS bearings contribute to improved reliability and reduced downtime in agricultural equipment.
  • Construction and mining equipment: In heavy-duty machinery like cranes and excavators, these bearings withstand heavy loads and provide long-term stable performance.

Structure: JDBS bearings typically consist of the following components:

  • Outer ring: Usually spherical in shape, matching with the spherical surface of the inner ring to allow for eccentricity and self-alignment.
  • Inner ring: Matches with the shaft or housing, often with internal threads or plain holes for easy installation.
  • Retainer: Sometimes includes a retainer to maintain the proper position and distribution of the balls.
  • Lubricant: Solid lubricants such as graphite or PTFE embedded in the bearing material provide self-lubricating properties.

The design and material selection of JDBS bearings ensure reliable performance under various operating conditions, whether in high-speed, low-speed, high-temperature, low-temperature, or heavy-load applications.

JQB self-lubricating spherical plain bearings have extensive applications in the field of hydraulic engineering, particularly in the following areas:

Excavator Joint Components

The joints of excavators, such as the bucket and arm, endure severe impact loads and friction. The JQB self-lubricating spherical plain bearings, with their excellent self-aligning capabilities and high load capacity, effectively handle these demanding conditions.

Mining Shovel Joints

Mining shovels frequently experience impact loads during operation. The self-lubricating and wear-resistant properties of JQB spherical plain bearings significantly extend their service life in these applications.

Rotary Drilling Rig Joints

Rotary drilling rigs face complex loading conditions during drilling operations. The automatic self-aligning feature of JQB bearings ensures proper functioning even under misalignment.

Hydraulic Cylinder Joints

In hydraulic engineering, the joints of hydraulic cylinders must support heavy loads and low-speed oscillations. The high load capacity and self-lubricating properties of JQB spherical plain bearings make them particularly suitable for these applications.

Gate Opening and Closing Mechanisms

Gate mechanisms in hydraulic systems must withstand water pressure and impact loads. The corrosion and wear resistance of JQB self-lubricating spherical plain bearings make them ideal for underwater applications.In summary, JQB self-lubricating spherical plain bearings are widely used in critical components of excavators, mining machinery, drilling rigs, hydraulic cylinders, and gate mechanisms in hydraulic engineering. Their unique features allow them to operate reliably in harsh environments over extended periods.

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