self-lubricating bushes composite bearing material developed specifically to operate with marginal lubrication and consists of three bonded layers: a steel backing strip and a sintered porous bronze matrix, impregnated and overlaid with a pigmented acetal copolymer bearing material
Spherical Bearing Oilless Maintenance-free graphite joint bearing

Spherical Bearing Oilless Maintenance-free graphite joint bearing

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Graphite Joint bushings Corrosion resistance depends largely on the lubricant, bearing and mating surface materials. Graphite-based plugs should never be used where electrolytic corrosion can occur, such as high humidity atmospheres or submerged equipment. In this case PTFE-based plugs are recommended. Standard spherical bearing sizes
Spherical Bearing Oilless Maintenance-free graphite joint bearing
spherical plain bearing
spherical plain bearing SELF-LUBRICATING BRONZE BEARING SOLUTIONS

Spherical Bearing Oilless

A spherical bearing is a bearing that permits angular rotation about a central point in two orthogonal directions. When designing an oilless, maintenance-free spherical bearing with graphite, the bearing usually has a self-lubricating feature, often provided by embedded graphite plugs. These bearings are ideal in applications where maintenance is difficult, and lubrication is inconvenient.

Design Process for a Graphite Joint Spherical Bearing

1. Define Requirements:

  • Load Capacity: Define the load the bearing needs to support.
  • Angular Movement: Define the range of angular movement required.
  • Environment: Consider the operating environment, temperature, and any exposure to corrosive substances.

2. Material Selection:

Choose a suitable bronze alloy from the list provided, considering the application’s requirements and the material’s properties.

3. Bearing Design:

Design the bearing with appropriate dimensions, tolerances, and features. Include graphite plugs as lubrication providers. Graphite plugs are usually distributed in a specific pattern on the wear surface of the bearing.

4. Manufacturing:

  • Produce the spherical bearing shell, typically by casting or machining the selected bronze alloy.
  • Install the graphite plugs in the bearing shell. This can be done using press-fit or other suitable methods.

5. Testing and Inspection:

Verify the manufactured bearing meets the design specifications and performs satisfactorily under operating conditions.

Example Design

Here’s a simplified example design for an oilless, maintenance-free graphite joint spherical bearing using C95400 (Aluminum Bronze) due to its high strength and excellent corrosion resistance:

  • Material: C95400 Aluminum Bronze
  • Design Type: Spherical Bearing
  • Lubrication: Embedded Graphite Plugs
  • Bearing Dimensions:
    • Outer Diameter: 50 mm
    • Inner Diameter: 25 mm
    • Width: 20 mm
  • Graphite Plugs:
    • Diameter: 5 mm
    • Spacing: 10 mm center-to-center

Would you like any modifications to this design, or do you have specific dimensions and requirements for your bearing?

Steps to Manufacture

  1. Design:
    • Confirm the design specifications including dimensions, material, and graphite plug locations.
  2. Material Preparation:
    • Select the suitable bronze alloy, such as C95400 for high strength and corrosion resistance.
    • Prepare the graphite plugs.
  3. Mold Preparation:
    • Prepare a mold corresponding to the design specifications.
    • Ensure the mold is designed to hold the graphite plugs in place during casting.
  4. Centrifugal Casting:
    • Heat the selected bronze alloy to its melting point.
    • Pour the molten metal into the spinning mold.
    • Allow the metal to cool and solidify.
  5. Graphite Installation:
    • If the graphite plugs were not placed during casting, drill the necessary holes and press-fit the graphite plugs into the bearing surface.
  6. Finishing:
    • Remove the bearing from the mold and perform any necessary machining to achieve the final dimensions and surface finish.
    • Inspect the bearing to ensure it meets the design specifications.
  7. Quality Testing:
    • Test the bearing under simulated operating conditions to ensure it performs satisfactorily.

Cost Estimation

The factory wholesale price for such a bearing would depend on various factors, including:

  • Material costs for the bronze alloy and graphite.
  • Manufacturing costs, including labor, energy, and overhead.
  • Mold preparation and machining costs.
  • Quality testing and inspection costs.
  • The quantity of bearings ordered.

Without specific cost data and order quantities, it is not possible to provide an accurate price quote. However, typically, larger order quantities will result in lower per-unit costs due to economies of scale.

If you provide more specific details, including quantities, dimensions, and any other requirements, I can help you formulate a more detailed manufacturing plan and rough cost estimate based on general industry standards and practices.

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