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Oil Free Bushings

Since bearings usually receive a lot of frictional resistance that generates heat, lubricants such as oil or grease are used to prevent the seizing or abnormal wear that this frictional heat could otherwise cause. Lubrication-free bushings don't need lubricating oil because the bearing body has a lubricating structure made possible by lubricating oil in the bearing body, or by embedded solid lubricant or the like. Since they don't need lubricating oil, lubrication-free bushings are often used for applications such as precision machinery that makes lubricating oil refilling difficult, and equipment with poor affinity to oil. They also greatly reduce maintenance costs by eliminating the need for regular lubrication and enabling stable operation over long periods. Lubrication-free bushings come in a variety of shapes that can be used for different applications as needed. Examples include straight bushings, collar bushings, flange bushings and housing bushings.

Key Factors to Consider When Purchasing Oil-Free Bushings

Oil-free bushings are self-lubricating bearings that do not require external lubrication. They are ideal for applications where oil or grease lubrication is impractical or undesirable, such as in cleanroom environments, food processing, or outdoor equipment.

  • Load Capacity: The maximum load the bushing can handle while in motion. Ensure the bushing can handle the expected loads in your application.
  • Maximum Speed: The highest speed the bushing can operate at without compromising performance or lifespan.
  • Operating Temperature: The temperature range the bushing can withstand without significant degradation. Consider the environmental conditions in which the bushing will be used.
  • Exposure to Chemicals: If the bushing will be exposed to chemicals, select a material that is resistant to those substances.
  • Dust and Debris: If the operating environment is dusty, consider a sealed or shielded bushing to protect the internal components.
  • Noise and Vibration: Choose a bushing that minimizes noise and vibration to ensure a quiet operation.

Maintenance of Oil-Free Bushings

While oil-free bushings are designed to reduce maintenance needs, they still require some attention to ensure optimal performance and longevity

Regular Inspection

  • Visual Inspection: Check for signs of wear, damage, or contamination, such as cracks, chips, or excessive debris.
  • Noise and Vibration: Listen for any unusual noises or vibrations, which may indicate a problem.
  • Temperature: Monitor the operating temperature of the bushing. Excessive heat can lead to premature wear and failure.

Cleaning

  • Periodic Cleaning: Clean the bushing and its housing regularly to remove dust, dirt, and other contaminants.
  • Cleaning Agents: Use a soft cloth and a mild cleaning solvent to clean the components.
  • Avoid Harsh Chemicals: Avoid using harsh chemicals that can damage the bushing material.

Replacement

  • Wear Indicators: Monitor the bushing for signs of excessive wear, such as increased friction, noise, or reduced performance.
  • Replacement Schedule: Replace the bushing before it fails completely to avoid downtime and damage to other components.

While oil-free bushings are designed to reduce maintenance, they may still benefit from periodic lubrication, especially in harsh environments or high-load applications.

Key Factors to Consider When Purchasing Oil-Free Bushings

These bushings are designed to operate without external lubrication, making them ideal for applications where oil or grease lubrication is not feasible or desirable.

You can find a range of oil-free bushings on the MISUMI website, including various types, sizes, and materials. When selecting oil-free bushings, consider factors such as load capacity, speed rating, temperature range, and chemical resistance.

If you have any specific questions or need further assistance, you can contact MISUMI's customer support team.

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