SKF 6318-2RS1/C3 – 90 mm Deep Groove Ball Bearing

SKF 6318-2RS1/C3 – 90 mm Deep Groove Ball Bearing

The SKF 6318-2RS1/C3 is a high-quality, deep groove ball bearing designed for applications where protection from contaminants and long-term reliability are essential. With contact seals on both sides, this “lubricated for life” bearing is effectively sealed against dust and moisture. The larger-than-normal C3 internal clearance makes it an ideal choice for high-speed or high-temperature applications where thermal expansion is a factor.

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Quick Navigation

• About This Bearing
• Technical Specifications
• Key Features & Benefits

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About This Bearing

This product is a **single-row deep groove ball bearing**, one of the most common and versatile types of rolling-element bearings. The **6318** part number specifies its basic dimensions, including a 90 mm bore. The **2RS1** suffix is crucial, as it indicates the bearing is equipped with **two contact seals**, one on each side. These seals are made of a synthetic rubber material and are in direct contact with the inner ring, creating a highly effective barrier against contaminants while retaining the internal grease. This design makes the bearing a maintenance-free unit. The **C3** suffix denotes a **radial internal clearance** that is greater than normal, which is important for applications where the bearing will operate at higher temperatures or with an interference fit, as the clearance will reduce during operation, preventing the bearing from seizing.

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Technical Specifications

• Manufacturer: SKF
• Part Number: 6318-2RS1/C3
• Bearing Type: Deep Groove Ball Bearing
• Dimensions:
  • Bore Diameter (d): 90 mm
  • Outer Diameter (D): 190 mm
  • Width (B): 43 mm
• Sealing: Two Contact Rubber Seals (2RS1)
• Internal Clearance: C3
• Weight: 4.99 kg
• Also Known As: 6318 2RS, 6318-C3, 90x190x43mm Bearing

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Key Features & Benefits

• Maintenance-Free: The contact seals on both sides make the bearing “lubricated for life,” eliminating the need for re-lubrication.
• High Contamination Protection: The 2RS1 seals provide a robust barrier against dust, dirt, and moisture, extending the bearing’s service life.
• High-Speed Capability: The C3 clearance allows for stable performance in high-speed and high-temperature environments.
• Versatile Use: Suitable for both radial and axial loads, making it a reliable component for a wide range of general industrial applications.