FAG KM13 – M65x2 Bearing Locknut

FAG KM13 – M65x2 Bearing Locknut

The FAG KM13 is a high-quality bearing locknut designed to securely fasten bearings with a tapered bore onto a shaft or adapter sleeve. Conforming to the DIN 981 standard, this locknut is essential for preventing the axial movement of bearings, ensuring they remain in their precise operating position. Its robust steel construction and metric threading make it a reliable component for a wide range of industrial applications, guaranteeing stability and long-term performance when used in conjunction with a corresponding lock washer.

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Quick Navigation

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

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About This Bearing Locknut

This product is a KM-series bearing locknut, a specialized mechanical component used to secure bearings with a tapered bore onto a cylindrical shaft. Its primary function is to lock the bearing in place, preventing it from loosening or moving axially under load or vibration. The design features an external metric thread and four evenly spaced slots on the outer face. These slots are used to engage with a locking device, typically an **MB-series lock washer** (in this case, the MB13). The lock washer has an internal tab that fits into a keyway on the shaft and external tabs that are bent into one of the locknut’s slots after tightening. This simple yet effective system provides a secure, positive lock that resists rotational forces and ensures the integrity of the bearing assembly.

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Technical Specifications

• Manufacturer: FAG (part of the Schaeffler Group)
• Part Number: KM13
• Type: Bearing Locknut
• Standard: DIN 981
• Thread Size: M65x2 mm
• Dimensions:
  • Outside Diameter (D): 85 mm
  • Inner Diameter (d): 65 mm
  • Width (B): 12 mm
• Locking Device: Requires MB13 lock washer (not included)
• Material: Steel
• Also Known As: Bearing Locknut KM13, KM-13, M65x2 Locknut

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Key Features & Benefits

• Secure Axial Locking: Prevents bearings from moving on the shaft, ensuring precise and stable operation.
• Durable Construction: Made from high-quality steel to withstand high loads and vibrations in industrial environments.
• Standardized Design: Conforms to the DIN 981 standard, ensuring compatibility and reliable performance.
• Simple, Reliable Mechanism: When used with an MB-series lock washer, it provides a positive lock that is easy to install and remove.