Product detailed description

The NN 3021 KP/51 ZKL is a double-row precision cylindrical roller bearing renowned for its high radial load capacity and exceptional running accuracy. This bearing is commonly used in applications requiring high precision and load-bearing capabilities, such as machine tool main spindles.

Key Features:

• Design: Double-row cylindrical roller bearing with a solid inner and outer ring.
• Roller Guidance: Cylindrical rollers are guided by flanges, ensuring controlled movement and reduced friction.
• Cage: Equipped with a high-strength, two-piece machined brass cage to prevent roller contact and minimize friction.
• Precision: Manufactured to ISO Class 5 tolerances, offering high dimensional and running accuracy.
• Internal Clearance: Features C2 internal clearance, providing a smaller than normal radial internal clearance for improved performance.
• Operating Temperature Range: Suitable for temperatures up to 120°C.

Technical Specifications:

• Dimensions:

  • Inner Diameter (d): 105 mm
  • Outer Diameter (D): 160 mm
  • Width (B): 41 mm
  • Width (C): 41 mm
  • Width (Ew): 146 mm
  • Minimum Bore Diameter (da min): 114 mm
  • Maximum Bore Diameter (db max): 151 mm
  • Maximum Outside Diameter (Da max): 148 mm
  • Minimum Outside Diameter (Db min): 148 mm
  • Chamfer Radius (r): 2 mm

• Load Ratings:

  • Dynamic Load Rating (C): 198 kN
  • Static Load Rating (C0): 320 kN

• Speed Limits:

  • Limiting Speed with Oil Lubrication: 4,500 RPM
  • Limiting Speed with Grease Lubrication: 3,800 RPM

• Material:

  • Hardened alloy steel for both inner and outer rings.
  • High-strength, two-piece machined brass cage.

This bearing is designed to provide smooth and efficient rotation for various applications, ensuring high performance and durability. Its robust construction and precision engineering make it ideal for demanding industrial environments.