High-Speed NSK Angular Contact Ball Bearings 7020 and 7021

High-Speed NSK Angular Contact Ball Bearings 7020 and 7021

NSK high-speed angular contact ball bearings 7020 and 7021 are designed for precision and high-performance in machine tool applications. These bearings offer versatility with multiple contact angles and configurations, making them suitable for various industrial machinery where high axial and radial load capacities are required.

Features and Specifications:

• Contact Angle Options: Bearings are available in contact angles of 15° (C), 30° (A), 40° (B), and a special 25° (A5) option. The larger the contact angle, the greater the axial load-handling capacity.
• Material and Construction: Made with high-quality steel balls and retainers of steel, brass, or engineering plastic. The retainer formation is either pressed or turned, depending on the bearing design and application conditions.
• Load Capacity: Primarily designed to handle significant one-way axial loads. Greater contact angles allow these bearings to bear heavier axial loads effectively.
• Bearing Types: Available in various configurations to suit multiple applications:
  • Single Row Angular Contact Ball Bearing
  • Matched Angular Contact Ball Bearing
  • Double Row Angular Contact Ball Bearing
  • Four-Point Contact Ball Bearing
• Combination Options:
  • DF: Face-to-face combination
  • DB: Back-to-back combination
  • DT: Tandem combination
  • SU: Single, free combination
  • DU: Dual column, free combination
  • 3-Column Combinations: DBD, DFD, DTD
  • 4-Column Combinations: DBB, DFF, DBT, DFT, DTT
• Precision and Preload:
  • C10: Standard preloaded for optimal performance
  • C9: Light preloaded, suitable for low torque applications
  • PN7A: Standard precision (equivalent to ISO4 class)
  • PN7B: Enhanced control precision for specific inner and outer diameter variations (ISO4 grade, SU combination)

Applications:

• Widely used in various industries, including:
  • Metallurgical machinery
  • Mining machinery
  • Paper-making machinery
  • Textile machinery
• Machine Tool Applications: Designed to support ball screws, providing high speed and precision for optimal machine tool performance.

Key Specifications:

• Inner Diameter: Starting from 25 mm (0.98 inches)
• Contact Angle: Available options of 15°, 30°, 40°, and special 25° for tailored load-handling capabilities.
• Thrust Angle: Ideal for applications requiring high thrust capacity with versatile combination options.

Keywords: NSK bearings, high-speed bearings, angular contact ball bearings, machine tool bearings, axial load, radial load, precision bearings, industrial machinery.