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62 Series
Home Deep Groove Ball Bearings 62 Series

6204-ZZ Shielded Deep Groove Ball Bearing | High-Speed Metric Bearing | 20×47×14 mm

6204-ZZ Shielded Deep Groove Ball Bearing | High-Speed Metric Bearing | 20×47×14 mm

The 6204-ZZ is a high-precision, mid-series ball bearing engineered to deliver a superior balance of radial load capacity and high-velocity stability. Equipped with dual non-contact metal shields (ZZ), this model excels at retaining internal grease and deflecting dry contaminants without increasing rotational torque. Featuring a 20mm bore and a 47mm outer diameter, the 6204-ZZ is the industry standard for high-performance electric motor rotors, power tool assemblies, and commercial office equipment requiring a maintenance-free rotational solution.

6204-ZZ Deep Groove Ball Bearing 20x47x14 mm | Performance 62 Series | Dual Pressed Steel Shields

Designed for sustained precision in high-speed environments, the 6204-ZZ is manufactured from high-purity GCr15 chrome steel. The non-contact labyrinth shielding architecture allows the bearing to reach significantly higher limiting speeds than sealed versions by eliminating friction-induced heat buildup. This makes it an ideal choice for continuous-run machinery where energy efficiency and thermal equilibrium are critical for extending the service life of the entire drive system.

6204-ZZ Shielded Deep Groove Ball Bearing | High-Speed Metric Bearing | 20×47×14 mm

Comprehensive Applications

The 6204-ZZ provides the reliability required for a wide variety of mechanized systems:

Automotive Auxiliary Systems
  • Vehicle starter motor internal bearings
  • Automotive alternator rotor supports
  • Cooling fan and water pump assemblies
Household & Light Industrial Gear
  • Washing machine motor drive units
  • Commercial kitchen and food processing equipment
  • Small-scale conveyor belt drive pulleys
Office & Commercial Equipment
  • High-speed laser printer rollers and copiers
  • Automated sorting machinery components
  • Specialized medical and laboratory centrifuges
Electric Motors & Power Tools
  • High-efficiency AC and DC electric motors
  • Professional-grade power tools (circular saws, grinders)
  • Industrial vacuum cleaner motor supports

Key Performance Features

01. Frictionless Labyrinth Shielding

The ZZ designation indicates double-sided metal shields that provide a mechanical barrier against particulates while maintaining a non-contact clearance. This ensures the bearing can operate at maximum RPM with lower operating temperatures and higher mechanical efficiency than contact-sealed alternatives.

02. Precision-Honed Vibration Control

Processed to P6 or P5 precision standards, the 6204-ZZ features super-finished raceways that drastically reduce acoustic noise and operational vibration. This precision is vital for high-speed motors where smooth rotation directly impacts the overall efficiency and lifespan of the equipment.

03. Pre-Lubricated for Longevity

Each 6204-ZZ is factory-packed with high-performance synthetic lithium grease. The shields work to contain the lubricant within the raceway tracks, providing a "lubricated for life" solution that reduces the total cost of ownership for end-users.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 62 Series (Medium Duty)
Basic Designation 6204
Suffix ZZ (Double Non-Contact Metal Shields)
Bore Diameter (d) 20 mm
Outer Diameter (D) 47 mm
Width (B) 14 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard (P0) / P6 or P5 Available Upon Request
Cage Material Pressed Steel
Dynamic Load Rating (Cʳ) ~12.7 kN
Static Load Rating (C₀ʳ) ~6.6 kN
Limiting Speed (Grease) ~15,000 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.106 kg

Interchange Part Numbers

Compatible with industry-standard 20mm bore shielded bearing designations:

  • SKF: 6204-2Z
  • NSK: 6204ZZ
  • FAG6204-2Z
  • NTN: 6204ZZ
  • KOYO: 6204ZZ
  • Nachi: 6204ZZ

Design & Configuration

The 6204-ZZ is engineered for "fit and forget" convenience in clean to semi-protected environments. For applications requiring compensation for thermal expansion, C3 internal clearance variants are available. In environments with direct exposure to liquids or moisture, the 6204-2RS (rubber sealed) version is recommended for maximum ingress protection.

"Delivering high-velocity stability and effortless rotation, the 6204-ZZ is the professional standard for high-performance motor and tool applications."

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