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62 Series
Home Deep Groove Ball Bearings 62 Series

6205-ZZ Shielded Deep Groove Ball Bearing | Precision Metric Powerhouse | 25×52×15 mm

6205-ZZ Shielded Deep Groove Ball Bearing | Precision Metric Powerhouse | 25×52×15 mm

The 6205-ZZ is a high-performance, mid-series ball bearing engineered to deliver an exceptional balance of radial load capacity and high-velocity efficiency. Featuring dual non-contact metal shields (ZZ), this bearing ensures consistent internal lubrication and provides a mechanical barrier against dust without increasing rotational torque. With a 25mm bore and 52mm outer diameter, the 6205-ZZ is the industry standard for small-to-medium electric motors, industrial blowers, and domestic appliance drive systems.

6205-ZZ Deep Groove Ball Bearing 25x52x15 mm | Versatile 62 Series | Dual Metal Shields

Designed for sustained operational stability, the 6205-ZZ is manufactured from high-purity GCr15 chrome steel for maximum fatigue resistance. The precision-honed raceways and high-grade steel balls minimize vibration and acoustic noise, which is critical for high-speed motor applications. Because the metal shields do not physically contact the inner ring, the bearing maintains low operating temperatures and achieves higher limiting speeds compared to sealed variants, making it ideal for continuous-duty cycles in clean or semi-protected environments.

6206-ZZ Shielded Deep Groove Ball Bearing | Precision Metric Powerhouse | 25×52×15 mm

Comprehensive Applications

The 6205-ZZ provides the reliability needed for a wide range of precision machinery:

Electric Motors & Power Tools
  • High-efficiency AC and DC electric motors
  • Handheld industrial power tools
  • Portable generator rotor supports
Household & Commercial Appliances
  • Washing machine motor assemblies
  • Commercial kitchen equipment
  • Industrial vacuum cleaner fans
Automotive & Secondary Drives
  • Vehicle alternator internal bearings
  • Agricultural equipment pulley systems
  • Light-duty conveyor drive shafts
HVAC & Air Management
  • Centrifugal fan motor shafts
  • Air conditioning compressor units
  • Ventilation blower systems

Key Performance Features

01. Low-Friction Kinetic Efficiency

The 6205-ZZ utilizes a non-contact labyrinth seal design. This architecture provides the necessary protection against particulates while ensuring the lowest possible starting and running torque. This makes it an excellent choice for energy-sensitive applications where minimizing mechanical drag is paramount.

02. High Thermal Equilibrium

Due to the lack of seal friction, the 6205-ZZ operates with minimal heat generation. This thermal stability prevents the degradation of internal grease, ensuring a longer service life and higher rotational accuracy during peak RPM operations.

03. Super-Finished Raceways

Produced to P6 or P5 precision standards, the internal raceways are polished to a mirror finish. This reduces micro-friction and eliminates the high-frequency "whine" often associated with lower-grade bearings, ensuring silent operation in consumer-facing products.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 62 Series (Medium Duty)
Basic Designation 6205
Suffix ZZ (Double Non-Contact Metal Shields)
Bore Diameter (d) 25 mm
Outer Diameter (D) 52 mm
Width (B) 15 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) 14.0 kN
Static Load Rating (C₀ʳ) 7.85 kN
Limiting Speed (Grease) 13,000 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.128 kg

Interchange Part Numbers

Compatible with international standard 25mm bore shielded bearings:

  • SKF: 6205-2Z
  • NSK: 6205ZZ
  • FAG6205-2Z
  • NTN: 6205ZZ
  • KOYO: 6205ZZ
  • Nachi: 6205ZZ

Design & Configuration

The 6205-ZZ comes factory-lubricated with a long-life synthetic grease, providing a maintenance-free "lubricated for life" solution in standard operating conditions. For applications involving significant shaft expansion or high vibration, we offer C3 internal clearance options. For environments with heavy moisture or fine liquid spray, the 6206-2RS (rubber sealed) version is recommended for superior protection.

"Delivering high-speed stability and quiet performance, the 6205-ZZ is the definitive choice for precision electric motor applications."

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