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62 Series
Home Deep Groove Ball Bearings 62 Series

6210-ZZ Shielded Deep Groove Ball Bearing | Versatile Medium-Duty Bearing | 50×90×20 mm

6210-ZZ Shielded Deep Groove Ball Bearing | Versatile Medium-Duty Bearing | 50×90×20 mm

The 6210-ZZ is a highly adaptable, medium-series ball bearing engineered to deliver an optimal balance between radial load capacity, operational speed, and space efficiency. Outfitted with dual non-contact steel shields (ZZ), this component effectively retains internal lubrication while deflecting airborne dust and debris without introducing rotational drag. Featuring an industry-standard 50mm bore, a 90mm outer diameter, and a 20mm width, the 6210-ZZ is a foundational component for general manufacturing, medium-sized electric motors, and automated conveyor systems.

6210-ZZ Deep Groove Ball Bearing 50x90x20 mm | Standard 62 Series | Dual Metal Shields

Designed to serve as the reliable workhorse of industrial power transmission, the 6210-ZZ is forged from premium GCr15 chrome steel. Its optimized internal geometry accommodates substantial radial forces alongside moderate axial loads in both directions. Because the pressed steel shields do not physically contact the inner ring, the bearing avoids the friction and heat generation typical of sealed units. This design allows for higher continuous RPMs, making it the preferred solution for continuous-duty machinery that requires long-term stability with zero maintenance.

6210-ZZ Shielded Deep Groove Ball Bearing | Versatile Medium-Duty Bearing | 50×90×20 mm

Comprehensive Applications

The 6210-ZZ provides structural equilibrium and consistent rotation for a vast array of mechanical systems:

Automotive & Agricultural Equipment
  • Tractor power take-off (PTO) assemblies
  • Harvester drive and tensioner mechanisms
  • Light commercial vehicle transmission supports
Electric Motors & Power Drives
  • Medium-duty AC and DC industrial motors
  • Power transmission gearboxes and reducers
  • Commercial alternator and generator shafts
Fluid Handling & HVAC Systems
  • Commercial centrifugal water pumps
  • High-capacity industrial air blowers
  • Rotary compressor drive units
General Manufacturing & Conveyance
  • Heavy-duty automated conveyor rollers
  • Material handling and packaging lines
  • Industrial textile and printing machinery

Key Performance Features

01. Optimal Load-to-Speed Ratio

As a core member of the 62 series, this bearing offers a thicker cross-section and larger steel balls than the 60 series, yielding a significantly higher dynamic load rating. Simultaneously, it maintains a compact enough footprint to achieve the high rotational speeds required by modern electric motors, providing a perfect structural balance.

02. Frictionless Grease Retention

The ZZ shield configuration serves a dual purpose: it locks in the high-performance factory grease while creating a narrow labyrinth clearance that blocks external particulates. This non-contact design ensures the bearing runs cooler and consumes less mechanical energy than contact-sealed alternatives.

03. Vibration-Resistant Precision

Manufactured to stringent P0 (standard) or P6 (enhanced) tolerances, the 6210-ZZ features super-finished raceways that minimize acoustic noise and operational vibration. This smooth-running characteristic is critical for extending the service life of sensitive electrical components and adjacent drivetrain parts.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 62 Series (Medium Duty)
Basic Designation 6210
Suffix ZZ (Double Non-Contact Metal Shields)
Bore Diameter (d) 50 mm
Outer Diameter (D) 90 mm
Width (B) 20 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) 35.1 kN
Static Load Rating (C₀ʳ) 23.2 kN
Limiting Speed (Grease) 7,500 r/min
Limiting Speed (Oil) --
Weight (approx.) 0.46 kg

Interchange Part Numbers

Directly compatible with industry-standard 50mm bore shielded bearings:

  • SKF: 6210-2Z
  • NSK: 6210ZZ
  • FAG6210-2Z
  • NTN: 6210ZZ
  • KOYO: 6210ZZ
  • Nachi: 6210ZZ

Design & Configuration

The 6210-ZZ is supplied pre-lubricated with an industrial-grade synthetic grease, ensuring it is ready for immediate installation. For electric motor applications where operating temperatures fluctuate significantly, we highly recommend selecting the C3 internal clearance option to safely accommodate thermal expansion. If the operating environment involves direct exposure to liquids or heavy mud, the 6210-2RS (rubber contact seals) should be utilized.

"Balancing formidable load capacity with high-speed efficiency, the 6210-ZZ is the universal standard for versatile industrial rotation."

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