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60 Series
Home Deep Groove Ball Bearings 60 Series

6021-ZZ Shielded Deep Groove Ball Bearing | Maintenance-Free Performance | 105×160×26 mm

6021-ZZ Shielded Deep Groove Ball Bearing | Maintenance-Free Performance | 105×160×26 mm

Engineered for reliable, long-lasting operation, the 6021-ZZ is a premium single-row deep groove ball bearing featuring dual metal shields. Designed as part of the 6000 extra-light series, it offers an excellent balance between space-saving dimensions and robust load-carrying capacity. With a 105 mm bore and a 160 mm outer diameter, this bearing is pre-lubricated with high-quality grease at the factory, making it an ideal "install-and-forget" solution for applications requiring protection against dust, dirt, and other external contaminants.

6021-ZZ Deep Groove Ball Bearing 105x160x26 mm | Double Shielded | Superior Grease Retention

Unlike open-type bearings, the 6021-ZZ is equipped with non-contact pressed steel shields on both sides. This configuration effectively seals the internal lubricant while blocking debris from entering the raceways. Because the shields do not make physical contact with the inner ring, the bearing maintains excellent high-speed capabilities with minimal friction, ensuring optimal thermal stability and extending the service life of your mechanical assemblies.

 

6021-ZZ Shielded Deep Groove Ball Bearing | Maintenance-Free Performance | 105×160×26 mm

Comprehensive Applications

The 6021-ZZ is highly versatile and frequently utilized in environments where contamination is a concern, but maintenance access is limited:

Manufacturing Equipment
  • Paper and Pulp Processing Rollers
  • Textile Machinery
  • Industrial Food Processing Equipment
  • Precision Machine Tools
Material Handling & Automation
  • Heavy-Duty Conveyor Rollers
  • Automated Packaging Machinery
  • Robotic Joint Assemblies
  • Overhead Hoist Systems
Ventilation & Fluid Processing
  • Industrial HVAC Fans and Blowers
  • Centrifugal Water Pumps
  • Air Compressors
  • Fume Extraction Systems
Electric Motors & Power Generation
  • Large Industrial Electric Motors
  • High-Efficiency Alternators
  • Generator Sets
  • Traction Motors

Key Performance Features

01. Dual Non-Contact Steel Shields (ZZ)

The integrated metal shields act as a robust barrier against coarse dust and particulate matter while securely retaining the factory-filled grease. The non-contact design ensures that friction and heat generation remain exceptionally low, allowing for high-RPM operation without the drag associated with rubber seals.

02. High-Purity GCr15 Chrome Steel

Forged from premium SAE 52100 (GCr15) Chrome Steel, the inner and outer rings, as well as the rolling elements, undergo advanced heat treatment. This results in superior hardness, excellent wear resistance, and reduced fatigue, allowing the bearing to support significant radial and moderate axial loads in both directions.

03. Lifetime Pre-Lubrication

Ready to use straight out of the box, the 6021-ZZ is packed with the precise amount of high-performance grease required for its lifespan. This eliminates the need for external lubrication systems, drastically reducing ongoing maintenance costs and machine downtime.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 6000 Series (Extra Light Series)
Basic Designation 6021
Suffix ZZ / 2Z (Double Metal Shields)
Bore Diameter (d) 105 mm
Outer Diameter (D) 160 mm
Width (B) 26 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class ABEC-1 (Higher grades available upon request)
Cage Material Stamped Steel Cage
Dynamic Load Rating (Cʳ) 72.8 kN
Static Load Rating (C₀ʳ) 65.5 kN
Limiting Speed (Grease) 4,300 r/min
Limiting Speed (Oil) --
Weight (approx.) 1.60 kg

Interchange Part Numbers

Common manufacturer equivalents for seamless replacement:

  • SKF: 6021-2Z
  • NSK: 6021ZZ
  • FAG: 6021-2ZR
  • NTN: 6021ZZ
  • KOYO: 6021 ZZ
  • Timken: 6021-ZZ

Design & Configuration

The Welink 6021-ZZ bearing is a closed-system component, fully lubricated and shielded to withstand moderately dusty industrial environments. It is intended for dry applications where oil-bath lubrication is not present. If your application demands absolute waterproofing or is exposed to heavy liquid washdowns, please explore our 6021-2RS (Rubber Sealed) variants. For open applications requiring external oil lubrication, refer to the standard 6021 open model.

"Upgrade your industrial machinery with the 6021-ZZ shielded bearing, delivering the perfect synergy of space efficiency, contaminant protection, and zero-maintenance reliability."

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