6404-2RS Deep Groove Ball Bearing For Industrial Applications | 20×72×19 mm

The 6404-2RS is a Single Row Deep Groove Ball Bearing with Contact Rubber Seals engineered for reliable performance in demanding industrial environments. With a 20 mm bore, 72 mm outer diameter, and a 19 mm width, it provides a robust and versatile solution for various machinery applications. Featuring the standard deep groove raceway geometry, this bearing efficiently accommodates radial loads as well as moderate axial loads in both directions. Equipped with double rubber seals (2RS) for effective contamination protection and lubricant retention, it is ideally suited for electric motors, pumps, agricultural equipment, and industrial machinery operating in dusty or moist conditions where maintenance access is limited.



6404-2RS Deep Groove Ball Bearing 20x72x19 mm | 64 Series | Double Rubber Seals (2RS)

A widely specified industrial bearing featuring the standard deep groove raceway geometry with integrated contact seals. Engineered for reliable operation at speeds up to 15,000 r/min (grease lubrication) with a reference speed of 24,000 r/min. The 6404-2RS combines robust construction, high load capacity, and effective sealing, making it a preferred choice for applications requiring protection against contaminants while delivering long, maintenance-free service life.

6404-2RS Deep Groove Ball Bearing For Industrial Applications | 20×72×19 mm

Comprehensive Applications

Ideal for industrial equipment operating in challenging environments:

Electric Motors & Drives
  • Industrial AC Motor Shafts
  • Pump Motor Bearings
  • Cooling Tower Fan Motors
  • Hermetic Compressor Motors
Pumps & Fluid Handling
  • Water Pump Bearings
  • Centrifugal Pump Assemblies
  • Irrigation System Pumps
  • Pool and Spa Pump Motors
Agricultural Machinery
  • Tractor Implement Bearings
  • Harvesting Equipment
  • Baler and Hay Equipment
  • Fertilizer Spreader Drives
  • Feed Mixer Gearboxes
Construction & Material Handling
  • Concrete Mixer Drives
  • Conveyor Roller Assemblies
  • Material Handling Equipment
  • Hoist and Winch Drums
  • Elevator Sheave Bearings

Key Performance Features

01. Integrated Contact Seal Protection

Equipped with double rubber seals (2RS) made from oil-resistant synthetic rubber, the 6404-2RS provides effective protection against dust, dirt, moisture, and other contaminants while retaining lubricant for the life of the bearing. This sealing solution eliminates the need for frequent re-lubrication and extends bearing service life in demanding environments.

02. High Load Carrying Capacity

Despite its sealed configuration, the 6404-2RS maintains the full deep groove raceway geometry, delivering dynamic and static load ratings of 30.7 kN and 15 kN respectively. This allows it to handle substantial radial loads and moderate axial loads in both directions, making it suitable for heavy-duty industrial applications.

03. Maintenance-Free Operation

Pre-lubricated with high-quality grease and permanently sealed, the 6404-2RS is designed for maintenance-free operation throughout its service life. This feature reduces downtime, eliminates the risk of over- or under-lubrication, and makes it ideal for applications where regular maintenance access is difficult or impractical.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 64 Series
Basic Designation 6404
Suffix Double Rubber Seal (2RS)
Bore Diameter (d) 20 mm
Outer Diameter (D) 72 mm
Width (B) 19 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel or Polyamide (depending on version)
Dynamic Load Rating (Cʳ) 30.7 kN
Static Load Rating (C₀ʳ) 15 kN
Limiting Speed (Grease) 24,000 r/min
Limiting Speed (Oil) 15,000 r/min
Weight (approx.) 0.4 kg

Interchange Part Numbers

Common manufacturer equivalents include:

  • SKF: 6404-2RS1, 6404-2RSH
  • NSK: 6404DDU, 6404VV
  • FAG: 6404-2RSR, 6404-2RSR-C3
  • NTN: 6404LLU, 6404LLB
  • KOYO: 6404-2RSE
  • TIMKEN: 6404-2RS
  • Generic: 6404-2RS, 6404-2RS1, 6404DDU, 6404LLU

Design & Configuration

The 6404-2RS is supplied as a factory-sealed, pre-lubricated unit ready for installation. The double rubber seals (2RS) are non-removable and designed to provide lifelong protection without maintenance. For applications requiring different internal clearance or precision grades, C3 clearance or P6 precision variants are available upon request. The bearing dimensions conform to ISO series 64 standards, ensuring full interchangeability with all major bearing manufacturers worldwide.

"For industrial equipment operating in contaminated environments where maintenance access is limited, the 6404-2RS sealed deep groove ball bearing delivers reliable, maintenance-free performance. Its combination of high load capacity, effective sealing, and factory lubrication makes it the ideal choice for pumps, agricultural machinery, and general industrial applications requiring long service life with minimal attention."



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