6301-2RS Sealed Deep Groove Ball Bearing for Robust Medium-Duty Applications | 12×37×12 Mm

The 6301-2RS is a Double Rubber-Sealed, Medium Series Deep Groove Ball Bearing designed to deliver reliable performance and environmental protection in demanding conditions. Fitted with two integral rubber contact seals (2RS), it forms an effective barrier against contaminants such as dust, dirt, and moisture, while securely retaining lubricant within the bearing. With a 12 mm bore, 37 mm outer diameter, and a 12 mm width, this bearing offers an excellent balance of load capacity and compactness, making it ideal for medium-duty applications where sealing integrity is crucial.



6301-2RS Deep Groove Ball Bearing 12×37×12 mm | ISO 63 Series – Medium | Double Rubber Sealed

Engineered with a versatile deep groove geometry, this sealed bearing ensures smooth and quiet operation at speeds up to 18,000 r/min (Oil). It is capable of supporting substantial radial loads and moderate axial loads in both directions, providing a durable and maintenance-friendly solution for equipment operating in harsh or contaminated environments.

6301-2RS Sealed Deep Groove Ball Bearing for Robust Medium-Duty Applications | 12×37×12 Mm

Comprehensive Applications

Suited for a wide range of applications requiring dependable sealing and robust performance:

Automotive & Transportation
  • Automotive Alternators and Starter Motors
  • Idler and Tensioner Pulleys
  • Electric Cooling Fan Motors
  • Small Trailer and Utility Vehicle Wheel Hubs
Electric Motors & Industrial Drives
  • Industrial AC/DC Motors and Generators
  • Gearmotor and Reducer Output Shafts
  • Pump, Compressor, and Fan Motors
  • Agricultural and Lawn Equipment Motors
Appliance & Commercial Equipment
  • Commercial Appliance Motors (Dishwashers, Laundry)
  • Food Processing and Packaging Machinery
  • Vending Machine and Conveyor Drives
  • Commercial Ventilation and Blower Units
General Machinery & Equipment
  • Light to Medium Duty Conveyor Rollers
  • Material Handling Equipment Drives
  • Power Tool Gearboxes (Drills, Saws)
  • Irrigation and Water Pump Systems

Key Performance Features

01. Durable Medium-Series Construction

Built with a medium cross-section (12 mm width) using high-quality chrome steel, this bearing offers robust strength and durability, making it capable of handling significant radial and axial loads across various industrial applications.

02. Optimized for Reliable and Efficient Operation

Precision-ground raceways and balls are designed to ensure low vibration and quiet operation. This contributes to stable, consistent performance and improved energy efficiency, ideal for continuous-duty machinery.

03. Effective Protection with Dual Rubber Seals

Equipped with two rubber contact seals (2RS) on each side, this bearing provides superior defense against the ingress of contaminants and moisture. This feature is key to prolonging service intervals and ensuring reliable performance in damp or dusty conditions.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series 63 Series – Medium
Basic Designation 6301
Suffix 2RS (Double Rubber Contact Seals)
Bore Diameter (d) 12 mm
Outer Diameter (D) 37 mm
Width (B) 12 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Steel Stamped
Dynamic Load Rating (Cʳ) 6.10 kN
Static Load Rating (C₀ʳ) 2.85 kN
Limiting Speed (Grease) 12,000 r/min
Limiting Speed (Oil) 18,000 r/min
Weight (approx.) 52 g

Interchange Part Numbers

Common manufacturer equivalents include:

  • SKF: 6301-2RS
  • NSK: 6301DDU
  • FAG: 6301-2RSR
  • NTN: 6301LLU
  • KOYO: 6301LLB

Design & Configuration

The 6301-2RS comes standard with double rubber contact seals, making it the preferred choice for applications exposed to particulate contaminants, splashing water, or high humidity. For high-speed applications in cleaner, dry environments, the double metal-shielded version (6301-ZZ) is available as an alternative for lower running torque.

"A robust and reliably sealed performer, the 6301-2RS is engineered to extend equipment life and ensure consistent operation in the challenging environments of industrial motors, automotive systems, and general machinery."



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