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.

Suited for a wide range of applications requiring dependable sealing and robust performance:
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.
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.
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.
| 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 |
Common manufacturer equivalents include:
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."
The 6314 ZZ is a heavy-duty, single-row deep groove ball bearing engineered for demanding industrial applications requiring high load capacity and reliable contamination protection. Featuring dual Z-type metal shields, this bearing provides effective defense against dust and solid debris while maintaining low frictional torque. With a 70 mm bore and 35 mm width, it is the preferred choice for large electric motors, pumps, and industrial gearboxes where robust performance and extended service life are critical.
Details
The 6316 ZZ is a Single-Row Deep Groove Ball Bearing from the prestigious 6300 series, designed to deliver durable and consistent performance in medium to heavy-duty industrial applications. Featuring the classic deep groove raceway design, this metric bearing excels at accommodating substantial radial loads as well as bidirectional axial loads. With a robust 80mm bore, it is an essential component for larger electric motors, industrial pumps, heavy-duty gearboxes, and various machinery where dependable shaft support and operational smoothness are critical.
Details
The 6322 ZZ is a heavy-duty Single-Row Deep Groove Ball Bearing engineered for reliable performance in large-scale industrial applications. Featuring a standardized deep groove raceway design, this metric bearing is built to accommodate very high radial loads while also handling moderate axial loads in both directions. With a 110 mm bore, it is an essential component for heavy electric motors, large pumps, industrial gearboxes, and mining equipment requiring robust load support and operational stability.
Details
The 6324 is a heavy-duty Single-Row Deep Groove Ball Bearing engineered for reliable performance in large-scale industrial applications. Featuring a precision-ground deep groove raceway design, this metric bearing is built to accommodate very high radial loads while effectively handling moderate axial loads in both directions. With a 120 mm bore, it is an essential component for large electric motors, industrial pumps, heavy gearboxes, and mining equipment requiring robust load support and operational stability under demanding conditions.
Details
The 6303-ZZ is a Double Metal Shielded Deep Groove Ball Bearing engineered for applications demanding reliable protection against dust and solid contaminants while maintaining high-speed capability. Equipped with two non-contact metal shields (ZZ) on both sides, this bearing effectively prevents ingress of larger particles and retains grease lubrication with minimal friction. With a 17 mm bore, it is a versatile choice for electric motors, pumps, compressors, and industrial equipment where compact dimensions, moderate load capacity, and long service life are required.
Details
The 6305-2RS is a Double Rubber-Sealed Deep Groove Ball Bearing engineered to deliver reliable performance in demanding environments where protection against moisture, dust, and contaminants is essential. Fitted with two synthetic rubber contact seals (2RS) on both sides, this bearing ensures effective lubrication retention and prevents ingress of fine particles or fluids. Featuring a 25 mm bore, it is an ideal choice for electric motors, pumps, gearboxes, and industrial machinery requiring robust sealing and smooth operation under moderate to heavy loads .
Details
The 6305-ZZ is a Premium Single Row Deep Groove Ball Bearing designed for demanding applications that require reliable performance and durability. Featuring double metal shields (ZZ) on both sides, this metric bearing provides effective protection against dust and contamination while maintaining low rotational friction. With a 25mm bore, 62mm outer diameter, and 17mm width, it is ideal for electric motors, pumps, gearboxes, conveyors, and various machinery where robust construction and long service life are essential.
Details
The 6308 is a Premium Single Row Deep Groove Ball Bearing engineered for medium-to-heavy duty applications requiring reliable performance and extended service life. This metric bearing features an open design, allowing for flexible lubrication options and easy integration into various housing configurations. With a 40mm bore, 90mm outer diameter, and 23mm width, it is ideal for electric motors, pumps, gearboxes, industrial fans, and automotive components where robust construction and high load capacity are essential.
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