6305-ZZ Deep Groove Ball Bearing For Electric Motors & Industrial Applications | 25x62x17 mm
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.
6305-ZZ Deep Groove Ball Bearing 25x62x17 mm | ISO 63 Series – Medium Duty | Double Shielded
Premium precision bearing featuring the universal deep groove geometry. Engineered for smooth, high‑speed operation up to 13,000 r/min (Grease) and 16,000 r/min (Oil). The 6305-ZZ is capable of supporting moderate radial loads and light axial loads, making it a versatile component for electric motors, industrial machinery, agricultural equipment, and automotive applications.

Ideally suited for a wide range of industrial and automotive uses:
The double, non‑contact pressed steel shields offer robust dual‑side protection against dust and solid contaminants. This design effectively retains lubrication, extends service life, and ensures low friction operation suitable for a wide range of industrial applications.
The 63 series design features an optimized internal geometry that balances high radial load capacity with moderate axial load capability. Its robust construction ensures long‑term reliability under moderate to heavy loads, making it a preferred choice for electric motors, pumps, and gearboxes.
Manufactured to fine precision tolerances, with availability in higher grades (up to P5 precision grade). The refined raceway finish and accurate ball complement deliver exceptionally smooth, quiet, and stable rotation with minimal vibration—perfect for continuous‑duty machinery and sensitive equipment.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 63 Series – Medium Duty |
| Basic Designation | 6305 |
| Suffix | ZZ (Both sides with steel shields) |
| Bore Diameter (d) | 25 mm |
| Outer Diameter (D) | 62 mm |
| Width (B) | 17 mm |
| Material (Races & Balls) | Chrome Steel (GCr15 / SAE 52100) |
| Precision Class | P0 / P6 / P5 (ABEC 1/3/5) Available |
| Cage Material | Steel Stamped or Reinforced Nylon |
| Dynamic Load Rating (Cʳ) | 23.4 kN |
| Static Load Rating (C₀ʳ) | 11.6 kN |
| Limiting Speed (Grease) | 12,000 r/min |
| Limiting Speed (Oil) | 17,000 r/min |
| Weight (approx.) | 230 g |
Common manufacturer equivalents include:
The 6305-ZZ is equipped with double pressed steel shields as standard. For applications requiring enhanced sealing against moisture or fine contaminants, configurations with double rubber contact seals (6305-2RS) are available as an alternative.
"For general purpose electric motors and industrial machinery, the 6305-ZZ offers a perfect balance of protection and performance."
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Details
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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
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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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