6306 Open Deep Groove Ball Bearing for Medium-Duty Industrial Applications | 30×72×19 Mm
The 6306 is a Single Row, Medium Series Deep Groove Ball Bearing engineered for robust performance and versatility across a wide range of industrial applications. As an open-type bearing without integral seals or shields, it provides maximum design flexibility for custom sealing arrangements and optimal heat dissipation. With a 30 mm bore and a substantial 19 mm width, it offers a balanced combination of high load capacity and dimensional stability, making it a reliable choice for demanding machinery and power transmission systems.
6306 Deep Groove Ball Bearing 30×72×19 mm | ISO 63 Series – Medium | Open Type (No Seals/Shields)
Built on a proven deep groove design, this bearing delivers smooth operation under both radial and axial loads at speeds up to 14,000 r/min (Oil). With optimized internal geometry and durable construction, it provides high dynamic and static load ratings, ensuring dependable performance in applications where flexible lubrication and sealing options are essential.

Suited for a broad spectrum of medium-duty industrial and mechanical systems:
The open design facilitates implementation of application-specific external seals and allows selection from a wide variety of grease or oil lubrication methods, offering engineers superior design versatility.
Precision-crafted raceways and balls reduce friction and vibration, promoting smooth running, energy efficiency, and stable performance across various industrial environments.
Featuring a medium cross-section and chrome steel construction, the 6306 sustains significant radial and moderate axial loads, providing long-lasting reliability in demanding operational settings.
| Bearing Type | Single Row Deep Groove Ball Bearing |
| ISO Dimension Series | 63 Series – Medium |
| Basic Designation | 6306 |
| Suffix | Open Type (No Seals/Shields) |
| Bore Diameter (d) | 30 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 | Steel Stamped |
| Dynamic Load Rating (Cʳ) | 7.8 kN |
| Static Load Rating (C₀ʳ) | 4.2 kN |
| Limiting Speed (Grease) | 9,000 r/min |
| Limiting Speed (Oil) | 14,000 r/min |
| Weight (approx.) | 285 g |
Common manufacturer equivalents include:
The 6306 is provided as a standard open bearing, offering a versatile platform for systems employing external housings or tailored sealing solutions. For environments requiring inherent protection, sealed (6306-2RS) or shielded (6306-ZZ) versions are offered as alternatives.
"As a core high-performance element in industrial machinery, the 6306 delivers established reliability, substantial load capacity, and the adaptability necessary for varied mechanical systems and applications."
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Details
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Details
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Details
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Details
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Details
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Details
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Details
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