Dimensions
| Bore diameter |
30 mm |
| Outside diameter |
72 mm |
| Width |
19 mm |
Overview
The 6306-2Z deep groove ball bearing represents a refined fusion of durability and efficiency in rotary motion solutions. Designed with integral seals bearing type excels in applications requiring contamination protection while maintaining optimal lubrication integrity. Its standardized dimensions (30mm bore × 72mm OD × 19mm width) make it compatible with industrial equipment designs across multiple sectors.
Key Technical Advantages
1. Advanced Sealing Technology
- Dual-Contact Seals effectively retain grease while excluding particulate contaminants (>99% efficiency in IP5X equivalent environments)
- Lubrication Preservation System extends relubrication intervals by 3-5× compared to open bearings
- Silicone Nitride (Si3N4) Seal Material ensures chemical resistance to oils, weak acids, and alkalis 2. Enhanced Dynamic Performance
- Low Torque Design achieves friction coefficients below 0.0015 in grease-lubricated conditions
- Vibration-Optimized Raceways deliver <20 dB(A) noise levels at 3,000 RPM
- High-Speed Capacity:
- 12,000 RPM (oil lubrication)
- 8,500 RPM (grease lubrication)
3. Multi-Directional Load Capacity
- Radial load rating: 27.5 kN (static), 15.3 kN (dynamic)
- Axial load capacity: 35% of radial rating in both directions
- Combined load adaptability through optimized raceway geometry
Technical Specifications
| Parameter | Value | Tolerance | |--------------------|--------------|-----------------| | Bore Diameter | 30 mm | ISO P6 (+0/-5µm)| | Outer Diameter | 72 mm | ISO K6 (±10µm) | | Width | 19 mm | ISO Normal (±150µm) | | Seal Type | ZZ (Double Metal Shields) | N/A | | Dynamic Load Rating| 15.3 kN | ISO 281 | | Limiting Speed | 8,500 RPM | Grease-packed |
Application Scenarios
Industrial Implementations
- Electric Motors: HVAC systems, pump drives (IP55 environments)
- Material Handling: Conveyor rollers, automated sorting systems
- Precision Machinery: CNC tooling spindles, robotic joint assemblies
Commercial Applications
- Agricultural Equipment: Harvesters, seeders (dust-heavy environments)
- Automotive Systems: Alternators, water pumps (under-hood conditions)
- Food Processing: Mixers, packaging machinery (FDA-compliant lubricants)
Maintenance Protocol
- Initial Service Life: 8,000-10,000 operating hours (standard grease fill)
- Relubrication Interval: 2,000-hour increments (high-temperature applications)
- Contamination Check: Recommended after 5,000 service hours
- Seal Replacement: 15,000-hour typical lifespan
- Mounting Pressure: ≤150 MPa during press-fit installation
- Thermal Limits: -30°C to +120°C (standard seals), +150°C (high-temp variants)
- Alignment Tolerance: <0.05mm radial runout for optimal performance
TKD Information
- Title: 6306-2Z Sealed Deep Groove Ball Bearing | High-Speed Low-Maintenance Solution
- Keywords:
- Precision sealed ball bearings
- 30mm bore industrial bearings
- Low-friction high-RPM bearings
- Double-shielded 6306-2Z
- Maintenance-free bearing solutions
- Description: 6306-2Z double-sealed deep groove ball bearing offering extended service life through advanced contamination protection. Features 30mm bore, 72mm OD dimensions with optimized load capacity for industrial and automotive applications. Complies with ISO standards for vibration and noise reduction.
