Dimensions
| Bore diameter |
17 mm |
| Outside diameter |
47 mm |
| Width |
14 mm |
6303-2Z Deep Groove Ball Bearing with Seals/Shields: Precision Engineering for Demanding Applications
Product Overview
The 6303-2Z deep groove ball bearing represents an advanced solution for industrial applications requiring reliable rotational performance with minimal maintenance. Engineered with integral sealing technology (designated by "2Z"), this bearing combines the fundamental advantages of deep groove ball bearings with enhanced protection against environmental contaminants. Its optimized geometry and material selection enable exceptional rotational accuracy while maintaining compliance with ISO dimensional standards (17×47×14 mm).
Key Technical Advantages
1. Advanced Sealing System
Dual-Purpose Protection: Integral non-contact steel shields effectively retain lubricant (≥85% grease retention efficiency in standard conditions) while excluding particulate contaminants (tested against ISO 4406:2021 cleanliness standards)
Extended Service Life: Laboratory testing shows 40-60% longer L10 life compared to open bearings in moderate contamination environments
Lubrication Stability: Factory-preloaded high-performance lithium complex grease maintains optimal viscosity across -30°C to +120°C operational range
2. Enhanced Dynamic Performance
Low-Friction Design: Precision-ground raceways with Ra ≤0.1μm surface finish% compared to standard bearings
High-Speed Capacity: Verified operational limits up to 12,000 rpm (oil lubrication) or 8,000 rpm (grease lubrication) under moderate axial loads
Thermal Stability: Special heat stabilization process maintains dimensional stability within IT4 tolerance class at continuous 100°C operation 3. Versatile Loading Capacity
Radial Load Rating: 12.5 kN dynamic / 6.55 kN static
Axial Load Capacity: Supports bidirectional thrust loads up to 35% of radial rating
Misalignment Tolerance: Accommodates ≤0.5° static angular misalignment without performance degradation
Application Engineering Considerations
Optimal Deployment Scenarios:
Electric Motors: Particularly suitable for IEC frame size 80-132 motors requiring IP54 equivalent protection
Material Handling: Conveyor rollers, pulley systems, and light-duty gearboxes
Precision Instruments: Medical devices, optical equipment, and testing machinery
Mounting Recommendations:
Interference Fit: Recommended shaft tolerance j5/k5 for optimal load distribution
Installation Tools: Use induction heaters (≤110°C) or hydraulic press with alignment fixtures
Post-Installation Verification: Conduct vibration analysis (ISO 10816-3 compliance) and run-in procedure (30 minutes at 20% rated speed)
Maintenance Protocol
Relubrication Interval: 8,000-10,000 operating hours under normal conditions (40°C ambient temperature)
Condition Monitoring: Implement vibration velocity monitoring (4.5 mm/s RMS alert threshold)
End-of-Life Indicators: Replace when audible noise increases by 6 dB(A) or temperature rises 15°C above baseline
TKD Information
: 6303-2Z Sealed Deep Groove Ball Bearing - High Speed Low Maintenance Solution<br /><keywords>:<br /><br />Precision sealed ball bearings<br />17mm bore industrial bearings<br />Low friction high speed bearings<br />Shielded deep groove bearings<br />Long-life maintenance-free bearings<br /><description>: the 6303-2Z sealed deep groove ball bearing featuring advanced contamination protection, 12,000 rpm capability, and bidirectional load capacity. Engineered for electric motors, conveyors, and precision instruments requiring reliable low-maintenance operation.</p>
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