High-performance Si3N4 Ceramic Deep Groove Ball Bearings engineered for extreme durability and ultra-smooth rotation. Precision-machined full ceramic construction (inner/outer rings + balls) ensures corrosion resistance, electrical insulation, and thermal stability up to 800°C.
Designed for high-speed applications including skateboard wheel assemblies, RC models, and industrial machinery. Silicon nitride ceramic balls reduce friction by 40% compared to steel bearings while maintaining 30% lighter weight.
Direct factory pricing guarantees wholesale rates for bulk orders. Compatible with standard 6901/6902/6903/6904 sizing for seamless replacement. Non-lubricated design operates flawlessly in wet/dry conditions.
Ideal for performance-driven applications requiring minimal maintenance: electric motor shafts, dental drills, and aerospace components. Vacuum-grade polishing achieves Ra≤0.05μm surface finish for vibration-free operation at 20,000+ RPM.
























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Long Life Full Ceramic Deep Groove Ball Bearing 6903 6902 6901 6904 Si3N4 Ceramic Ball Bearings for Skateboard Bearings
$2.54
Brand Name:
OEM
Outside Diameter:
30
Quantity:
Add to Cart
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