Precision Stainless Steel Miniature Deep Groove Ball Bearings (4216/4217/4218/4220/4301 Series)

High-grade 440C stainless steel construction ensures superior corrosion resistance and durability in harsh environments. Mirror-polished raceways and chromium steel balls guarantee ultra-low friction operation with 92% smoother rotation than standard bearings.

Precision CNC machining achieves ±0.001mm tolerance for vibration-free performance in high-speed applications (up to 30,000 RPM). Ideal for robotics, medical devices, miniature motors, optical equipment, and aerospace instrumentation.

Sealed variants available with special nitrile rubber or metal shields for dust/fluid protection. Compatible with industrial lubricants and high-temperature greases (-30°C to +120°C operational range).

Bulk order exclusive: Factory-direct pricing with 50% cost savings versus retail packaging. Custom specifications available for OEM projects (material certs provided). Compatible with SKF/NTN equivalent replacements.