High Speed Miniature Bearings are precision-engineered for applications requiring exceptionally high rotational speeds while maintaining compact form factors. With bore diameters typically ranging from 2 mm to 12 mm, these bearings are designed to operate at DN values (bore mm × RPM) exceeding 500,000, making them ideal for high-performance micro-rotating systems.
High Speed Miniature Bearings
Characteristics: Lightweight cages (phenolic or PEEK); low viscosity grease/oil mist; controlled internal clearance (C2 to C3).
Advantages: 30% lower heat generation at 400,000 rpm vs. standard bearings. Enables electric turbochargers and dental drills to exceed 500k rpm without seizure.
Technical Ceiling: Speed factor (DN) 1.8 million; dynamic capacity retention 85% after 10^9 revolutions; temperature rise <30°C above ambient at max speed.
Caution: Standard bearings with steel cages will fail within minutes. Must use oil-air lubrication above DN 1.2M. Even slight imbalance (G1.0 vs G2.5) drastically shortens life.
