Full Ball Bearing Popular Science: Why Are the Cage-Free Designs of 68/69 Series More Capable of "Heavy Work"?
May 11, 2026
Key Takeaways:
* Load Capacity: Full ball designs increase ball count by 30%–50%, boosting radial load capacity by 35%–45%.
* Best For: Low-speed oscillation, high impact, and space-constrained applications like MTB suspension pivots.
* Technical Specs: Features deepened raceways, C2 small clearance, and high-performance VRS/LLU seals.
* Speed Limit: Not recommended for continuous high-speed rotation (typically <1000 RPM).
I. The "Invisible Framework" — Why Remove the Cage?
In standard deep groove ball bearings, the cage separates steel balls to prevent friction. However, in heavy-duty thin-section bearings (like the 68/69 series), the cage occupies valuable internal space.
By removing the cage, we create a Full Ball (MAX) Bearing. Thi...