Key Takeaways:
Marusaku hydrostatic rotary tables use an air-curtain seal to keep chips and coolant out of the oil film without mechanical contact. Learn the benefits over lip seals.
The Sealing Challenge
A rotary table sits in a storm of chips, coolant, and dust. If contaminants enter the oil film, stiffness and accuracy degrade. But a rubbing lip seal would reintroduce contact friction—defeating the purpose.

Air-Curtain Solution
An air-curtain seal blows a thin, continuous stream of clean air across the gap, creating an invisible barrier that keeps chips and coolant out while the table rotates freely with zero contact.
Benefits
- No mechanical contact → no friction, no wear
- Effective against chips, mist, and dust
- Keeps the oil film clean → stable accuracy
- Long service life, low maintenance
Why It Fits Hydrostatics
Because the whole bearing is non-contact, a non-contact seal is the consistent choice—preserving the table's core advantage of friction-free, wear-free operation.