SETCO AirShield^3® Eliminates the #1 Cause of Bearing Failures

The "Most Reliable" Bearing Isolator in the Industry

SETCO introduced the AirShield® spindle seal/bearing isolator system in 1999 and now has over 6000 AirShield spindle seals in service, over 3000 spindles, the AirShield® has proven itself to be the most reliable spindle seal in the industry and comes with a standard 3-year limited warranty against bearing failure due to coolant ingress and contamination.

The patent pending SETCO AirShield® eliminates the #1 cause of spindle failure- bearing contamination from coolant ingress, condensation, and dirt contaminates entering the spindle bearing causing them to fail. The AirShield® design is simple, maintenance-free, and has no moving parts to wear out.  It requires only standard clean and dry shop air.  It provides 100% dynamic and static protection against bearing contamination. 

The AirShield® is a patent pending air purge system that uses regulated air pressure to "back pressure" a flexible lip seal to prevent contaminants from entering the spindle.  The system utilizes a constant air flow to create a near frictionless seal between the bearing cap and the spindle shaft to protect the front and rear bearings.  Equalized air escapes by gently lifting the seal from its contact surface.   As the spindle is subjected to high-pressure coolant spray, the forces narrow the escaping air path causing increased backpressure and further increases the effectiveness of the AirShield3®.  Unlike positive internal pressure (PIP) air seal systems, the AirShield® design does not inhibit spindle bearing lubrication.