Ball bearings : Special bearings / bearing units : Touchdown bearings
The use of magnetic bearings gets more and more important for CO2 laser systems, liquid pumps as well in the optical industry. GMN has successfully been pushing the development and production of touchdown bearings since the mid-nineties.
Important performance criteria are:
* Arrangement of the bearings (rigid, radial and/or axial spring loaded).
* Bearing friction.
* Acceleration of touch-down bearing masses.
* Friction between shaft and bore.
Product characteristics :
Extremely high acceleration from zero to nominal speed (n · dm bis 3,5 · 106 mm/min).
High-impulse radial and axial forces.
High frequency of touchdowns.
Low-cost systems .
Aggressive environment applications.