Super precision bearings are key to Airbus actuation systems

Custom super precision bearings manufactured by The Barden Corporation, part of the Schaeffler Group, are playing vital roles in the thrust reversing actuator system (TRAS) on the Airbus A350 XWB and electro-hydraulic actuator systems on the Airbus A380.

Bearings for the aerospace sector have to withstand harsh conditions, including extreme temperatures, demanding load profiles and high speeds and can therefore be custom engineered for a specific application.

The bearings supplied for the A380 primary flight control actuators are said to incorporate sealing technology that helps save space and are designed to withstand the high axial loads from the hydraulic pumps.

To minimise friction and adhesive wear in the TRAS of the A350 the bearings are provided with ceramic balls which are spring preloaded to minimise tolerance stack-up and lubricated-for-life with a special grease that provides mechanical stability

"We have supplied bearings for a variety of auxiliary aircraft positions including navigational gyroscopes, air cycle machines, actuators, primary and secondary flight controls, starter generators, hydraulic pumps and cabin fan bearings," Robin Kyte, sales manager at Barden explained. "We are committed to joint development partnerships with aerospace technology leaders such as UTC Aerospace Systems."