A METAL BALL WHICH IS A SPECIFIC PART OF A SLAT KNUCKLE BEARING. THIS IS USED ON THE WINGS OF AN AIRCRAFT. THE SLAT TRACK MOVES IN RELATION TO THE WING LEADING EDGE. THE SLAT IS CONNECTED TO THE SLAT TRACK USING THE SLAT KNUCKLE BEARINGS.THESE SLATS ARE AERODYNAMIC SURFACES ON THE LEADING EDGE OF THE WINGS OF FIXED-WING AIRCRAFT WHICH, WHEN DEPLOYED, ALLOW THE WING TO OPERATE AT A HIGHER ANGLE OF ATTACK. A HIGHER COEFFICIENT OF LIFT IS PRODUCED AS A PRODUCT OF ANGLE OF ATTACK AND SPEED, SO BY DEPLOYING SLATS AN AIRCRAFT CAN FLY SLOWER OR TAKE OFF AND LAND IN A SHORTER DISTANCE. THEY ARE USUALLY USED WHILE LANDING OR PERFORMING MANOEUVRES WHICH TAKE THE AIRCRAFT CLOSE TO THE STALL, BUT ARE USUALLY RETRACTED IN NORMAL FLIGHT TO MINIMISE DRAG.

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6. CN CODE 84819190 INCLUDES OTHER THAN TAPERED ROLLERS.