Locknut 0201202 is an axial fixing component designed to secure the 6206 RS bearing on the Feed finger tube of the Gildemeister DMG Mori GM20AC multi spindle lathe in the 20 mm bar feeding configuration. Its function is to keep the bearing in the correct axial position during pushing, return and sliding phases of the drawtube, preventing micro movements that could generate backlash, noise, vibration or variations in the linearity of the motion. From a kinematic point of view, the locknut works as a reference and retention element for the rotating support of the drawtube, contributing to the regular transmission of the motion generated by the cam drive and to the stability of the assembly made up of the Feed finger tube, bar pusher collet, bearing, bar guide bushing and lateral pad. Correct axial locking of the bearing helps limit abnormal friction and misalignment, keeping the drawtube stroke precise and repeatable and preserving correct bar advancement against the bar stop. In high productivity industrial applications such as automotive, precision engineering, preventive maintenance and extraordinary maintenance of automatic lathes, this locknut is essential for maintaining process continuity, system reliability and dimensional quality of turned parts. During inspection and maintenance it is important to verify correct tightening, absence of abnormal axial play on the 6206 RS bearing and correct alignment of the drawtube group along its stroke. Incorrect adjustment can affect feeding precision, increase vibration of the rotating bar and generate form or geometry errors on the part, especially in continuous machining and highly repetitive cycles. Locknut 0201202 is therefore a small but decisive element in the bar feeding kinematic chain, because it secures the mechanical reference of the bearing and contributes to the overall stability of the bar pusher group.