The precision adjustment screw for pick-off spindle stop is a critical component in the kinematic control of pick-up and back-working operations in Gildemeister DMG Mori multi-spindle cam automatic lathes, specifically GS20 and GM20AC models. Its primary function is to enable micrometric axial positioning of the pick-off spindle, ensuring accurate and repeatable stopping during synchronization with the main spindle. Functionally, this screw operates as an adjustable mechanical stop, directly affecting the final axial position of the spindle during part transfer and secondary machining phases. The high-precision threading allows fine adjustment, minimizing positioning errors and compensating for mechanical play within the machine kinematics, including axial slides, guide systems, and mechanical couplings. During operation, it contributes indirectly to motion transmission and system stabilization, ensuring correct force distribution during part gripping and machining. Its adjustment has a direct impact on critical parameters such as concentricity, repeatability, parallelism, and final part geometry. This component is widely used in high-precision applications requiring tight tolerances and process reliability, such as automotive and precision engineering industries. Proper adjustment improves process stability, reduces vibration and wear, and enhances overall machine performance.