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The support ring code 5301384 is a precision mechanical component designed for Gildemeister GM16AC multi-spindle automatic lathes and plays a crucial role in the bar clamping system of the main spindle. The ring provides the contact surface against which the clamping fingers of the spindle collet operate, allowing proper force transmission required for bar clamping during machining operations.

In multi-spindle automatic lathes the bar clamping system is one of the assemblies subjected to the highest dynamic loads. During each machining cycle the clamping fingers apply pressure against the support ring. Through the lever action of the closing mechanism, this force generates the backward movement of the bar pull rod, which activates the collet and clamps the bar securely during the machining process.

The geometric precision of the ring and the quality of its contact surfaces directly influence the stability of the clamping system and the repeatability of the production cycle. A stable support surface reduces mechanical play in the clamping mechanism and contributes to maintaining concentricity and dimensional accuracy of machined components.

The ring is equipped with radial indexing holes which allow controlled rotation of the component during maintenance operations. This design enables different sections of the contact surface to be used over time, distributing wear evenly and extending the service life of the component.

Due to the high cyclic loads applied during operation, this ring is considered a wear component within the main spindle clamping system. For machines operating continuously 24 hours a day, typical of high-volume production in the automotive and precision turned parts industries, it is recommended to rotate and reposition the ring to a new hole every 18–24 months to maintain optimal clamping stability and machining precision.

Proper maintenance of this component contributes significantly to spindle assembly stability, reduces mechanical transmission clearances and preserves the high accuracy required in precision machining environments.

This support ring therefore represents an essential maintenance component for the reliable operation of Gildemeister GM16AC multi-spindle automatic lathes.