The 15.25.205 guide support is a key precision component for the correct operation of Gildemeister DMG-Mori multi-spindle automatic lathes, models AS20, GS20, GM20, GM20AC. Its function is to guide the motion of the front tool-holder spindle with continuity and stiffness, ensuring coaxiality and kinematic stability during drilling, boring/reaming, tapping and workpiece support phases, where any misalignment or clearance immediately results in dimensional errors, degraded geometric tolerances and increased machining vibration.

The support is supplied with semi-finished bushings in order to allow final functional finishing on the machine by means of a line-boring operation performed directly on the lathe, using the main spindle as the geometric reference. This machining step provides the exact alignment of the front axis with the main bar-rotation axis, which is essential for smooth front-spindle feed and repeatable front machining operations. The line-boring operation must be carried out with strict control of the seat surface quality, requiring a surface roughness lower than Ra 0.6 to guarantee precise and uniform sliding without binding, and to minimize play and micro-oscillations of the front tool-holder spindle.

Before line-boring is performed, the machine must be in a condition of perfect alignment, because in-machine machining transfers any geometric or setup error of the spindle group and guideways directly to the bushing seats. An incorrect setup, even if slight, can produce a non-coaxial guide condition, leading to higher friction, accelerated bushing wear, dimensional drift during machining and loss of accuracy in drilling, boring/reaming and tapping operations carried out with the front spindle. For this reason, once bored to size and to the required finish, the 15.25.205 support becomes a determining element for the reliability and overall precision of the front kinematic assembly.

 un componente determinante per l’affidabilità e la precisione complessiva del cinematismo frontale.