The 31.01.108 main spindle collet closing clamping fingers is a precision mechanical wear component designed for Gildemeister DMG Mori GS20 and GM20AC multi-spindle lathes, used in the bar clamping system in the configurations for machining up to 20mm maximum diameter with 9012E bar clamping collet and up to 25mm maximum diameter with 9017E bar clamping collet. clamping fingerss 3101108 are housed in the slots of the command group and work as lever, support and thrust transmission elements, bearing against sleeve 3160202, bushing 3101110 and ring 3101107. Through the lever movement of bell 0801351, the clamping fingerss transfer load to the clamping chain and generate the pullback required to close the collet on the bar. In this system, the clamping fingers is not merely a contact element but a kinematic component that transforms, distributes and directs the command force, maintaining the correct sequence between main spindle rotation, sleeve position, support on the bushing, support on the ring and pullback of the clamping chain. During the working cycle, sleeve 3160202 takes rotation from the main spindle and works in coordination with the clamping fingerss housed in the slots; these elements must remain correctly guided, supported and synchronized so that the movement of bell 0801351 is converted into regular, controlled and repeatable thrust on the sleeve, bushing 3101110 and ring 3101107. The quality of contact between clamping fingers, slot, sleeve, bushing and ring affects stroke accuracy, clamping repeatability and bar gripping stability. In the 20mm variant, collet 9012E requires regular and precise closure to maintain centering, cycle continuity and bar stability; in the 25mm variant, collet 9017E works with higher bar mass, rotational inertia and loads, so clamping fingers efficiency becomes even more important to prevent micro slipping, vibration, loss of concentricity, cutting instability, dimensional errors, form errors and workpiece geometry defects. If the clamping fingerss operate with excessive play, marked surfaces, compression marks, localized wear or irregular sliding, collet closure may become less uniform, with reduced effective force on the bar, increased functional play, poorer repeatability and lower main spindle stability. From a kinematic point of view, clamping fingers 3101108 participates in several functions of the main spindle group: it follows the rotation of the system driven by the spindle, works in the slots as a guided element, receives and transmits the thrust generated by the lever movement of bell 0801351, bears against sleeve 3160202, bushing 3101110 and ring 3101107, contributes to pullback of the clamping chain and allows controlled closure of bar clamping collets 9012E and 9017E. This function must remain coordinated with the spindle drum, bar feeding system, main spindles, possible front tool spindles, radial slides, axial slides and auxiliary machine systems, because any irregularity in bar gripping can affect subsequent stations and production continuity of the multi-spindle lathe. The clamping fingerss are important parts and wear components because they operate in areas subject to compression, rubbing and sliding; over time they may wear on the support surfaces, working edges, contact areas with the slots and guiding areas. Wear can increase play, worsen functional parallelism, make thrust irregular and reduce phase accuracy between command elements. For this reason, the component must be checked during replacement of clamping fingerss and during service work on sleeve 3160202, verifying the condition of contact surfaces, housing slots, support marks, edges and areas subject to compression and rubbing. If wear marks, deformation, steps, rounded edges, deep impressions or abnormal play are present, replacement of the clamping fingers becomes a necessary technical intervention to restore correct pullback kinematics and full efficiency of collet closure. For preventive and extraordinary maintenance departments, automatic turning shops, machine tool builders, automotive production and precision engineering, the 31.01.108 collet closing clamping fingers is a critical spare part for maintaining clamping reliability, main spindle stability and production continuity on Gildemeister DMG Mori GS20 and GM20AC multi-spindle lathes. Tadaah offers this component as a functional element of the clamping fingers sleeve and collet closing system, to be assessed not only for dimensional compatibility but also for its kinematic role in thrust transmission, group pullback and controlled closure of the 9012E and 9017E bar clamping collets.