The 35.01.131 main spindle clamping finger sleeve is a precision mechanical component designed for Gildemeister DMG Mori GM35 and GM35AC multi-spindle lathes, used in the bar clamping system for machining bars up to 35mm maximum diameter with 9069E bar clamping collet. The main function of the sleeve is to receive rotation from the main spindle and act as the operating support for the 3501130 clamping fingers, which through their mechanical action push on bushing 3501119 and bell 3501132, generating the pullback movement required for collet closure. In this group, the sleeve is not merely a support element but a kinematic component that connects main spindle rotation with the bar closing control mechanism, maintaining alignment, motion continuity and correct load transmission between clamping fingers, bushing, bell and collet. During the working cycle, rotation from the main spindle is transferred to the sleeve, while the 3501130 clamping fingers housed in the component act as thrust and control elements; their action on bushing 3501119 and bell 3501132 causes controlled pullback of the system, allowing collet 9069E to close on the bar. This sequence requires correct seat geometry, intact contact surfaces and absence of abnormal play, because even slight wear in the clamping finger contact area can change the useful stroke, alter load distribution and reduce closing repeatability. In the variant for bars up to 35mm, the component works with high masses and inertia, so stability of the clamping kinematics is essential to prevent micro slipping, vibration, loss of closing force, concentricity errors, cutting instability and dimensional variations during machining. From a functional point of view, sleeve 3501131 participates in several kinematic functions of the machine: it receives and follows main spindle rotation, houses and guides clamping fingers 3501130, allows thrust transmission toward bushing 3501119 and bell 3501132, contributes to the pullback movement required to close collet 9069E and keeps the clamping group behavior coordinated with the spindle drum, bar feeding system, radial slides, axial slides, front tool spindles and auxiliary machine systems. Stable and correctly controlled bar gripping allows subsequent operations to maintain dimensional accuracy, correct geometry, good surface finish and cycle repeatability across all stations. Conversely, a sleeve worn in the clamping finger support area can create irregular contact points, loss of functional parallelism, play during the thrust phase, localized impacts and uneven collet closure. For this reason, the component is carefully inspected during replacement of clamping fingers 3501130, checking the condition of the seats, support surfaces and areas subject to compression and rubbing. If deep marks, deformation, ovalization, localized wear or reduction of the effective contact surface are present, replacement of the sleeve becomes necessary to restore the correct pullback movement and full efficiency of the bar clamping system. For preventive and extraordinary maintenance departments, machine tool builders, automatic turning shops, automotive production and precision engineering, the 35.01.131 clamping finger sleeve is a critical spare part for maintaining reliability, mechanical safety and production continuity on Gildemeister DMG Mori GM35 and GM35AC multi-spindle lathes. Tadaah offers this component as a functional part of the main spindle group, to be assessed not only for dimensional compatibility but also for its kinematic role in rotation transmission, clamping finger control and controlled closure of the 9069E bar clamping collet.