The SH16 034116 quick-change collet is a technical component for FMB, TRAUB, HAGENUK, IEMCA, ROBOBAR, LNS, SAMECA, MINISPRINT and MINITURBO automatic bar feeders, with 16 mm outside diameter. Its function is to grip the bar, guide it correctly and transmit the feed movement generated by the bar feeder towards the lathe. It is used on automatic lathes, single-spindle lathes, multi-spindle lathes, CNC lathes and Swiss-type CNC machines, where feeding stability, gripping quality and correct material position in relation to the machine axis are essential to maintain production continuity, dimensional accuracy and machining-cycle reliability.

The SH16 quick-change version is designed to make collet replacement more efficient during diameter changes or production changeovers, reducing downtime and simplifying bar feeder setup operations. In an automatic bar feeding system, quick replacement must be combined with stable and repeatable gripping, because a collet that is not correctly selected or not consistent with the material geometry can cause slipping, irregular feeding, vibration, sticking and loss of reference during the cycle. The collet works as the connecting element between the feeder pusher tube and the bar to be fed, contributing to feed regularity and reduced transmission backlash.

The SH16 034116 collet should be selected by considering the installed bar feeder, compatibility with the quick-change system, 16 mm outside diameter, nominal or real bar diameter, material profile, spindle-line height, alignment between bar feeder and lathe, condition of the pusher tube, guides, bushings and backlash in the feed transmission. The actual bar size and its tolerance must be checked carefully, because the correct match between collet and material directly affects gripping quality, dragging continuity, cycle stability and the reduction of form errors, surface-finish defects and micro-movements during automatic feeding.

Feed finger collets and quick-change collets can be supplied for round, hexagonal or square bars. For profiled bars, grinding is carried out according to the corner dimension rather than a generic diameter, so that the gripping surface matches the real geometry of the material. This dedicated machining is important to prevent irregular contact, loss of centring, vibration and localised wear on the contact surfaces. For hexagonal or square profiles, correct evaluation of the corner dimension allows the collet to distribute the grip more effectively and keep the material stable during feeding, stopping and restarting phases of the bar feeder.

From an operational and maintenance point of view, the collet should be checked periodically for integrity of the gripping surfaces, absence of burrs, abnormal elastic deformation, irregular contact marks, loss of concentricity and correct engagement in the quick-change system. It is also advisable to check axial settings, feeder height, alignment with the spindle, pusher tube, bushings and guides, because feeding precision depends on the interaction of all these elements and not only on the individual component. A worn collet or a collet not consistent with the bar profile may cause noise, vibration, discontinuous feeding, positioning errors and quality problems on the machined part.

The SH16 034116 quick-change collet for FMB, TRAUB, HAGENUK, IEMCA, ROBOBAR, LNS, SAMECA, MINISPRINT and MINITURBO bar feeders is suitable for machine shops, bar turning companies, CNC departments, single-spindle and multi-spindle lathe production, maintenance specialists, machine builders, laboratory technicians, process engineers and quality control managers. It is a professional spare part used to maintain the efficiency of the feeder system and to improve continuity, reliability and precision in automatic production. Tadaah offers this component with attention to technical compatibility and application support, helping select the correct collet according to the installed feeder, required diameter, bar geometry and real working conditions.