The 035300 barloader collet for Cucchi Pietro PB30 automatic bar feeder is a professional mechanical component designed for correct bar advancement during machining operations on automatic lathes, CNC lathes and sliding headstock CNC machines. Its function is to connect the pushing system of the barloader to the material being fed, maintaining stable, controlled and repeatable contact throughout the cycle. The configuration with M18 x 1.5 LH thread and OD= 30 mm makes this collet suitable for use on Cucchi Pietro PB30 barloaders, in production environments where feeding continuity, positioning accuracy and machine reliability are essential to prevent downtime, feeding errors or bar instability.

The product works as a gripping and pushing element between the barloader and the bar. During the automatic cycle, the collet guides the material toward the spindle or toward the machine clamping device, contributing to regular advancement and correct management of the bar remnant at the end of machining. A correctly selected barloader collet reduces slipping, vibration, irregular dragging and misalignment, especially in machining operations on sliding headstock CNC lathes, where material stability and feeding repeatability directly affect dimensional accuracy, surface finish and tool life.

The collet can be supplied for round, hexagonal or square bars. For hexagonal and square profiles, the internal grinding is carried out according to the corner dimension, so that the coupling matches the real bar section and provides suitable grip during the feeding movement. The bore can be produced in whole size, e.g. 15 mm, or in decimal size, e.g. 15.30 mm, depending on the actual material diameter, bar tolerance and required working conditions. This option makes it possible to optimise contact between collet and material, reduce excessive clearance and improve cycle stability.

The collet must be selected by evaluating the barloader model, connection type, thread, outside diameter, bar profile, nominal diameter, actual material size, remnant length, feeding speed, spindle line height, alignment between barloader and lathe and the clearance present in the pushing transmission. To obtain precise operation, it is advisable to check that the collet matches the real bar diameter and that there is no wear on the gripping areas, abnormal elastic deformation, burrs, irregular contact marks or loss of concentricity. Insufficient grip can cause slipping and non-repeatable feeding, while excessive closing force can mark the material or alter movement regularity.

In industrial applications this collet is used in turning shops, CNC workshops, automated production departments, bar machining companies, automatic lathe maintenance and technical laboratories that need to ensure feeding continuity over repetitive cycles. It is intended for technicians, engineers, maintenance specialists, production managers, CNC operators and quality control departments that need to keep the connection between barloader and lathe efficient. The collet is not a measuring instrument in the strict sense, but its correct application requires accurate dimensional and geometric checks, because bar diameter, coaxiality, guide wear, pushing adjustment and working height directly influence the accuracy of the complete system.

During replacement it is recommended to verify the code, product family, compatibility with the Cucchi Pietro PB30 barloader and correspondence between the required size and the material actually used in production. Regular maintenance, including cleaning of the seats, wear inspection, bore check and alignment control, helps reduce machine downtime, production scrap, feeding errors and problems related to the quality of the grip on the bar. Tadaah offers this collet with a technical approach focused on correct spare part identification and support in choosing the most suitable size, providing useful content for preventive maintenance, scheduled replacement and optimisation of bar feeding system reliability.