Floating tap holders with extension and compression, featuring ERC collet and Morse taper shank, represent an advanced technical solution for threading operations on machine tools. They are designed to ensure high thread quality, process reliability, and a significant reduction in tool breakage risk. This system is particularly suitable for applications on single-spindle and multi-spindle lathes, CNC machining centers, drilling machines, and transfer lines, where synchronization between feed and rotation is not always perfectly controlled.

The operating principle is based on a floating system with bidirectional axial compensation, allowing both extension and compression movements. The extension stroke (E = 12 mm) compensates differences between machine feed and thread pitch during forward motion, while the compression stroke (C = -4 mm) acts during reversal phases, reducing stress on the tool. This dual compensation system ensures optimal force management throughout the entire tapping cycle.

Internal springs allow axial movement of the tap, while a slight controlled radial play compensates misalignment errors between spindle and workpiece. This combination of axial and radial compensation improves thread quality, reduces misalignment issues, and ensures stable machining even under non-ideal conditions.

The system is designed for use with ERC collets according to DIN 6499/B (ERC25, ERC32, ERC40), offering wide flexibility depending on tap diameter and application requirements. The different configurations provide an optimal balance between system rigidity and compensation capability.

From a construction standpoint, the tap holders are manufactured from certified high-alloy steel, heat-treated and fully ground to ensure wear resistance, geometric precision, and long-term stability. The entire production process is carried out in Italy using high-precision machine tools and strict quality control procedures.

These tap holders are widely used in automotive, industrial manufacturing, precision engineering, and subcontract machining. They are ideal for intensive production cycles where thread quality, reduced scrap, and extended tool life are critical factors.

Selection should consider taper type (Morse taper), ERC collet size, and operating conditions, especially in threading processes requiring synchronization compensation. Thanks to the dual axial compensation system, this solution offers high reliability and versatility for technicians, CNC operators, and process engineers.