Features 1、0.01mm body accuracy with high concentricity, the processing effect is good, the efficiency is improved, and the service life of the tool is prolonged 2、Advanced vacuum quenching furnace, can achieve carbonitriding, improve the hardness of the tool holder and the accuracy 3、Inner hole is finely ground to be bright, and it is ground by the self‑developed grinding stone 4、All tool holders contain high‑accuracy ball guide sleeves, reducing wear and possess a higher concentricity, which can protect the product from excessively fast feeding and retraction of the product due to tapping, breaking of the tap and deformation under pressure control 5、Improving tap life, reduce machine tool parameter requirements, improve thread accuracy and surface quality, possess torsion overload protection function 6、Support micro‑compensation synchronous tapping, improving processing efficiency, optimization of extrusion taps, higher suitable for processing fine teeth and inch teeth Specification Item Type: Tapping Holder Model: BT40-GT24-130L Material: High speed steel Purpose: CNC machining center tapping tool holder Tool Handle Length: Approx. 130mm / 5.1in Size of Chuck: Approx. 30mm / 1.2in Maximum Diameter of Handle Taper: Approx. 44.45mm / 1.8in Tapping Range: M5-M30 Applicable Chuck: GT24 GT12 Function: Used for clamping during thread processing. The telescopic tapping tool holder can shrink back and forth by 5mm through the internal protection mechanism, which can protect the tap when it is overloaded and stopped. Package List 1 x Tapping Holder