The success of stack drilling depends on the precise control of process parameters. Perfect adhesion between the plates is essential: any misalignment or vibration may cause burrs, hole ovalization, or premature tool wear. Using high-rigidity clamping systems, combined with industrial compensator shims of controlled thickness, ensures geometric stability and vibration damping, guaranteeing consistent results even with heterogeneous materials or non-planar surfaces.

During cutting, the tool is subjected to high axial loads, often in the range of several thousand newtons. Proper fixture design helps minimize elastic deformation and eliminate spring back, a common cause of cracks and micro-damage within the hole. Surface integrity is another critical factor: without adequate clamping, exit disks can shift, resulting in geometric imperfections and loss of quality.

In this context, the Stack Drills by Gaspari Utensili are specifically designed to deliver maximum performance in stack drilling operations. Each tool features a combined Weldon – Whistle Notch shank, ensuring firm holding and full compatibility with most CNC machine setups. The internal coolant system delivers a constant flow of refrigerant directly to the cutting zone, improving chip evacuation, reducing heat generation, and extending tool life even under demanding conditions.

The use of interchangeable ISO inserts allows quick diameter adjustments and easy adaptation to different materials — from aluminum alloys to high-strength steels — optimizing productivity without compromising quality. This leads to reduced machine downtime, greater operational flexibility, and lower overall production costs in both medium- and long-term operations.

The available range covers diameters from 27 mm to 59 mm, providing an immediate solution for a wide variety of manufacturing requirements. With a design that combines robustness, precision, and reliability, the Stack Drills by Gaspari Utensili offer an excellent solution for industries where hole quality and coaxial accuracy are paramount.

By choosing this technology, companies gain measurable advantages in productivity, repeatability, and quality, achieving a tangible economic return through shorter cycle times, reduced scrap, and longer tool life.

Contact Tadaah today for a personalized technical consultation or to receive information about the available range. Our experts are ready to help you choose the ideal tool for your production needs and optimize every step of your machining process.