Kyocera Precision Tools has developed a new line of indexable drills to be used mainly for holemaking in the machine tool business. Ideal for the automotive, aerospace and medical device industries, the new DRV Magic Drills combine a chemical vapor deposition (CVD) coated insert on the outside cutting edge and a physical vapor deposition (PVD) coated insert on the inside cutting edge. This allows for high-speed machining and excellent drilling precision.
The newly developed insert chipbreakers improve chip evacuation and the holder’s thicker center core provides greater rigidity. The DRV Magic Drills can reach depths from 2xD up to 6xD (six times the cutting diameter). Kyocera aims to increase customers’ productivity by broadening its product lineup for more diversified applications.
Reducing weight and providing greater functionality of components are currently being promoted in the automotive, aerospace and medical device industries. This trend increases the demand for products that can provide high-speed and high-efficiency drilling of different workpiece materials under various drilling conditions. With previous indexable drills, PVD-coated inserts were used for both the outside and inside cutting edges. This created the disadvantage of increased wear and tear on the outside insert which moves at a higher speed across the workpiece material than the inside insert. To solve this issue, the new DRV Magic Drill model uses a CVD-coated insert with heat and wear resistance for the outside cutting edge and a PVD-coated insert for the inside cutting edge. This creates stable machining even when higher cutting forces are applied to the inside cutting edge. By taking advantage of both CVD and PVD coatings, the DRV Magic Drill maintains better stability and longer tool life.
1. High-speed and high-efficiency processing of various materials
Kyocera offers 4 unique chipbreaker designs to cover a wide range of machining applications. The inserts are designed with 4 usable cutting edges to reduce customers’ machining costs.
2. Unique cutting edge design for excellent chip evacuation even at deep drilling depths – 33% larger web thickness for stable drilling at depths up to 6xD
The outside cutting edge has a “U-shaped” design that provides smooth chip evacuation and compact chips that prevent chip clogging. The inside cutting edge has a “spoon-shaped” design to reduce cutting forces for smoother chip evacuation even at 6xD drilling depths. With better chip flow, the holder body’s flutes (grooves) were designed in a way that allows for a 33 percent larger web thickness when compared to competitors’ products*1. A high-rigidity holder body with low cutting resistance provides stable indexable drilling at up to 6xD depths.
*1 Based on research by Kyocera