Big Daishowa Enhances Machining Efficiency with Advanced Six-Edge Boring Inserts!


Friday 10 April 2026, 5:42:44 PM


Big Daishowa has introduced a new range of negative inserts designed for its SW rough boring and EWN fine boring heads, aimed at significantly improving productivity and cost efficiency in machining operations. These inserts feature a six-edge design, allowing machinists to maximise tool usage while reducing downtime and consumable costs.

At the core of this innovation are the trigon-shaped ZN inserts used in the SW rough boring heads. Unlike conventional inserts, these are engineered with multiple cutting edges, enabling operators to utilise more corners per insert before replacement is required. This directly translates into lower tooling costs and improved operational efficiency, particularly in high-volume or demanding machining environments.

The inserts are specifically developed for machining materials such as steel and cast iron, making them well-suited for challenging applications including mould and die production as well as large welded components. Their design focuses on extending tool life without compromising on performance, even under high-load conditions typically encountered in heavy-duty machining.

One of the standout features of these inserts is their specialised cutting-edge preparation, which delivers a positive-geometry cutting action despite being negative inserts. This ensures smoother cutting performance without increasing cutting pressure on the tool. As a result, users can achieve performance levels equal to or better than traditional positive inserts, while benefiting from the durability and extended life associated with negative insert designs.

To offer flexibility across a wide range of applications, Big Daishowa provides the ZN inserts in two different sizes. Combined with a variety of insert holders, the system can accommodate boring diameter ranges from 1.260 inches to 8.00 inches. This versatility makes the solution adaptable for different machining setups and requirements.

In addition to rough boring, Big Daishowa has also developed triangle-shaped TN inserts for its EWN fine boring heads. These inserts feature the same double-sided, multi-edge design and positive-geometry cutting edge, ensuring consistent performance across both roughing and finishing operations. The TN insert holders are designed to cover boring diameters ranging from Ø1.614 inches to 6.024 inches, offering precision and efficiency in fine machining tasks.

Overall, this latest development highlights Big Daishowa’s focus on delivering practical, performance-driven tooling solutions. By combining extended tool life, reduced consumable costs and enhanced machining performance, these new inserts provide manufacturers with a competitive edge in improving productivity on the shop floor.



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