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Big Daishowa Announces Inserts for Rough and Fine Boring Applications

Release Time：12 Jan,2026

Big Daishowa announces new negative inserts for its SW rough boring and EWN fine boring heads. These series feature proprietary six-edge designs to help machinists realize major productivity gains. The SW roughing heads use trigon-shaped ZN inserts, which help reduce consumable costs by increasing the number of cutting corners per insert. Insert grades focused on steel and cast iron maximize tool life in challenging applications like mold and die and large welded parts. The special cutting-edge preparation allows the insert to have a positive-geometry cutting action, so there’s no relative increase in cutting tool pressure and equal-to or better performance compared to traditional positive inserts. Customers can choose from two different ZN insert sizes and the range of insert holders available covers the boring range of ?1.260-8.00”. “At Big Daishowa, we’re focused on constant innovation when it comes to all of our products, and inserts are no exception,” says Alan Miller, senior engineering manager. “The never-before-seen design of the ZN insert embodies that; all to help our customers realize exciting productivity gains.”  The new triangle-shaped TN inserts were developed for the EWN fine boring heads and feature the same double-sided design and positive-geometry cutting edge. The TN insert holder program provides productivity boosts for the boring range of ?1.614-6.024”.