Big Daishowa's new negative inserts for its SW rough boring and EWN fine boring heads feature proprietary six-edge designs to help machinists realize major productivity gains.

The SW roughing heads use trigon-shaped ZN inserts, which the company says 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 Ø1.260-8.00".

Alan Miller, senior engineering manager for Big Daishowa, says the ZN insert features a "never-before-seen design" that helps 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 Ø1.614-6.024".