Grade Features Positive Inserts for Difficult Turning

A line of positive inserts have been incorporated into Tungaloy's AH905 grade for turning super alloys and other difficult-to-machine materials in the aerospace and power-generation industries. Featuring PremiumTec surface technology, the inserts improve productivity by preventing chip adhesion and improving chip flow. AlTiN PVD coating improves wear resistance for consistent performance and increased tool life. The inserts are available with six types of chipbreakers for medium to finish-cutting applications. These chipbreakers include PSF, PSS, PS, RS, 61 and all-round chipbreaker types.

The PSF is designed for machining with low cutting forces and is well-suited for finish-turning operations, the company says. It can turn at low depths of cut to decrease the potential for chip-control issues.

The PSS chipbreaker is well-suited for light machining and internal turning operations, the company says. The PS geometry is an “M” class insert developed for highly productive boring operations.

To accommodate light to medium cutting of super alloys, the RS and 61 chipbreakers have been applied in round inserts. The RS adopts a large rake angle to optimize chip control, while the 61 offers high-feed turning at small depths of cut. The company’s all-round chipbreaker is suited for a range of continuous and interrupted machining processes, generating low cutting forces with improved chipping resistance.