Kennametal 1161911 Turning Insert Cpgt Tin Carbide

Product Description

The KENNAMETAL 1161911 is a solid carbide turning insert in the CPGT style, designed for high-precision finishing operations on CNC lathes and turning centers. It carries a PVD-applied TiN coating under the KC730 grade, which delivers high wear resistance across a range from moderate to demanding cutting conditions. The insert features an 80-degree diamond (rhombic) shape, a positive rake angle of 15 degrees, and an 11-degree relief angle, making it well suited for light, accurate passes where surface finish and dimensional control are the priority. The HP chip breaker geometry is optimized for finishing cuts, and the screw-on holding method provides secure, repeatable seating in compatible toolholders.

This insert is intended for turning, facing, and boring operations on steel, stainless steel, and cast iron workpieces, with secondary capability on superalloys and titanium. The KC730 grade is rated for high wear resistance to moderate wear resistance and toughness across P, M, and K material classifications. It is a neutral-hand insert, fitting either left- or right-hand toolholder pockets of the appropriate style. Licensed machinists and CNC operators in job shop, production, and maintenance turning environments are the typical installers. The 0.3808-inch insert length and 0.375-inch inscribed circle place it in a common mid-small size range for precision finishing work.

Key Features

• KC730 grade with PVD TiN coating for high wear resistance on steel and stainless steel
• 80-degree diamond (rhombic) insert shape with positive rake for reduced cutting forces during finishing
• HP chip breaker geometry optimized for finishing chip control and surface quality
• Screw-on insert holding method for secure, repeatable seating
• Honed cutting edge style for consistent edge integrity on finish passes
• Two cutting edges per insert; neutral hand for versatile toolholder compatibility
• Maximum depth of cut of 0.0492 inches (1.25 mm) per finishing application guidelines

Compatibility

Designed for use in CPGT-style screw-on turning toolholders accepting a 3/8-inch inscribed circle (ANSI size code 3251, ISO size code 09T304). Meets ANSI and ISO insert standards. Suitable for turning, facing, and boring applications on steel, stainless steel, cast iron, superalloys, and titanium workpieces.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Always power down and lock out the machine spindle before changing inserts. Use the correct torx or hex key specified for the toolholder screw to avoid stripping the insert pocket; do not overtighten, as this can crack the carbide insert body. Inspect the toolholder pocket and seating surface for chips or debris before seating the new insert to ensure proper support and accurate geometry presentation.