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The KENNAMETAL 4175838 is a solid carbide grooving insert designed for precision external grooving operations on CNC lathes and turning centers. Running in the Top Notch series with a KCU10 grade and PVD-applied AlTiN coating, this insert delivers high wear resistance and thermal stability during interrupted and continuous cuts. The right-hand configuration features a 4.80 mm (0.1890 inch) cutting width, a maximum depth of cut of 6.35 mm (0.2500 inch), and a corner radius of 0.57 mm (0.0225 inch). Machinists and tool crib technicians working with C3 and C4 material grades will recognize this insert as a production-grade consumable suited to high-volume turning applications.
This insert is intended for use in turning and grooving applications on ferrous and non-ferrous workpieces where tight groove tolerances and consistent surface finish are required. It is a single-end insert held in place by a clamp-style toolholder and carries an NGD insert style designation with an insert seat size of 3. Typical installations include external grooving, parting-adjacent operations, and profiling on production lathes in both job shop and high-volume manufacturing environments.
Designed for use with Top Notch series clamp-style grooving toolholders that accept an NGD insert style with insert seat size 3. The MSC/Manufacturer cross-reference number is NGD3189R/LK.
Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before indexing or replacing any insert. Seat the insert fully against the toolholder pocket and confirm the clamp is torqued according to the toolholder manufacturer specification before resuming cuts. Inspect the clamp and insert pocket for chips or damage each time the insert is changed.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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