Kennametal 6231857 Grooving Insert EG3GUN KCU25 Carbide

Product Description

The KENNAMETAL 6231857 is a solid carbide grooving insert designed for precision external grooving and parting operations on CNC lathes and turning centers. Manufactured to the EG3GUN geometry in grade KCU25, this neutral-hand insert features a 0.125 inch cutting width, a maximum depth of cut of 0.087 inches, and a corner radius of 0.016 inches. The Al2O3 coating is applied via PVD process, delivering a hard, wear-resistant surface suited to interrupted cuts and abrasive workpiece materials. The insert belongs to Kennametal's Beyond Evolution series, which targets consistent edge life in steel, stainless, and cast iron grooving applications. It is installed by machinists and CNC tooling technicians in production and job-shop environments.

This insert is intended for use in compatible EG-style grooving toolholders and blade systems that accept size 3 inserts with a 0.125 inch cutting width. Typical applications include external grooving, undercuts, snap-ring grooves, and face grooving on turned components. The neutral hand orientation allows use on both right-hand and left-hand setups depending on holder configuration. The GUN chip breaker geometry promotes chip control in moderate to light depth-of-cut grooving passes. Sold individually; minimum order quantity is 5 units per order.

Key Features

• EG3GUN geometry with GUN chip breaker for controlled chip evacuation in grooving operations
• KCU25 grade solid carbide substrate with Al2O3 PVD coating for wear resistance
• 0.125 inch cutting width with maximum depth of cut of 0.087 inches
• 0.016 inch corner radius for sharp, defined groove shoulders
• Neutral hand orientation compatible with both right-hand and left-hand toolholder configurations
• Beyond Evolution series design targeting consistent edge performance in steel and stainless grooving

Compatibility

Designed for use in EG-style grooving toolholders and blade systems that accept size 3 inserts with a 0.125 inch cutting width. Confirm holder and blade compatibility with insert style EG and the specified cutting width before installation.

Installation Notes

Insert seating and clamping should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing inserts. Ensure the insert pocket and clamping screw are free of chips and debris before seating the insert to prevent rocking or improper engagement. Do not exceed the maximum depth of cut specified for the insert and holder combination.