Kennametal 1114909 Grooving Insert NG3125K KC850 Carbide

Product Description

The KENNAMETAL 1114909 is a solid carbide grooving insert in the NG3125K geometry, designed for external grooving and turning operations on CNC lathes and turning centers. Manufactured to KC850 grade with a CVD-applied TiC, TiCN, and TiN multilayer coating, this insert delivers wear resistance and thermal stability across a range of ferrous materials. It carries a left-hand cutting orientation, a 3.18 mm (0.1252 inch) cutting width, and a maximum depth of cut of 3.81 mm (0.1500 inch). The positive rake angle of 10 degrees and K-style chip breaker support controlled chip formation in medium to finish grooving passes. Licensed machinists and CNC operators working in production or job-shop environments are the primary installers.

This insert fits the Top Notch series toolholding system and is suited for grooving applications in residential and industrial machining contexts where consistent groove geometry and surface finish are required. The NG insert style with a 55-degree included angle and a 0.19 mm (0.0075 inch) corner radius makes it well suited for tight-tolerance external grooves on steel, cast iron, and similar materials falling within C5 and C6 material grade classifications. It is a metric-measurement insert sized at 3125, appropriate for moderate material removal depths in the 3.00 mm to 4.00 mm range.

Key Features

• KC850 grade solid carbide with CVD multilayer TiC, TiCN, and TiN coating for extended tool life
• 3.18 mm cutting width with a maximum depth of cut of 3.81 mm
• Positive 10-degree rake angle with K-style chip breaker for controlled chip evacuation
• Left-hand cutting orientation for dedicated left-hand toolholder setups
• 0.19 mm corner radius for precise groove profile definition
• Top Notch series compatibility for repeatable insert indexing and seating

Compatibility

Designed for use with Top Notch series toolholders accepting the NG insert style. Rated for C5 and C6 material grades. Verify toolholder hand orientation and pocket geometry before installation.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before seating or removing inserts. Use the manufacturer-specified torque driver for the insert clamping screw to ensure proper seating without cracking the carbide substrate. Inspect the toolholder pocket for chips or debris before installing a fresh insert.