Kennametal 1223429 Milling Insert K125M Solid Carbide

Product Description

The KENNAMETAL 1223429 is a solid carbide milling insert designed for precision metal removal in demanding machining applications. Manufactured to ISO code 4.81201R631, this square-shaped, single-sided insert carries a K125M grade designation and an uncoated bright finish, making it well suited for cutting operations where coating-induced edge buildup is a concern. With an inscribed circle of 0.5906 inches (12.00 mm) and a thickness of 0.2170 inches, the insert delivers consistent geometry across its cutting edges. It uses a screw-type holding method and is configured for right-hand operation. Machinists and toolroom technicians working with carbide toolholders in production environments are the primary installers.

This insert is rated for use in cast iron and non-ferrous metal applications, corresponding to ISO material grades K and N. It fits toolholder systems designed around the 4.81201 insert series with an insert size code of 631. Typical scenarios include face milling, shoulder milling, and profile milling operations on CNC machining centers or manual mills where a high-rigidity, uncoated carbide edge is preferred for clean chip evacuation and dimensional accuracy on cast iron components or aluminum alloys.

Key Features

• Solid carbide construction in manufacturer grade K125M, material grade C5
• Square insert shape with right-hand orientation for consistent edge engagement
• Uncoated bright finish suited for cast iron and non-ferrous metal cutting
• Inscribed circle of 0.5906 inches (12.00 mm) with a thickness of 0.2170 inches
• Screw-type insert holding method for secure seating in the toolholder pocket
• Single-sided insert design per ISO code 4.81201R631

Compatibility

Designed for use in toolholders built around the 4.81201 insert series, insert size code 631, accepting square solid carbide inserts with a 0.1969-inch hole diameter and an inscribed circle in the range of 0.4000 to 0.5000 inches.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before seating or replacing any insert. Use the appropriate torx or hex key to secure the clamping screw to the toolholder manufacturer's specified procedure without overtightening, which can crack the carbide body. Inspect the toolholder pocket and clamping screw for wear or debris before installing a fresh insert.