Kennametal 3753641 RNMG43RN KCP30 Round Turning Insert

Product Description

The KENNAMETAL 3753641 is a round RNMG43RN turning insert in the KCP30 carbide grade, designed for external turning, facing, and boring operations on CNC and manual lathes. The insert carries a multilayer MTCVD coating sequence of TiN, TiCN, and Al2O3, targeting moderate to high wear resistance with sufficient toughness for interrupted and continuous cuts in steel and stainless steel. With a 0.5000-inch inscribed circle, a 0.2500-inch corner radius, and 8 usable cutting edges, this insert delivers a high edge count per unit, keeping tooling cost per edge competitive in high-volume turning cells. It belongs to KENNAMETAL's KENLOC series and carries an RN chip breaker geometry rated for roughing and medium machining applications.

This insert is suited for roughing and medium-duty turning of steel (ISO P) and stainless steel (ISO M) workpieces in both job-shop and production environments. The round insert shape provides a full-radius cutting profile, making it effective for profiling passes and contour turning where a continuous edge geometry is required. It accommodates both clamp and pin holding methods, fitting standard RNMG-style toolholders. Multi-use applications include turning, facing, and boring, making it a versatile choice for operators running varied part geometries on a single setup. The neutral hand designation means it seats in standard neutral-handed RNMG toolholders without restriction.

Key Features

• Round insert shape (RNMG) with full radius and 8 cutting edges for maximum edge utilization
• KCP30 grade with multilayer MTCVD coating (TiN / TiCN / Al2O3) for wear resistance in steel and stainless steel
• RN chip breaker geometry rated for roughing and medium machining operations
• 0.2500-inch corner radius and 0.5000-inch inscribed circle for robust depth-of-cut capability
• Compatible with both clamp and pin holding methods in standard RNMG toolholders
• Chamfered and honed cutting edge preparation for edge strength and surface finish consistency

Compatibility

Designed as an OEM-style replacement fitting standard RNMG43-style turning toolholders. Compatible with clamp or pin holding systems. Verify toolholder bore and seating pocket dimensions against ANSI insert code RNMG43 and ISO insert code RNMG120400 before installation.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully in the toolholder pocket and confirm the clamp or pin is secure before resuming cuts. Do not exceed the maximum depth of cut of 0.0492 inches (1.25 mm) as recommended for this insert geometry.