Kennametal 1183574 Ceramic Turning Insert RNG43T0820

Product Description

The KENNAMETAL 1183574 is a round ceramic turning insert in the KENDEX series, designed for high-speed machining of cast iron workpieces. It carries the industry standard designation RNG43T0820 and is manufactured in the KY3500 grade, a silicon nitride ceramic formulation that delivers high wear resistance with moderate toughness. The insert features a flat top chip breaker geometry, a T-land cutting edge style, and a negative rake angle with neutral hand orientation. With 8 available cutting edges per insert, it offers efficient tool life management in production turning environments. Licensed machinists and CNC operators working in job shop or production settings are the primary installers.

This insert is suited for turning, facing, and boring operations on cast iron components in both roughing and finishing applications where wear resistance is the priority. The RNG43T0820 designation corresponds to ANSI size code 43 and ISO size code 120400. It fits toolholders designed for round RNG-style inserts with a 0.5 inch inscribed circle. The flat top geometry and negative side clearance make it well-matched for rigid, high-speed cast iron passes where insert security and edge integrity are critical.

Key Features

• Silicon nitride ceramic grade KY3500 — optimized for high wear-resistance to moderate wear-resistance and toughness on cast iron (K-grade material)
• Round insert shape (R) with full radius geometry and 0.5 inch inscribed circle
• 8 cutting edges per insert with neutral hand orientation for flexible toolholder use
• Flat top chip breaker and T-land cutting edge style for controlled engagement on cast iron
• Negative rake and negative side clearance for secure clamping and edge stability at elevated cutting speeds
• Uncoated bright finish — no coating variability, consistent ceramic substrate performance
• Multi-use capable: turning, facing, and boring from a single insert geometry

Compatibility

Designed for use in RNG-style round insert toolholders with a 0.5 inch inscribed circle, accepting ANSI size code 43 (ISO 120400) inserts with a clamp-type insert holding method. Suitable for cast iron primary workpiece material. Verify toolholder pocket geometry and clearance code N compatibility before installation.

Installation Notes

Installation is performed by qualified machinists or tooling technicians following machine tool lockout/tagout procedures before any insert change. Ensure the toolholder pocket is clean and free of chips or debris before seating the insert. Use the appropriate torque wrench and clamping hardware specified by the toolholder manufacturer — do not overtighten the clamp screw. Inspect the cutting edge and seating surface before engaging the workpiece.