Hertel 8852034 Turning Insert CNGG4302NR HT115CR Cermet

Product Description

The HERTEL 8852034 is a cermet uncoated turning insert in the CNGG style, designed for precision metal cutting operations on CNC lathes and turning centers. This right-hand insert features an 80-degree diamond shape with a negative rake angle and a 0-degree relief angle, suited for finishing and semi-finishing passes on ferrous materials. The insert measures 0.4724 inches in length with a 0.5 inch inscribed circle and a 0.0039 inch corner radius, providing tight tolerances for close-tolerance turning work. The HT115CR grade cermet substrate delivers wear resistance and thermal stability without a coating, making it well suited for dry or light-coolant finishing cuts. Licensed machinists and CNC operators are the typical installers of this insert.

This insert is appropriate for use in light finishing and semi-finishing turning applications on steel and cast iron workpieces where dimensional accuracy is critical. The CNGG430.2R style designation indicates compatibility with standard CNGG-style toolholders and clamp-and-pin holding systems commonly used in production turning environments. It is particularly effective at moderate cutting speeds where the cermet substrate resists built-up edge and maintains a sharp, consistent cutting edge through extended runs.

Key Features

• Cermet uncoated substrate in manufacturer grade HT115CR for dry and light-coolant finishing
• 80-degree diamond insert shape with negative rake for stable cutting geometry
• 0.0039 inch corner radius for fine surface finish on close-tolerance workpieces
• 0.5 inch inscribed circle and 0.4724 inch insert length for standard CNGG toolholder fitment
• Clamp and pin holding method for secure seating in compatible toolholders
• G chip breaker style for controlled chip formation during finishing passes

Compatibility

Designed for use in standard CNGG-style toolholders utilizing clamp and pin insert retention. Compatible with right-hand turning applications requiring CNGG430.2R inserts with a 0.203 inch hole diameter.

Installation Notes

Installation is performed by qualified CNC machinists or toolroom technicians. Before changing inserts, ensure the machine spindle is fully stopped and the machine is placed in a safe, locked-out state per applicable shop safety procedures. Use the correct clamp and pin hardware specified for the toolholder to ensure proper seating; do not over-tighten clamping screws beyond the toolholder manufacturer's specified procedure. Inspect the insert pocket and locating pin for wear or debris before seating the new insert.