Hertel 8850555 Turning Insert DNGA431T00625 HP610CA

Product Description

The HERTEL 8850555 is a ceramic turning insert designed for precision metal cutting on CNC lathes and turning centers. It carries the DNGA431T00625 geometry with an HP610CA manufacturer grade and a PVD-applied TiN coating over a ceramic substrate. The insert features a 55-degree diamond shape, neutral hand orientation, and a 1/64 inch corner radius. These characteristics make it suited for high-speed finishing and semi-finishing passes on hardened ferrous materials where heat resistance and edge integrity are critical. The insert is installed by qualified machinists and toolroom technicians working with compatible DNGA-style toolholders.

This insert is intended for turning operations on hardened steels, cast irons, and similar materials where ceramic cutting tools outperform carbide in terms of heat resistance and cutting speed. The neutral hand orientation allows use in both left-hand and right-hand toolholder configurations. The DNGA insert style with clamp and pin holding method is commonly found in production turning environments, both job shop and high-volume manufacturing. The 55-degree included angle provides good nose strength for interrupted and continuous cut conditions at elevated surface speeds.

Key Features

• Ceramic insert material with PVD TiN coating for extended tool life at high cutting speeds
• 55-degree diamond insert shape with negative rake for increased edge strength
• Neutral hand orientation compatible with left-hand and right-hand toolholders
• 1/64 inch corner radius for finishing and semi-finishing surface quality
• Clamp and pin holding method for secure seating in DNGA-style toolholders
• DNGA431T00625 geometry with HP610CA grade for high-speed hard-material turning

Compatibility

Designed as an OEM-style replacement turning insert for DNGA-style toolholders accepting a 55-degree diamond insert with clamp and pin holding.

Installation Notes

Turning inserts are seated and replaced by machinists following standard toolholder manufacturer procedures. Before changing an insert, ensure the machine spindle is fully stopped and all motion is locked out per shop LOTO procedures. Use the correct torque wrench and seating pin as specified by the toolholder manufacturer when securing the clamp. Inspect the insert pocket and seating surfaces for wear or debris before installing a new insert.