Iscar 6817926 Cbn Turning Insert CNGA432-M2 IB10H

Product Description

The ISCAR 6817926 is an uncoated cubic boron nitride (CBN) turning insert in the Isoturn series, designed for precision single-point turning of hard materials. It carries an 80-degree diamond shape (insert shape code C) with a CNGA style and IB10H manufacturer grade. The insert measures 12.90 mm (0.508 inches) in length with a 0.5-inch inscribed circle and a 1/32-inch (0.0313-inch) corner radius. With a multi-tipped, fine-grain CBN construction and an M2 chip breaker, it is built for controlled finishing and semi-finishing passes on hardened steels, cast irons, and similar hard workpiece materials. Licensed machinists and CNC tooling specialists are the primary installers of this insert type.

This insert is suited for CNC turning centers and lathes running hard materials where CBN outperforms conventional carbide tooling. The CNGA 432-M2 geometry (ISO code CNGA 432-M2, conforming to ISO 13399) fits standard CNGA-style toolholders that accept a clamp and pin holding method. The 0.30 mm (0.0120-inch) maximum depth of cut makes it appropriate for light, precise finishing operations rather than heavy roughing passes. It is a single-end insert with a clearance code of N and tolerance code of G, supporting consistent, repeatable insert indexing in production turning environments.

Key Features

• Cubic boron nitride (CBN) insert material optimized for turning hardened and difficult-to-cut materials
• 80-degree diamond insert shape with M2 chip breaker geometry for controlled chip flow on finishing cuts
• Uncoated IB10H fine-grain CBN grade for thermal stability and edge integrity at elevated cutting temperatures
• Multi-tipped construction provides additional usable cutting edges per insert
• Clamp and pin holding method ensures secure seating in compatible CNGA toolholders
• Conforms to ISO 13399 for standardized insert identification and toolholder compatibility

Compatibility

Designed as a direct-fit replacement for CNGA-style toolholders accepting a clamp and pin holding method, with an 80-degree diamond insert shape and 0.5-inch inscribed circle. Compatible toolholders must accommodate the CNGA 432 insert size code. Verify toolholder specifications against ISO 13399 data before installation.

Installation Notes

Insert seating and indexing should be performed by a qualified machinist or CNC tooling technician with the machine fully powered down and the spindle locked before changing inserts. Use the appropriate torque wrench and clamp hardware specified by the toolholder manufacturer — do not over-tighten the clamping screw, as CBN inserts are brittle and susceptible to fracture under uneven clamping load. Inspect the insert pocket and locating pin for debris or damage before seating a new insert. Follow the toolholder manufacturer guidelines for clamping sequence and confirm insert is fully seated before resuming machine operation.