Sumitomo 196DCNG CNMG643EEM AC6040M Turning Insert

Product Description

The SUMITOMO 196DCNG is a CNMG-style indexable turning insert featuring the AC6040M grade with a PVD coating, designed for precision metal-turning operations on CNC lathes and turning centers. This insert carries a diamond (80-degree) shape with a neutral hand orientation, a 3/4-inch inscribed circle, and a 3/64-inch corner radius. The carbide substrate with PVD-applied coating delivers the edge integrity and heat resistance needed for consistent performance in demanding turning applications. It is installed and changed by machining professionals and skilled toolroom technicians.

The 196DCNG is optimized for turning stainless steel (ISO material group M), where controlled chip formation and edge stability are critical. The EEM chip breaker geometry is suited for general to semi-finishing passes on austenitic and other work-hardening stainless alloys. With a negative rake and CNMG insert style, this insert seats in standard CNMG-compatible toolholders using a clamp-and-pin holding method, making it a practical choice for production turning environments where repeatability and insert indexing speed matter.

Key Features

• AC6040M PVD-coated carbide grade optimized for stainless steel (ISO group M) turning
• EEM chip breaker geometry for controlled chip evacuation in semi-finishing to general turning
• 80-degree diamond insert shape (CNMG style) with negative rake for strong cutting edge
• 3/64-inch corner radius balances surface finish quality with edge strength
• Clamp and pin holding method for secure, repeatable seating in compatible toolholders
• Meets ANSI and ISO 13399 standards; ISO code CNMG190612N-EM

Compatibility

Designed to seat in standard CNMG-style toolholders that accept clamp-and-pin insert retention with a 3/4-inch inscribed circle and 1/4-inch insert thickness. Verify toolholder pocket geometry and seating angle before installation.

Installation Notes

Insert changes should be performed with the machine spindle stopped and all motion axes at rest. Use the appropriate torquing tool for the clamping screw per the toolholder manufacturer guidance. Inspect the insert pocket and locating pin for damage or debris before seating a new insert. Follow shop-specific lockout procedures before accessing the cutting zone.