Value Collection VNMG160404 Turning Insert Carbide I55

Product Description

The VALUE COLLECTION VNMG160404 is a solid carbide turning insert designed for external and internal turning operations on CNC lathes and manual turning centers. It conforms to the ISO insert designation VNMG160404 and the ANSI code VNMG331, featuring a 35-degree diamond (rhombic) shape with a negative side clearance and a manufacturer grade of I55. The insert is uncoated (bright finish), making it suitable for applications where coating is not required or where a post-coat grind is preferred. A licensed machinist or CNC operator typically specifies and installs this insert as part of a toolholder assembly in production or job-shop turning environments.

This insert is applied in metal cutting operations targeting primary workpiece materials classified under ISO material group P, which covers carbon steels, alloy steels, and ferritic stainless steels. The G-style chip breaker geometry supports controlled chip formation across a range of depths of cut and feed rates. Its 3/8-inch inscribed circle and 1/64-inch corner radius make it appropriate for medium-duty roughing to semi-finishing passes. It is held in place using a clamp-and-pin method, common in VNMG-compatible toolholders.

Key Features

• 35-degree diamond (rhombic) insert shape for low cutting forces and access in tight toolpaths
• Solid carbide construction with bright uncoated finish, grade I55
• Negative side clearance (N) with tolerance code M for secure, repeatable seating
• G-style chip breaker for controlled chip evacuation on P-group steels
• Clamp-and-pin holding method compatible with standard VNMG toolholders
• 1/64-inch corner radius for a balance of edge strength and surface finish

Compatibility

Designed as an OEM-style replacement or direct-fit insert for toolholders accepting VNMG331 (ANSI) or VNMG160404 (ISO) inserts with a clamp-and-pin holding method and a 0.150-inch hole diameter.

Installation Notes

Installation is performed by a machinist or CNC tooling technician. Always power down and lock out the machine spindle before changing inserts. Seat the insert fully against the toolholder pocket locating surfaces before tightening the clamp to avoid micro-movement under cutting loads. Inspect the toolholder pocket for chips or debris before seating a new insert, as contamination can affect insert stability and surface finish.