Kennametal 6686930 Turning Insert DCGT3251LF KCS10B Carbide

Product Description

The KENNAMETAL 6686930 is a solid carbide turning insert with an AlTiN PVD coating, identified by industry standard code DCGT3251LF and ISO code DCGT11T304LF. It features a diamond (rhombic) 55-degree insert shape with a positive rake angle of 5 degrees and a 7-degree relief angle, making it well suited for finishing and light machining operations. The insert carries grade KCS10B and material grade S10, designed to deliver high wear resistance across a range of workpiece materials including stainless steel, superalloys, and titanium. With 2 cutting edges and a screw-on holding method, it offers a cost-effective solution for precision turning applications handled by machinists and CNC operators in production or job shop environments.

This insert is intended for use in turning, facing, boring, back turning, and back boring operations. Its primary workpiece material designations cover P, M, K, N, S, and H ISO material groups, making it applicable to steel, stainless steel, cast iron, aluminum, superalloys, and hardened materials. The LF chip breaker geometry is optimized for finishing and light machining cuts, producing controlled chip flow at tighter depth-of-cut ranges. It is compatible with screw-on style toolholders that accept DCGT-configuration inserts. Licensed machinists and CNC technicians working in precision component manufacturing will find this insert appropriate for tight-tolerance surface finish requirements.

Key Features

• AlTiN PVD coating provides high wear resistance on stainless steel, superalloys, and titanium
• Diamond (rhombic) 55-degree insert shape with positive rake and positive side clearance for free-cutting action
• LF chip breaker geometry optimized for finishing and light machining operations
• 2 cutting edges per insert; neutral hand orientation for flexible toolholder use
• Screw-on insert holding method for secure, repeatable indexing
• Honed cutting edge style reduces micro-chipping at edge during light cuts
• Multi-use application: turning, facing, boring, back turning, and back boring

Compatibility

Designed for use in screw-on style toolholders accepting DCGT-configuration inserts. Conforms to ANSI insert code DCGT3251 and ISO insert code DCGT11T304, allowing cross-reference with standard toolholder catalogs specifying those designations.

Installation Notes

Installation is performed by qualified machinists or CNC operators. Power down and lock out the machine spindle before indexing or replacing inserts. Seat the insert fully against the toolholder pocket before tightening the clamping screw to the toolholder manufacturer's specified torque; do not overtighten, as carbide inserts are brittle and can crack under excess clamp force. Confirm correct insert orientation and chip breaker direction relative to feed direction before resuming cuts.