Kennametal 6686923 CPMT3251MP KCS10B Turning Insert

Product Description

The KENNAMETAL 6686923 is a solid carbide turning insert designated CPMT3251MP in the CPMT series, coated with AlTiN via a PVD process and graded KCS10B. It features a diamond (rhombic) 80-degree insert shape, a positive rake angle of 12 degrees, and an 11-degree relief angle. The inscribed circle measures 0.375 inches with an insert length of 0.3808 inches and a thickness of 0.1563 inches. The MP chip breaker geometry supports roughing and medium machining operations. Licensed machinists and CNC turning specialists install this insert in screw-on toolholders for lathe and boring applications.

This insert is suited for turning, facing, and boring operations on stainless steel, superalloys, titanium, steel, cast iron, and aluminum. The KCS10B grade delivers high wear resistance to moderate wear resistance and toughness across P, M, K, N, S, and H workpiece material codes. It is intended for production environments where consistent tool life across varied material families is required. The 0.0156-inch corner radius and honed cutting edge style support controlled surface finishes in both interrupted and continuous cut scenarios.

Key Features

• AlTiN PVD coating on solid carbide substrate for thermal resistance and wear performance
• Diamond 80-degree insert shape with positive rake and positive side clearance for reduced cutting forces
• MP chip breaker geometry rated for roughing and medium machining operations
• Two cutting edges per insert with neutral hand orientation for flexible toolholder use
• Compatible with screw-on insert holding method for secure, repeatable clamping
• Conforms to ANSI insert code CPMT3251 and ISO insert code CPMT09T304

Compatibility

Designed as an OEM-style replacement or direct-fit insert for screw-on CPMT-style toolholders accepting ANSI size code 3251 or ISO size code 09T304. Multi-use application covers turning, facing, and boring operations per manufacturer specifications.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Power down and lock out the machine spindle before changing inserts. Use the appropriate Torx or hex key to seat the clamping screw to the toolholder manufacturer's specification without overtightening. Inspect the insert pocket and clamping screw for wear or debris before seating a new insert.