Kennametal 6525691 Milling Insert KCPM40 Solid Carbide

Product Description

The KENNAMETAL 6525691 is a solid carbide milling insert in the LNGQ series, engineered for high-performance metal removal in demanding machining applications. Manufactured to ANSI and ISO standards under catalog number LNGQ120604ERGEKT4, this insert features a TiAlN and AlCrN PVD coating applied via physical vapor deposition for improved wear resistance and heat stability. The rectangular insert profile measures 0.5316 inches wide and 0.25 inches thick, with a 1/64-inch corner radius and four usable cutting edges on a single-sided, right-hand configuration. A positive rake geometry and honed cutting edge style reduce cutting forces on the workpiece. Licensed machinists and CNC tooling technicians are the primary installers of this insert.

This insert is designed for milling steel, stainless steel, superalloys, and titanium workpieces, making it appropriate for aerospace, energy, and general precision machining operations. It is compatible with the Mill 4-12 cutter series and is held in place via screw-on mounting. The LNGQ insert style and size code 120604 are suited for moderate to high cutting speeds where PVD-coated carbide grades outperform uncoated or CVD alternatives. The GE chip breaker geometry supports chip control across a range of feed rates typical in roughing and semi-finishing passes on difficult-to-machine alloys.

Key Features

• Solid carbide construction with TiAlN and AlCrN PVD dual coating for thermal and abrasion resistance
• Four cutting edges per insert on a single-sided, right-hand body for extended tool life per unit
• Positive rake and honed edge preparation reduce cutting forces on stainless steel and superalloys
• GE chip breaker geometry promotes reliable chip evacuation in continuous and interrupted cuts
• Meets ANSI and ISO standards; ANSI/ISO code LNGQ120604ERGEKT4
• Compatible with the Mill 4-12 cutter series; screw-on insert holding method for secure seating

Compatibility

Designed for use with the Kennametal Mill 4-12 cutter series. Insert size code 120604, LNGQ insert style, ANSI and ISO designation LNGQ120604ERGEKT4. Primary workpiece material codes P (Steel), M (Stainless Steel), and S (Superalloys and Titanium).

Installation Notes

Installation is performed by a qualified CNC machinist or tooling technician. Before changing inserts, ensure the machine spindle is fully stopped and locked out per your facility lockout/tagout procedure. Seat the insert flush against the pocket walls before tightening the clamping screw to prevent micro-movement during cutting. Inspect the insert pocket for chips or debris before seating a new insert, as contamination can cause premature edge failure or dimensional deviation.