Seco 02825854 Dnmu Turning Insert TH1000 Carbide

Product Description

The SECO 02825854 is a solid carbide turning insert in the DNMU series, designed for high-performance metal cutting in demanding machining environments. Featuring a 55-degree diamond shape and a TiAlSiN multilayer PVD coating under the TH1000 manufacturer grade, this insert delivers thermal and wear resistance when cutting superalloys, titanium, and hard materials. It carries an inscribed circle of 0.375 inches, an insert thickness of 0.1874 inches, and a corner radius of 0.0157 inches. With 8 cutting edges and a chamfered and honed cutting edge style, it is suited for production turning operations where tool life and edge integrity are critical. Machinists and CNC operators in aerospace, energy, and precision manufacturing install this insert.

This insert is rated for primary workpiece materials classified as superalloys and titanium (material code S) and hard materials (material code H), corresponding to material grades S05 and H05. It supports multiple operations including turning, facing, boring, and back turning. The negative rake geometry and M3 chip breaker promote controlled chip flow during interrupted or continuous cuts on difficult-to-machine alloys. It is sold individually with a minimum order quantity of 10 units and conforms to both ANSI and ISO standards. The ISO code for this insert is DNMU110404-M3 and the industry standard number is DNMU331-M3.

Key Features

• 55-degree diamond insert shape (shape code D) with negative rake geometry for stable cutting in hard and exotic alloys
• TiAlSiN multilayer PVD coating (TH1000 grade) for thermal resistance and extended tool life
• 8 usable cutting edges per insert, maximizing cost-per-edge value
• M3 chip breaker geometry supports turning, facing, boring, and back turning operations
• Chamfered and honed cutting edge style reduces micro-chipping on entry and exit
• Compatible holding methods include clamp, pin, and lever lock toolholders

Compatibility

Designed for use in DNMU-series toolholders that accept a 331 insert size with clamp, pin, or lever lock holding methods. Conforms to ANSI and ISO standards (ISO code DNMU110404-M3, industry standard number DNMU331-M3). Primary workpiece materials are superalloys, titanium, and hard materials (material codes S and H).

Installation Notes

This insert is installed by a qualified machinist or CNC toolroom technician. Always power down and lock out the machine spindle before changing inserts. Seat the insert fully against the toolholder pocket and tighten the clamping mechanism to the toolholder manufacturer's specified procedure before resuming cuts. Inspect the cutting edge and pocket seating surface for chips or debris before each insert rotation or replacement.