Seco 02755038 Dcmt 21.51MF2 CP500 Carbide Turning Insert

Product Description

The SECO 02755038 is a solid carbide indexable turning insert in the DCMT series, designed for precision finishing operations on CNC lathes and turning centers. This insert carries the DCMT 21.51MF2 geometry with a CP500 manufacturer grade and a multilayer PVD-applied TiAlN plus TiN coating. The 55-degree diamond (rhombic) shape provides a sharp, positive rake cutting edge with a 7-degree relief angle. With a 0.0157-inch corner radius and a maximum depth of cut of 0.2913 inches, this insert is engineered for light, accurate finishing cuts where tight tolerances and surface finish are the priority. It is held in the toolholder via a through-hole screw clamp method and delivers two usable cutting edges per insert.

This insert is suited for finishing passes on stainless steel, steel, cast iron, superalloys, and titanium. The MF2 chip breaker geometry is optimized for finishing applications, producing controlled chip flow at lower feeds and depths of cut typical in precision turning work. Applicable operations include turning, facing, boring, and back turning. The CP500 grade with PVD coating provides moderate-to-high wear resistance paired with sufficient toughness for interrupted or variable-surface cuts across P, K, and S workpiece material classifications. Machinists and CNC operators in production and job shop environments will find this insert appropriate for tight-tolerance final passes on a range of ferrous and high-temperature alloy materials.

Key Features

• DCMT 21.51MF2 geometry with 55-degree diamond insert shape and positive rake for clean finishing cuts
• CP500 grade with multilayer PVD TiAlN plus TiN coating for wear resistance on steel, cast iron, and superalloys
• MF2 chip breaker designed specifically for finishing operations with controlled chip evacuation
• Two cutting edges per insert, screw-clamp holding method, neutral hand orientation
• 0.0157-inch corner radius and 0.2913-inch maximum depth of cut support precision, light-pass machining
• Conforms to both ANSI (DCMT21.51) and ISO (DCMT070204) standards for broad toolholder compatibility

Compatibility

Designed as a standard ANSI- and ISO-compliant DCMT-style indexable insert for screw-clamp turning toolholders accepting a 55-degree diamond insert with a 0.1142-inch hole diameter. Compatible toolholders must match the DCMT insert seat geometry. No specific toolholder model numbers were provided in the product data.

Installation Notes

Installation is performed by a qualified machinist or CNC tooling technician. Ensure the machine spindle is stopped and the turret is in a safe, indexed position before changing inserts. Seat the insert firmly against the toolholder pocket locating surfaces before torquing the clamp screw; an improperly seated insert will affect dimensional accuracy and can cause premature edge failure. Do not exceed the insert's rated maximum depth of cut, and verify that the toolholder grade and overhang are appropriate for the intended operation before running the first pass.