Description

The SECO 02430120 is a solid carbide turning insert in the DCMT 21.51-F1 series, designed for precision metal cutting in CNC lathe and turning center applications. Coated with a multilayer PVD TiAlN and TiN finish, this insert carries the CP200 manufacturer grade and features an F1 chip breaker geometry with a sharp cutting edge style. It has a 55-degree diamond shape, a 0.25-inch inscribed circle, and a 1/64-inch (0.0157-inch) corner radius. Machinists and CNC operators install this insert when working stainless steel, superalloys, and titanium in finish to semi-finish passes.

This insert is suited for turning, facing, boring, and back turning operations on CNC lathes and multi-axis turning centers. Primary workpiece materials are stainless steel, superalloys, and titanium (ISO material codes M and S). Secondary applications include steel and cast iron (ISO codes P and K). The neutral hand orientation makes it compatible with standard DCMT-style toolholders. The screw-clamp holding method provides secure seating at elevated cutting speeds typical of ISO M and S material grades.

Key Features

Solid carbide substrate with multilayer PVD TiAlN and TiN coating for heat and wear resistance in difficult-to-machine alloys
55-degree diamond insert shape (Shape Code D) with F1 chip breaker for controlled chip formation in finish and semi-finish cuts
Sharp cutting edge style with positive rake geometry reduces cutting forces on thin-wall and heat-sensitive workpieces
Two cutting edges per insert; neutral hand orientation fits standard DCMT screw-clamp toolholders
Maximum depth of cut of 0.2913 inches supports a range of roughing-to-finish pass depths
Conforms to ANSI and ISO standards; ISO code DCMT070204-F1, Industry Standard Number DCMT21.51-F1

Compatibility

Designed as a screw-clamp replacement insert for DCMT-style toolholders accepting a 55-degree diamond insert with a 0.25-inch inscribed circle and 3/32-inch thickness. Verify toolholder pocket specifications against ANSI and ISO DCMT070204 geometry before installation.

Installation Notes

Installation is performed by qualified machinists or CNC tooling technicians. Before indexing or replacing the insert, confirm the machine spindle is stopped and the turret is in a safe position. Use the appropriate torx or hex key to the toolholder manufacturer’s specified seating torque for DCMT screw-clamp seats. Inspect the insert pocket and clamp screw for wear or debris before seating the new insert to ensure proper contact and repeatability.

Technical Specifications

Insert Style: DCMT
Series: DCMT-F1
Manufacturer Grade: CP200
Insert Shape: Diamond 55
Included Angle: 55 degrees
Insert Material: Solid Carbide
Coating: TiAlN and TiN (Multilayer PVD)
Chip Breaker: F1
Cutting Edge Style: Sharp
Rake: Positive
Insert Hand: Neutral
Inscribed Circle: 0.25 inches (1/4 inch)
Corner Radius: 0.0157 inches (1/64 inch)
Insert Thickness: 0.0937 inches (3/32 inch)
Insert Length: 0.6142 inches
Hole Diameter: 0.1142 inches
Maximum Depth of Cut: 0.2913 inches
Relief Angle: 7 degrees
Number of Cutting Edges: 2
Insert Holding Method: Screw
Primary Workpiece Material: Stainless Steel, Superalloys and Titanium (ISO M, S)
Secondary Workpiece Material: Steel, Cast Iron (ISO P, K)
Material Grade: M01, M10, M20, S10, S20
Applications: Back Turning, Boring, Facing, Turning
Standards: ANSI, ISO
ISO Code: DCMT070204-F1
Industry Standard Number: DCMT21.51-F1
Weight: 0.2 pounds
Package Quantity: 1