Description

The SECO 02543697 is a solid carbide turning insert in the DNMU-MF1 series, designed for precision metal cutting in CNC turning applications. The insert carries the CP500 manufacturer grade and features a multilayer PVD coating of TiAlN and TiN, which provides thermal resistance and wear protection during interrupted and continuous cuts. The 55-degree diamond shape (Insert Shape Code D) and MF1 chip breaker geometry are optimized for finishing and medium turning. With a 3/8-inch inscribed circle, a 1/64-inch corner radius, and four usable cutting edges, this insert delivers consistent performance on demanding workpiece materials.

This insert is primarily rated for stainless steel (ISO Material Code M) and is also suitable for steel, cast iron, super-alloys, and titanium. It supports back turning, boring, facing, and turning operations, making it a versatile choice for production turning on lathes equipped with clamp, pin, or lever-lock toolholders. The negative rake and neutral hand orientation suit standard DNMU-style pockets. Typical users include CNC machinists and toolroom professionals working in aerospace, energy, and general machining environments.

Key Features

CP500 grade with multilayer PVD TiAlN and TiN coating for extended tool life on stainless and steel
55-degree diamond insert shape with MF1 chip breaker geometry for finishing and medium cuts
Four usable cutting edges per insert to reduce per-edge tooling cost
Compatible with clamp, pin, and lever-lock holding methods for flexible toolholder use
Honed cutting edge style for consistent, controlled entry on ISO M, P, K, and S workpiece materials
Negative rake, neutral hand fits standard DNMU-style insert pockets

Compatibility

Designed to seat in DNMU-style toolholders accepting a 55-degree diamond insert with a 3/8-inch inscribed circle, 3/16-inch thickness, and 0.150-inch hole diameter. ISO code DNMU110404-MF1. Industry standard number DNMU331-MF1. Meets ANSI and ISO insert standards. Minimum order quantity is 10 inserts; package quantity is 1.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Ensure the machine spindle is fully stopped and the turret is indexed to a safe position before seating or removing inserts. Use the appropriate torque wrench and clamping hardware specified by the toolholder manufacturer do not over-tighten the clamping screw, as this can chip the insert or damage the pocket. Inspect the insert pocket for chips or debris before seating a new insert to ensure proper seating and edge engagement.

Technical Specifications

Insert Style: DNMU
Series: DNMU-MF1
Manufacturer Grade: CP500
Insert Material: Solid Carbide
Coating: TiAlN and TiN (Multilayer PVD)
Insert Shape: Diamond 55 (Shape Code D)
Included Angle: 55 degrees
Inscribed Circle: 3/8 inch (0.3750 inches)
Corner Radius: 1/64 inch (0.0157 inches)
Insert Thickness: 3/16 inch (0.1874 inches)
Insert Length: 0.9134 inches
Hole Diameter: 0.1500 inches
Maximum Depth of Cut: 0.4409 inches
Number of Cutting Edges: 4
Chip Breaker: MF1
Cutting Edge Style: Honed
Rake: Negative
Insert Hand: Neutral
Relief Angle: 0 degrees
Tolerance Code: M
Clearance Code: N
Insert Holding Method: Clamp, Pin, Lever Lock
Primary Workpiece Material: Stainless Steel (ISO Code M)
Secondary Workpiece Materials: Steel, Cast Iron, Super-alloys and Titanium (ISO Codes P, K, S)
Material Grade: M10, M20, M30
Multi-Use Application: Back Turning, Boring, Facing, Turning
ISO Code: DNMU110404-MF1
Industry Standard Number: DNMU331-MF1
Standards: ANSI, ISO
UNSPSC Code: 23242105
Weight: 0.04 pounds