DNMG442 CA025P Grade CVD Carbide, Indexable Turning Insert For Boring, Copying, External Turning

Product Overview

This insert is part of Kyocera's ISO ISOI series, style DNMG, size 442, and is manufactured to exacting tolerances for professional CNC turning applications.

ISO Designation Breakdown

The DNMG150608 designation is structured according to ISO 1832 standards, providing a complete technical fingerprint of the insert:

Engineering Dimensions & Geometry

The DNMG150608 features precision-ground geometry optimized for boring, copying, external turning. Key dimensional specifications include:

• Shape: 55 Degree Diamond with 55° included angle
• Inscribed Circle (IC): 1/2" — determines holder pocket size and tool reach
• Thickness (S): 1/4" — provides insert rigidity and heat capacity
• Nose Radius (r): 1/32" — influences surface finish and edge strength
• Hand: Neutral — compatible with corresponding toolholder orientation
• Cutting Edges: Multiple usable edges per insert for cost efficiency

The geometric tolerances meet ISO 1832 Class H standards, ensuring interchangeability across qualified toolholders and consistent cutting edge positioning.

Grade Details — Key Grade Characteristics

The CA025P grade is a CVD-coated carbide grade specifically developed for steel machining applications. It features a thickened alumina layer with twice the thermal resistance of conventional coatings, combined with a specialized post-coating treatment that prevents material adhesion and built-up edge formation.

Key performance characteristics of grade CA025P:

• Substrate: Fine-grained carbide with high cobalt content for toughness
• Coating Architecture: Multi-layer CVD with TiN/TiCN/Al₂O₃ layers
• Hardness: Optimized balance between hardness and fracture resistance
• Thermal Resistance: Superior oxidation resistance up to 900°C cutting temperatures
• Application Range: General to interrupted machining of carbon steel, alloy steel, and cast steel
• Post-Coating Treatment: Specialized surface finish to reduce built-up edge and adhesion

Grade Comparison Matrix

Note: Grade CA025P is positioned as a versatile, high-reliability grade for general steel machining with excellent interruption tolerance due to its thickened alumina coating and specialized post-treatment.

Chipbreaker Profile

chipbreaker geometry delivers consistent chip formation for boring, copying, external turning. The optimized profile balances cutting force reduction with edge integrity for extended tool life.

Technical characteristics of the chipbreaker:

• Chipbreaker Code:
• Intended Application: Boring, Copying, External Turning
• Chip Control Range: Optimized for standard feed rates in steel
• Surface Finish Capability: Good to excellent depending on feed and speed selection
• Edge Strength: Balanced for reliability in continuous and light interrupted cuts

Recommended Applications & Workpiece Materials

The DNMG150608 with grade CA025P is specifically recommended for the following applications and materials:

• Primary Operations: Boring, Copying, External Turning
• Workpiece Materials: Carbon steel (C45, C50), alloy steel (4140, 4340), tool steel, cast steel, and general structural steels
• Material Hardness Range: Up to 350 HB (ideal range 150–280 HB)
• Operation Type: Continuous cutting, light interrupted cutting, and high-speed finishing
• Industry Sectors: Automotive, aerospace, general engineering, energy, and metal fabrication

Application Map by Operation

Recommended Cutting Conditions

Recommended cutting parameters for the DNMG150608 in steel machining:

• Cutting Speed (Vc): 150–280 m/min for continuous cutting; 120–200 m/min for interrupted cutting
• Feed Rate (f): 0.15–0.40 mm/rev depending on chipbreaker geometry and depth of cut
• Depth of Cut (ap): 0.5–4.0 mm for general applications; up to 6.0 mm for heavy roughing
• Coolant: Wet cutting recommended for optimal tool life and surface finish; high-pressure coolant enhances chip evacuation

Operating Guidelines

Best practices for DNMG150608 operation:

• Mount insert with correct orientation using appropriate clamping torque
• Minimize tool overhang to enhance dynamic stability
• Select feed rate that produces continuous chip breaking without excessive force
• Inspect cutting edge before each shift for micro-chipping or coating wear
• Use appropriate toolholder for neutral hand of cut
• Apply consistent coolant delivery to maximize coating life

Toolholder Compatibility

Compatible toolholder systems for DNMG150608:

• External turning holders: DNMG series with 55° approach angle
• Boring bars: Minimum 1/2" IC capacity with neutral orientation
• Facing holders: Standard DNMG pocket for 55 degree diamond profile
• Specialty holders: Copy and profile turning holders accepting 442 size inserts

Ensure holder rigidity class matches application demands. For heavy roughing, select reinforced holders with enhanced clamping systems.

Packaging & Ordering Information

The DNMG150608 is supplied in Kyocera's original industrial packaging, with each insert protected in a precision-formed plastic tray. Standard order quantity is 10 pieces per pack. OEM and bulk packaging options are available for institutional buyers. Every shipment includes material and dimensional conformance documentation.

Minimum Order Quantity: 1 pack (10 inserts)
MPN: TMH00197
ISO Designation: DNMG150608
ANSI Code: DNMG442CA025P

Catalog Meta Data

Product Classification: ISO Series ISOI | Style DNMG | Size 442 | Grade CA025P | Coating CVD

Identifiers: ISO DNMG150608 | ANSI DNMG442CA025P | Manufacturer Part Number TMH00197

Availability: Standard stock item with immediate dispatch capability.