DNMX431WF 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 DNMX, size 431, and is manufactured to exacting tolerances for professional CNC turning applications.

ISO Designation Breakdown

The ISO designation DNMX150404WF follows the international standard for indexable inserts, where each character conveys critical geometric and functional information:

Engineering Dimensions & Geometry

The DNMX150404WF 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): 3/16" — provides insert rigidity and heat capacity
• Nose Radius (r): 1/64" — 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

CA025P represents Kyocera's advanced CVD grade technology for steel machining. The substrate combines high hardness with excellent toughness, while the multi-layer CVD coating provides superior thermal insulation and chemical stability at elevated cutting temperatures.

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

WF wiper-edge chipbreaker combines chip control with surface finish optimization. The unique land geometry acts as a micro-burnishing edge, reducing feed marks and delivering exceptional surface quality in external turning and boring.

Technical characteristics of the WF chipbreaker:

• Chipbreaker Code: WF
• 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 DNMX150404WF 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

Optimal cutting parameters for grade CA025P in steel:

• Cutting Speed: 180–300 m/min for stable continuous cuts; reduce by 20% for interrupted conditions
• Feed Rate: 0.12–0.50 mm/rev — start at lower end and increase based on chip formation quality
• Depth of Cut: 0.3–5.0 mm; heavier cuts possible with rigid setup and stable workpiece
• Coolant Strategy: Flood coolant for general use; through-tool coolant for deep boring and improved chip control

Operating Guidelines

Operational recommendations:

• Secure workpiece firmly to prevent deflection during heavy cuts
• Align tool center height precisely with spindle axis
• Choose cutting speed based on workpiece hardness and stability
• Replace insert at first sign of flank wear or surface finish degradation
• Keep toolholder pockets clean and free of chip debris
• Use recommended torque when securing insert to prevent seat damage

Toolholder Compatibility

Compatible toolholder systems for DNMX150404WF:

• External turning holders: DNMX series with 55° approach angle
• Boring bars: Minimum 1/2" IC capacity with neutral orientation
• Facing holders: Standard DNMX pocket for 55 degree diamond profile
• Specialty holders: Copy and profile turning holders accepting 431 size inserts

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

Packaging & Ordering Information

Inserts are packaged in anti-static blister packs with 10 units per standard pack. Individual insert identification includes ISO designation, grade, and batch code for full traceability. Custom packaging and labeling available for contract manufacturing and MRO supply chains.

Minimum Order Quantity: 1 pack (10 inserts)
MPN: TMH00149
ISO Designation: DNMX150404WF
ANSI Code: DNMX431WFCA025P

Catalog Meta Data

Product Classification: ISO Series ISOI | Style DNMX | Size 431 | Grade CA025P | Coating CVD

Identifiers: ISO DNMX150404WF | ANSI DNMX431WFCA025P | Manufacturer Part Number TMH00149

Availability: Standard stock item with immediate dispatch capability.