DNMX442WF 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 442, and is manufactured to exacting tolerances for professional CNC turning applications.

ISO Designation Breakdown

The DNMX150608WF designation is structured according to ISO 1832 standards, providing a complete technical fingerprint of the insert:

Engineering Dimensions & Geometry

The DNMX150608WF 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

Grade CA025P is engineered for general to interrupted machining of steel. The CVD coating architecture includes an optimized alumina layer that delivers exceptional thermal resistance and a specialized surface treatment that minimizes chip adhesion, extending tool life significantly.

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 DNMX150608WF 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

Best practices for DNMX150608WF 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

The DNMX150608WF is compatible with standard ISO toolholders designed for 55 degree diamond inserts with neutral hand orientation. Recommended holder styles include:

• DNMX-type turning holders for external turning and facing
• Boring bars with 1/2" inscribed circle capacity for internal machining
• Copy turning holders with appropriate insert pocket angle (55°)
• Toolholders with precision-ground pockets and adequate clamping force

Verify holder pocket dimensions match insert thickness (1/4") and inscribed circle (1/2") for secure seating.

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: TMH00153
ISO Designation: DNMX150608WF
ANSI Code: DNMX442WFCA025P

Catalog Meta Data

Technical Index: Series: ISOI | Style: DNMX | Size Code: 442 | Grade Code: CA025P | Coating Type: CVD | Chipbreaker Code: WF

Reference Numbers: ISO Designation DNMX150608WF | ANSI Code DNMX442WFCA025P | MPN TMH00153

Supply Status: Active catalog item with consistent manufacturing availability.