Kyocera SNMG120408GC CA320 TME05170

Product Overview

The Kyocera SNMG120408GC CA320 TME05170 is a premium square insert engineered for medium duty turning operations in modern CNC turning centers. Manufactured to exacting Japanese industrial standards, this insert combines a high-performance CVD Coated Carbide substrate with an advanced multi-layer CVD coating to deliver exceptional wear resistance, thermal stability, and extended tool life.

Designed specifically for carbon steel, alloy steel, stainless steel, the SNMG120408GC offers medium capability with optimized chip control and surface finish quality. The square geometry provides 4 usable cutting edges, maximizing cost-per-edge efficiency in high-volume production environments.

ISO Designation Breakdown

The SNMG120408GC designation follows ISO 1832 standard nomenclature for indexable inserts:

Engineering Dimensions & Geometry

Grade Details - Key Grade Characteristics

CA320 is a high-performance CVD Coated Carbide grade specifically developed for steel machining applications in the P15-P35 range. Key characteristics include:

• Multi-Layer CVD Coating: TiCN base layer + Al₂O₃ intermediate layer + TiN top layer provides exceptional abrasion resistance and thermal barrier properties.
• Optimized Substrate: Medium-coarse WC-Co grain structure balances hardness (HV 1,550) with fracture toughness (12.5 MPa·m½).
• Edge Treatment: Precision-honed T-land edge preparation minimizes chipping and micro-fractures during interrupted cuts.
• Thermal Stability: Operates effectively at cutting temperatures up to 900°C without significant coating degradation.
• Balanced performance for general machining

Grade Comparison Matrix

Chipbreaker Profile

GC-Type (Medium Machining)

GC-type chipbreaker: wider land for medium depths, excellent chip curling and breakage

Recommended Applications & Workpiece Materials

The SNMG120408GC CA320 is optimized for the following material groups:

• Carbon Steels: C35, C45, C50, C60 (ISO P.1-P.3) — Excellent chip control and surface finish.
• Alloy Steels: 42CrMo4, 34CrNiMo6, 16MnCr5 (ISO P.4-P.5) — Balanced wear and fracture resistance.
• Stainless Steels: 304, 316, 410 (ISO M.1-M.2) — Moderate suitability; reduced speeds recommended.
• Cast Steels: GS-52, GS-60 — Good performance with adequate coolant supply.
• Forged Steels: Scale-covered surfaces — Edge strength accommodates variable depths.

Application Map by Operation

Recommended Cutting Conditions

The following parameters are recommended for carbon steel, alloy steel, stainless steel using the SNMG120408GC CA320:

Note: Values are starting recommendations. Optimize based on machine rigidity, workpiece condition, and coolant concentration. For stainless steel, reduce cutting speed by 20-30%.

Operating Guidelines

• Tool Overhang: Minimize overhang to prevent vibration. Use minimum 4× shank diameter engagement for stable cutting.
• Coolant Supply: High-pressure coolant (10-20 bar) directed at the cutting edge improves chip evacuation and extends tool life by 30-50%.
• Entry Angle: Maintain 45-75° entry angle for square inserts to avoid notch wear and ensure uniform load distribution.
• Edge Inspection: Inspect inserts after 30-60 minutes of cutting for flank wear (VBmax = 0.3 mm) or crater wear (KT = 0.1 mm).
• Index Frequency: Rotate or index inserts at consistent intervals to maintain dimensional accuracy and prevent catastrophic failure.
• Storage: Store inserts in original packaging at 15-25°C with humidity below 60% to prevent coating oxidation.

Toolholder Compatibility

The SNMG120408GC is compatible with standard square insert toolholders following ISO 5610 standards:

• Recommended Holders: SSDCN, SSDGN, CSSNR type toolholders
• Clamp System: Lever-lock or screw-clamp mechanisms with through-coolant capability.
• Shank Sizes: 20×20 mm, 25×25 mm, 32×32 mm (select based on IC and application stability).
• Approach Angle: 45°, 75°, or 90° depending on holder selection and workpiece geometry.
• Coolant Channels: Internal coolant delivery through the toolholder is highly recommended for chip evacuation.

Packaging & Ordering Information

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