Kyocera SDMT09T204C KW10 TWE00797 Milling Insert - Milling

Product Overview

The Kyocera SDMT09T204C KW10 Grade Uncoated Carbide Indexable Milling Insert is a precision-engineered cutting tool manufactured by Kyocera in Japan. provides stable cutting action with minimal burr formation, making it ideal for CNC milling centers performing back chamfering, chamfering, countersinking, v-shape slotting operations. The SDMT09T204C features a 90 Degree Square geometry with 4 usable cutting edges, engineered to deliver versatile machining capability across multiple milling applications. ensures repeatable results across batch operations.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details - Key Grade Characteristics

KW10 is a premium uncoated fine-grain tungsten carbide grade engineered by Kyocera for general-purpose milling and multi-operation machining. The micro-grain structure (sub-micron particle size) provides an optimal balance of hardness and toughness, delivering a sharp, stable cutting edge that withstands the intermittent cutting forces characteristic of milling operations.

• Substrate: Ultra-fine WC-Co carbide (ISO K10 equivalent classification)
• Hardness: ~91.5 HRA, providing excellent wear resistance at moderate speeds
• Coating: Uncoated (bare substrate) to preserve edge sharpness for fine finishing
• Edge Preparation: Precision-honed T-land for burr-free surface formation
• Thermal Stability: Stable performance up to 400°C without oxidation degradation
• Primary Advantage: Superior edge stability under intermittent cutting loads

Grade Comparison Matrix

Chipbreaker Profile

The SDMT09T204C features a low cutting force profile geometry optimized for back chamfering, chamfering, countersinking, v-shape slotting. The low cutting force profile directs chips away from the workpiece surface, preventing chip recutting and protecting finished surfaces under high-speed milling conditions.

• Chipbreaker Type: C (Low Cutting Force Profile)
• Rake Angle: Positive for reduced cutting forces in milling
• Flank Relief: Standard 11° clearance for milling cutter bodies
• Chip Flow: Controlled curl and evacuation from cutting zone
• Edge Condition: Micro-honed for balance of sharpness and edge strength

Recommended Applications & Workpiece Materials

The KW10 substrate and uncoated edge make the SDMT09T204C particularly effective on materials where edge sharpness and impact resistance are critical. Recommended workpiece materials include:

• Carbon & Alloy Steels (up to 35 HRC) — Excellent surface finish and predictable tool life
• Stainless Steels (304, 316, 430 series) — Reduced work-hardening tendency due to sharp edge
• Cast Iron (Gray, Ductile) — Stable cutting with excellent wear resistance
• Non-Ferrous Metals (Aluminum, Brass, Copper) — Mirror finish achievable without built-up edge
• Titanium Alloys (Ti-6Al-4V) — Suitable for low-speed precision milling with adequate coolant

Application Map by Operation

Recommended Cutting Conditions

Note: Values are starting recommendations for milling. Optimize based on cutter body rigidity, coolant delivery, and workpiece setup. Reduce speeds by 20% for chamfering and countersinking operations.

Operating Guidelines

• Cutter Body Selection: Use SDMT-compatible milling cutter bodies with precise pocket tolerances (±0.01 mm) to maintain cutting edge runout below 0.02 mm.
• Insert Seating: Ensure the insert sits fully in the pocket without debris. Torque clamping screw to 2.5–3.5 N·m; do not overtighten.
• Coolant Recommendation: Flood coolant or through-spindle coolant (TSC) is strongly recommended for steel and stainless steel to prevent chip recutting. For cast iron and aluminum, dry machining or MQL is acceptable.
• Depth of Cut Strategy: For facing, use 0.5–1.0× insert IC for optimal chip formation. For chamfering, reduce axial depth to match chamfer width.
• Indexing: When flank wear exceeds 0.10 mm or surface finish degrades, index to a fresh cutting edge. Discard insert when all edges are exhausted.
• Cutter Runout: Maintain cutter body runout below 0.02 mm TIR to prevent uneven tool wear and chatter marks.

Toolholder Compatibility

The SDMT09T204C is designed to seat in standard SDMT series milling cutter bodies. Compatible cutter families include:

• Kyocera SDMT-F Face Milling Cutters (matching IC size)
• Kyocera SDMT-C Chamfer Milling Cutters (45° and 60° chamfer angles)
• ISO 1832 Type S (Square Milling) compliant pockets
• Clamp systems: Screw-lock or wedge-lock for secure retention under centrifugal loads

Verify cutter pocket geometry (IC, thickness, and seat angle) matches insert specifications before mounting. Incompatible cutters may cause vibration, poor surface finish, and insert ejection at high speeds.

Packaging & Ordering Information

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