Kyocera GVFL340A KW10 Grade Uncoated Carbide Indexable Grooving Insert

Product Overview

The Kyocera GVFL340A KW10 Grade Uncoated Carbide Indexable Grooving Insert is a precision-engineered cutting tool manufactured by Kyocera in Japan. delivers exceptional surface finish and dimensional accuracy, making it ideal for CNC turning centers performing external and internal grooving operations. The GVFL340A features a 3.4 mm cutter width with left-hand orientation, engineered to produce accurate groove profiles with minimal flank wear. reduces tool change frequency and inventory overhead.

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 high-precision grooving and parting-off applications. The micro-grain structure (sub-micron particle size) provides an optimal balance of hardness and toughness, delivering a sharp, stable cutting edge that maintains groove accuracy over extended machining cycles.

• 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 grooving
• Edge Preparation: Precision-honed T-land for burr-free groove formation
• Thermal Stability: Stable performance up to 400°C without oxidation degradation
• Primary Advantage: Mirror-finish surface quality on groove walls and floors

Grade Comparison Matrix

Chipbreaker Profile

The GVFL340A utilizes a A chipbreaker geometry optimized for standard groove profile. The rake face is engineered to direct chips away from the groove walls, preventing chip recutting and protecting finished groove surfaces. This profile ensures controlled chip formation even at low feed rates common in precision grooving operations.

• Chipbreaker Type: A (Standard Groove Profile)
• Rake Angle: Neutral to slightly positive for steel and cast iron
• Flank Relief: Optimized for groove wall accuracy
• Chip Flow: Radial outward evacuation via controlled curl
• Edge Condition: Micro-honed to prevent burr formation on groove edges

Recommended Applications & Workpiece Materials

The KW10 substrate and uncoated edge make the GVFL340A particularly effective on materials where edge sharpness directly correlates with surface finish quality. Recommended workpiece materials include:

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

Application Map by Operation

Recommended Cutting Conditions

Note: Values are starting recommendations. Optimize based on machine rigidity, coolant delivery, and workpiece setup. Reduce speeds by 20% for internal grooving applications.

Operating Guidelines

• Toolholder Selection: Use SEEN-compatible external or internal grooving holders with precise pocket tolerances (±0.01 mm) to maintain groove width accuracy.
• Insert Seating: Ensure the insert sits fully in the pocket without debris. Torque clamping screw to 2.5–3.0 N·m; do not overtighten.
• Coolant Recommendation: Flood coolant with 5–8% soluble oil emulsion is recommended for steel and stainless steel. For cast iron and aluminum, dry machining or minimum quantity lubrication (MQL) is acceptable.
• Depth of Cut Strategy: Use multiple passes for deep grooves; do not exceed 1.5× insert width per pass to prevent breakage.
• Indexing: When edge degradation is detected (visible flank wear >0.05 mm or groove wall burrs), index to the second cutting edge. Discard insert if both edges are exhausted.
• Workpiece Runout: Maintain workpiece runout below 0.02 mm to prevent uneven groove widths and premature insert breakage.

Toolholder Compatibility

The GVFL340A is designed to seat in standard SEEN series grooving toolholders. Compatible holder families include:

• Kyocera SEEN-E External Grooving Holders (matching width)
• Kyocera SEEN-I Internal Grooving Holders (minimum bore Ø20 mm)
• ISO 1832 Type G (Rectangular Grooving) compliant pockets
• Clamp systems: Lever-lock or top-screw clamp depending on holder series

Verify holder pocket geometry (width, thickness, and seat angle) matches insert specifications before mounting. Incompatible holders may cause vibration, poor groove accuracy, and insert fracture.

Packaging & Ordering Information

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