Kyocera TKR2-P KW10 TWE15061 Cut-Off Insert - Cut-Off

Product Overview

The Kyocera TKR2-P KW10 Grade Uncoated Carbide Indexable Cut-Off 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 parting-off, grooving, and cutoff operations. The TKR2-P features a 2.0 mm cutter width with right-hand (R) configuration with an 8° lead angle, providing optimal chip evacuation when approaching from the right and reducing burr formation on the cutoff face, engineered to minimize material waste and deliver clean, square cutoff faces. 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 developed by Kyocera specifically for cut-off, grooving, and precision finishing applications. The sub-micron grain structure provides exceptional hardness while retaining sufficient toughness to resist micro-chipping during interrupted cuts.

• Substrate: Ultra-fine WC-Co carbide (ISO K10 classification)
• Hardness: ~91.5 HRA, delivering superior wear resistance in abrasive cast iron
• Coating: Uncoated (bare substrate) to maintain the sharpest possible edge for clean cutoff
• Edge Preparation: Light hone (T-land) to prevent edge micro-fracture on entry
• Thermal Conductivity: High thermal conductivity dissipates heat efficiently during narrow-groove cutting
• Primary Advantage: Minimal burr formation and reduced secondary finishing on cutoff faces

Grade Comparison Matrix

Chipbreaker Profile

The P-profile chipbreaker is engineered for low-feed cut-off operations, creating tightly curled chips that evacuate cleanly from the narrow groove. This profile minimizes chip packing and reduces the risk of insert fracture during deep grooving.

• Chipbreaker Type: P (Low-Feed Narrow Groove)
• Feed Range: 0.02 – 0.08 mm/rev
• Chip Form: 6C–9C (tightly curled, short arc)
• Groove Depth Limit: Up to 15 mm with stable chip flow

Recommended Applications & Workpiece Materials

The KW10 substrate and uncoated edge make the TKR2-P particularly effective on materials where heat dissipation and edge sharpness are critical. Recommended workpiece materials include:

• Gray & Ductile Cast Iron — Superior wear resistance and stable cutting action
• Aluminum Alloys (6061, 7075, A380) — Clean cutoff without built-up edge or burr
• Copper & Brass — Excellent surface finish on cutoff faces with minimal deformation
• Titanium Alloys (Ti-6Al-4V, Ti-3Al-2.5V) — Low-speed cutoff with adequate coolant to prevent ignition
• Plastics & Composites — Sharp edge prevents melting and delamination at cutoff
• Non-Metallic Materials (Graphite, Ceramic) — Abrasion-resistant edge maintains width accuracy

Application Map by Operation

Recommended Cutting Conditions

Note: Values are starting recommendations. Reduce cutting speed by 15–20% when approaching the center of the workpiece to prevent spindle load spikes. Always use adequate coolant for titanium and steel alloys.

Operating Guidelines

• Toolholder Selection: Use KTKC-compatible cut-off holders with maximum rigidity. Overhang should not exceed 1.5× holder width to prevent chatter and insert breakage.
• Insert Seating: Clean the holder pocket thoroughly before insert installation. Torque clamping screw to 2.0–2.5 N·m. Verify insert is fully seated and flush with holder face.
• Coolant Recommendation: High-pressure coolant (≥70 bar) directed at the cutting zone is strongly recommended for steel and titanium. For cast iron and aluminum, flood coolant or dry machining is acceptable.
• Center Approach: Reduce feed rate by 50% when the tool reaches within 2 mm of the spindle centerline to prevent "zero-speed" rubbing and insert fracture.
• Indexing: The TKR2-P has 1 cutting edge(s). When flank wear exceeds 0.10 mm or burr formation increases, rotate or replace the insert immediately.
• Workpiece Support: For bar cutoff operations, ensure the bar extends no more than 3× diameter from the chuck. Use steady rests for long shafts to minimize vibration.

Toolholder Compatibility

The TKR2-P is designed to seat in standard KTKC series cut-off toolholders. Compatible holder families include:

• Kyocera KTKC-R2 External Cut-Off Holders (matching width)
• Kyocera KTKC-IR2 Internal Grooving Bars (minimum bore Ø20 mm)
• ISO 1832 Type G (Rectangular Cut-Off) compliant pockets
• Clamp systems: Top-clamp or wedge-lock for secure insert retention under radial loads

Verify holder pocket width matches insert width exactly. A loose pocket causes insert movement and poor dimensional accuracy; an overly tight pocket risks insert cracking during clamping.

Packaging & Ordering Information

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