Kyocera 2,98 TA SGM07718 DRILL - CNC

Product Overview

The Kyocera 2,98 TA SGM07718 is a premium two-flute solid carbide micro-drill engineered for high-precision CNC machining operations. Featuring an ultra-fine grain carbide substrate with advanced PVD coating technology, this 2.98 mm diameter drill delivers exceptional hole quality, superior chip evacuation, and extended tool life across a broad spectrum of workpiece materials. Designed for aerospace, automotive, medical, and general precision engineering applications, the 2,98 TA ensures reliable performance in through-hole and blind-hole drilling operations.

ISO Designation Breakdown

Full ISO reference: D2.98–2FL–TA–SGM07718

Engineering Dimensions & Geometry

Grade Details – Key Grade Characteristics

The TA Grade utilized in the 2,98 series represents Kyocera’s advanced micro-grain carbide technology, specifically developed for high-speed drilling in ferrous and non-ferrous materials.

• Substrate: Ultra-fine tungsten carbide (0.5 μm grain size) with 12% cobalt binder for exceptional toughness and wear resistance.
• Coating: Multi-layer TiAlN PVD coating (≈3.0 μm thickness) provides outstanding thermal stability up to 900°C and superior oxidation resistance.
• Hardness: 92.0 HRA (1,600 HV) ensuring maintained edge integrity at elevated cutting speeds.
• Transverse Rupture Strength: >3,800 MPa, minimizing chipping risk in interrupted cuts and cross-hole applications.
• Surface Finish: Mirror-polished flute surfaces (Ra < 0.2 μm) reduce friction and improve chip flow.

Grade Comparison Matrix

Chipbreaker Profile

The 2,98 TA features an optimized two-flute geometry with a specialized chipbreaker profile designed for micro-drilling applications:

• Flute Form: Parabolic flute design with increased core thickness (70% of Dc) for enhanced rigidity and reduced deflection.
• Chipbreaker Geometry: Precision-ground rake face with a 12° positive rake angle and 8° clearance angle promotes efficient chip curling and evacuation.
• Margin Design: Narrow land margins (0.08 mm) minimize friction while maintaining hole straightness and dimensional accuracy.
• Web Thinning: Advanced web-thinning geometry reduces thrust forces by up to 25%, enabling stable drilling at lower feed rates.

Recommended Applications & Workpiece Materials

Application Map by Operation

Recommended Cutting Conditions

Values below are starting recommendations. Optimize based on machine rigidity, coolant delivery, and workpiece fixturing.

Operating Guidelines

• Peck Drilling: For holes deeper than 3×Dc, employ a peck cycle with 1×Dc peck depth and full retract to break chips and clear flutes.
• Coolant Strategy: High-pressure through-spindle coolant (minimum 70 bar) is strongly recommended for holes exceeding 5×Dc to prevent chip packing and thermal damage.
• Runout Tolerance: Maintain total indicated runout (TIR) below 0.01 mm at the tool tip to prevent uneven wear and premature failure.
• Entry Angle: When drilling inclined surfaces, use a spot drill or chamfer to create a 90° entry; avoid direct entry on slopes >5°.
• Feed Rate: Reduce feed by 30% during the first 1 mm of engagement to stabilize the drill before reaching full cutting parameters.

Toolholder Compatibility

Packaging & Ordering Information

• Packaging: Each drill is supplied in an individual plastic protective tube with shock-absorbing foam insert to prevent edge damage during transit.
• Minimum Order Quantity: 1 piece (no minimum order restrictions).
• Lead Time: Standard catalog items typically ship within 1–2 business days.
• Storage Recommendation: Store in original packaging at 15–25°C with relative humidity below 60% to preserve coating integrity.
• Traceability: Every unit is laser-marked with the Kyocera logo, diameter, grade, and catalog number for full traceability.

Catalog Meta Data

Technical specifications are subject to change without notice. All values are nominal and should be verified against the latest Kyocera product catalog. For application-specific support, contact our technical team.