Product Overview

The Kyocera 1.55mm 2FL TA Solid Carbide Drill (SGM08169) is a premium micro-drilling solution engineered for high-precision CNC machining operations. Featuring a 140° point angle and 30° helix design, this two-flute drill delivers exceptional hole accuracy, superior surface finish, and extended tool life in demanding production environments. Manufactured from ultra-fine grain carbide substrate with advanced TA-grade PVD coating, the SGM08169 is optimized for drilling depths up to 3×D with consistent chip evacuation and minimal burr formation.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details - Key Grade Characteristics

TA Grade is Kyocera's proprietary PVD-coated micro-grain carbide grade specifically developed for small-diameter solid carbide drills operating at elevated surface speeds.

• Substrate: Ultra-fine WC-Co grain structure (0.5 μm) with 10% Co binder for high hardness and toughness balance
• Coating: Multi-layer TiAlN/TiSiN PVD coating (≈3.0 μm total thickness)
• Coating Hardness: 3,300 HV (Vickers)
• Oxidation Resistance: Up to 1,100°C
• Coating Adhesion: HF1 (Rockwell C adhesion test)
• Surface Finish: Ra 0.15 μm (as-sintered flute surface)
• Color: Bronze-copper (characteristic of TiAlN-rich coating)

Grade Comparison Matrix

Chipbreaker Profile

The SGM08169 features an optimized two-flute geometry designed specifically for micro-drilling applications:

• Flute Form: Parabolic deep-flute profile with polished surface (Ra ≤ 0.2 μm) to minimize chip adhesion
• Chipbreaker Geometry: Continuous helical rake face with 8° positive rake angle and 15° clearance angle
• Chip Evacuation: Open flute design with 0.36 mm flute width enables reliable chip flow in blind-hole applications up to 2.5×D
• Edge Preparation: Micro-honed cutting edge (T-land width 0.02 mm, angle 20°) to prevent chipping on entry
• Web Thinning: Split-point web thinning reduces thrust force by approximately 25% compared to standard chisel-edge drills

Recommended Applications & Workpiece Materials

Application Map by Operation

Recommended Cutting Conditions

General Parameters for Carbon & Alloy Steel (≤ 35 HRC):

Operating Guidelines

• Run-out Tolerance: Maintain tool run-out ≤ 0.01 mm at the tool tip. Excessive run-out causes uneven wear and premature corner breakdown.
• Peck Drilling: For depths > 2×D, use peck cycles with 0.5–0.8×D peck depth and full retract to break chips. Reduce peck depth to 0.3×D for stainless steel.
• Entry Surface: Ensure the entry surface is flat and perpendicular to the drill axis. Use a 90° spot drill (diameter 1.5×D) for inclined or curved surfaces.
• Coolant Flow: Minimum coolant flow rate of 5 L/min for external coolant; 15 L/min at 30 bar for through-tool coolant systems.
• Tool Life Indicator: Monitor flank wear (VB). Regrind or replace when VB = 0.1 mm or when hole diameter tolerance exceeds IT9 limits.
• Speed/Feed Adjustment: If chip welding occurs, increase cutting speed by 10% and reduce feed by 15%. If corner chipping occurs, reduce speed by 15%.
• Storage: Store in original packaging at < 30°C and < 60% RH. Avoid contact between cutting edges and hard surfaces.

Toolholder Compatibility

Packaging & Ordering Information

• Packaging: Individual plastic tube with foam insert (10 tubes per inner box, 100 tubes per master carton)
• Minimum Order Quantity: 1 piece
• Lead Time: Stock item – ships within 24 hours for orders placed before 14:00 GMT
• Unit Price: $52.7 USD (ex-works, subject to volume discounts)
• Volume Pricing: 10+ pieces: 5% discount | 50+ pieces: 12% discount | 100+ pieces: 18% discount
• Warranty: 12-month manufacturer defect warranty from date of invoice
• HS Code: 8207.70.30 (Interchangeable tools for drilling)

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