Kyocera 10,9 TX SGS66788 Carbide Drill - High-Speed Steel Machining

Product Overview

The Kyocera 10,9 mm TX Grade Carbide Drill (SGS66788) is a precision-engineered 2-flute solid carbide tool designed for 12×D deep-hole drilling operations. Manufactured in Japan to ISO 9001 standards, this drill combines an ultra-fine carbide substrate with an advanced AlCrSiN PVD coating to deliver exceptional wear resistance, thermal stability, and chip evacuation in demanding CNC environments. The 10,9 mm diameter is specifically optimized for high-speed steel machining across aerospace, automotive, and general engineering sectors.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details - Key Grade Characteristics

The TX grade is a Kyocera proprietary PVD-coated carbide grade engineered specifically for high-performance drilling in ferrous and non-ferrous materials. Key characteristics include:

• Coating System: AlCrSiN-based PVD multi-layer with enhanced oxidation resistance up to 1,100°C
• Substrate Hardness: 92.5 HRA for superior edge retention
• Transverse Rupture Strength: 3,800 MPa — resists chipping in interrupted cuts
• Carbide Grain Size: 0.8 μm ultra-fine tungsten carbide for high toughness
• Coating Thickness: 2.5–3.0 μm for optimal thermal barrier without edge rounding
• Friction Coefficient: 0.35 (dry) / 0.22 (with coolant) — minimizes built-up edge

Grade Comparison Matrix

Chipbreaker Profile

The IC (Internal Coolant) chipbreaker geometry features a precision-ground groove with variable width and depth optimized for {diam} mm diameter drilling. The profile ensures:

• Chip Forming: Tight spiral chip curl radius of 1.2–1.8 mm for reliable breakage
• Coolant Delivery: Dual internal coolant channels (Ø0.8 mm) directed to the cutting lips at 15° inclination
• Edge Preparation: 0.02 mm × 20° T-land honing for micro-chipping resistance
• Rake Angle: 8° positive rake for reduced cutting forces and improved surface finish
• Relief Angle: 12° primary relief + 25° secondary relief to minimize flank wear

Recommended Applications & Workpiece Materials

The Kyocera 10,9 mm TX drill is validated for the following material groups and application scenarios:

Application Map by Operation

Recommended Cutting Conditions

Parameters are based on stable machine conditions, rigid workpiece clamping, and internal coolant supply at minimum 3 bar pressure. Adjustments may be required for less rigid setups.

Operating Guidelines

• Run-out Tolerance: Ensure spindle run-out ≤ 0.01 mm at the tool tip. Excessive run-out accelerates corner wear and reduces hole accuracy.
• Coolant Pressure: Minimum 3 bar (recommended 5–7 bar) for holes > 8×D. Insufficient pressure leads to chip packing and premature failure.
• Entry Angle: Use a 90° entry surface or chamfer (0.5 × D × 45°) to prevent burr formation and wandering on inclined surfaces.
• Peck Cycle: For 12×D drilling, implement a peck cycle: 1st peck = 2×D, 2nd peck = 1×D, subsequent pecks = 0.5×D with full retract to break chips.
• Speed/Feed Ramp: Reduce spindle speed by 20% and feed by 10% for the first 5 holes to season the cutting edge.
• Tool Life Monitoring: Monitor flank wear (VB) at 0.2 mm maximum. Replace immediately if chipping, cracking, or discoloration is observed.

Toolholder Compatibility

Packaging & Ordering Information

• Packaging: Individual plastic tube with foam insert, 10 pieces per master carton, barcode label with MPN and batch number
• Minimum Order Quantity: 1 piece (bulk discounts available for 50+ units)
• Lead Time: Stock item — ships within 24 hours of order confirmation
• Warranty: Full manufacturer warranty against material and workmanship defects for 12 months from date of purchase
• Traceability: Each tool is laser-marked with Kyocera logo, diameter, MPN (SGS66788), and production batch code

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