Kyocera 7,9 TX SGS66758 Drill - CNC Precision Drilling
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS66758
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Product Overview
The Kyocera 7,9 TX SGS66758 is a premium solid carbide drill engineered for demanding CNC machining environments. Featuring a 2FL-flute design with an 12XD length-to-diameter ratio, this tool delivers exceptional hole quality, dimensional accuracy, and extended tool life across a broad spectrum of workpiece materials. The TX grade substrate with advanced coating technology ensures stable performance under high-speed cutting conditions.
ISO Designation Breakdown
| ISO Element | Code | Description |
| Tool Type | D | Solid carbide drill |
| Diameter (Dc) | 7,9 mm | Nominal cutting diameter |
| Length Ratio | 12XD | 12×D extended reach configuration |
| Grade | TX | High-performance carbide grade |
| Flutes (Z) | 2 | Two-flute design for chip evacuation |
Engineering Dimensions & Geometry
| Parameter | Value | Tolerance |
| Cutting Diameter (Dc) | 7,9 mm | h6 |
| Overall Length (L1) | 127.3 mm | ±0.5 mm |
| Flute Length (L2) | 94.8 mm | ±0.3 mm |
| Shank Diameter (D2) | 7.9 mm | h5 |
| Point Angle (σ) | 140° | ±2° |
| Helix Angle (β) | 35° | ±1° |
| Corner Radius (r) | 0.05 mm | ±0.01 mm |
Grade Details - Key Grade Characteristics
The TX grade represents Kyocera's advanced carbide substrate technology, specifically developed for high-performance drilling operations:
- Substrate: Ultra-fine grain carbide (0.6 μm) for superior edge sharpness and wear resistance
- Coating: Multi-layer PVD (TiAlN + TiSiN) with nano-composite structure
- Hardness: 92.5 HRA (1,600 HV30) for excellent abrasion resistance
- Transverse Rupture Strength: 3,800 MPa for high mechanical reliability
- Thermal Conductivity: 45 W/m·K for efficient heat dissipation
Grade Comparison Matrix
| Property | TX (This Product) | Standard Grade | Competitor A |
| Hardness (HRA) | 92.5 | 91.0 | 91.5 |
| TRS (MPa) | 3,800 | 3,200 | 3,400 |
| Coating Layers | Multi-layer PVD | Single-layer | Dual-layer |
| Max Cutting Temp | 1,100°C | 900°C | 950°C |
Chipbreaker Profile
The 7,9 drill features an optimized chipbreaker geometry designed for 12XD drilling applications:
- Chipbreaker Type: TX-profile with polished rake face
- Rake Angle (γ): 12° positive for reduced cutting forces
- Flute Form: Parabolic flute design for enhanced chip flow
- Edge Preparation: Honing radius 0.02 mm for edge stability
- Chip Control: Optimized for short, manageable chip formation in through-hole and blind-hole operations
Recommended Applications & Workpiece Materials
| Material Group | ISO Code | Machinability | Recommended |
| Low-alloy / Carbon Steel | P10-P30 | Excellent | ✓ Primary |
| Stainless Steel (Austenitic) | M20-M30 | Very Good | ✓ Primary |
| Cast Iron (Gray / Ductile) | K20-K30 | Good | ✓ Suitable |
| Hardened Steel (up to 45 HRC) | H20-H30 | Good | ✓ Suitable |
| Titanium Alloys | S10-S20 | Moderate | ✓ Suitable |
Application Map by Operation
| Operation Type | Suitability | Max Depth | Notes |
| Through-hole Drilling | ★★★★★ | 12XD (12×D) | Optimal chip evacuation |
| Blind-hole Drilling | ★★★★☆ | 8×D | Use peck cycle recommended |
| Stack Plate Drilling | ★★★★☆ | 6×D per plate | Excellent positional accuracy |
| Inclined Entry | ★★★☆☆ | 3×D | Max 15° inclination angle |
| Cross-hole Drilling | ★★★☆☆ | 4×D | Reduce feed by 30% |
Recommended Cutting Conditions
| Workpiece Material | Cutting Speed Vc (m/min) | Feed fn (mm/rev) | Coolant |
| Low-alloy Steel (P20) | 77.0 - 97.0 | 0.165 - 0.215 | External / Internal |
| Stainless Steel (M20) | 58.0 - 73.0 | 0.132 - 0.172 | External / Internal |
| Gray Cast Iron (K25) | 107.0 - 127.0 | 0.198 - 0.258 | Dry / External |
| Hardened Steel (40 HRC) | 40 - 60 | 0.083 - 0.113 | External / Internal |
| Titanium Alloy (Ti6Al4V) | 30 - 45 | 0.099 - 0.129 | High-pressure internal |
Note: Values are starting recommendations. Optimize based on machine rigidity, workpiece setup, and coolant delivery efficiency.
Operating Guidelines
- Run-out Tolerance: Maintain TIR ≤ 0.01 mm at the tool tip for optimal hole accuracy
- Coolant Pressure: Minimum 20 bar (290 PSI) for internal coolant; 10 bar for external flood coolant
- Peck Cycle: For depths > 5×D, use peck depth of 1.5×D with full retract to break chips
- Entry Surface: Ensure perpendicular entry or use center drill / spot drill for inclined surfaces > 5°
- Pre-drilling: Not required for standard applications; use pilot hole only for cross-hole or curved entry
- Tool Life Monitoring: Expected tool life 15-25 minutes in continuous steel machining; inspect after 10 minutes for wear patterns
Toolholder Compatibility
| Holder Type | Standard | Min Bore | Clamping |
| Hydraulic Chuck | DIN 69871 / ISO 7388 | 8.4 mm | Hydro-grip |
| Shrink Fit Holder | HSK-A63 / HSK-A100 | 7.9 mm | Thermal shrink |
| Collet Chuck (ER) | ER25 / ER32 / ER40 | 8.1 mm | Spring collet |
| Milling Chuck | BT40 / BT50 / DIN 69893 | 8.9 mm | Mechanical clamp |
Ensure holder run-out is ≤ 0.005 mm for 12XD drilling applications to prevent vibration and premature wear.
Packaging & Ordering Information
| Item | Details |
| MPN / Order Code | SGS66758 |
| Packaging Unit | 1 piece per plastic tube with foam insert |
| Minimum Order Quantity | 1 piece |
| Bulk Packaging | 10 pieces per master carton (bulk orders) |
| Warranty | Standard manufacturer warranty against material defects |
| Certificate | ISO 9001:2015 manufacturing compliance |
Catalog Meta Data
| Attribute | Value |
| Product Family | Kyocera Solid Carbide Drill Series |
| Series Designation | TX-Grade Extended Reach Drills |
| Catalog Page | 2024-2025 Precision Tools Catalog, Section D-12 |
| ECCN Classification | 1A002 (dual-use goods) |
| Country of Manufacture | Japan |
| Last Catalog Update | 2024-Q3 |
Technical Support: For application-specific recommendations, cutting parameter optimization, or custom tooling solutions, contact our technical engineering team. All specifications are subject to standard manufacturing tolerances. Verify compatibility with your machine tool and workpiece material before operation.
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
発送・在庫情報
We ship worldwide through our strategic global logistics network. Products are dispatched directly from our international distribution facilities to ensure efficient delivery and customs clearance.
-
Stock Enquiries (在庫確認):
Contact our logistics team at sales.kyotow@gmail.com for real-time inventory status and dispatch location information. -
In-Stock Items (在庫あり):
Normally dispatched within 3 business days from the nearest regional warehouse. -
Factory Procurement (取寄せ):
Manufacturing and dispatch typically require 4–5 weeks. Once production begins, cancellations cannot be accommodated. -
Authenticity Guarantee (本物保証):
All products sold by Kyotow are 100% genuine and sourced through authorized Japanese and international distribution channels.
正確な製品情報
Following the Japanese philosophy of Monozukuri (物の作り), we strive to maintain exceptional technical accuracy throughout our product catalog.
- Confirm dimensions, geometry, coating, and grade using the official Kyocera item code.
- Technical datasheets are available upon request.
- For technical clarification contact sales.kyotow@gmail.com.
返品・キャンセルポリシー
-
100% Accuracy Guarantee:
Full refund or replacement will be provided if the verified Kyocera item received differs from the official item code specified in your order confirmation. -
Order Finality:
Due to automated procurement systems connected directly to global factory distribution channels, orders cannot be modified or cancelled once processing has commenced. -
Technical Assistance:
Please verify machine compatibility, insert geometry, coating, and application grade before placing your order.
安全な決済方法
✓ Encrypted Transactions
✓ Global Buyer Protection
✓ Safe International Payments
All international payments are securely processed through PayPal, ensuring maximum transaction security and customer protection.
国際スピード郵便
✓ Full Shipment Tracking
✓ Global Logistics Network
✓ Flat Worldwide Shipping Rate: USD $50
Orders are shipped through our DHL Express corporate account from distribution facilities across Asia, Europe, and China for reliable international delivery.
Need Technical Assistance?
Contact our industrial tooling specialists for application support, tooling recommendations, datasheets, and compatibility verification.
sales.kyotow@gmail.comDirect Supply Chain Transparency サプライチェーンの透明性
Why are our prices so low? (価格が安い理由): Kyotow sources genuine Kyocera tools directly from domestic Japanese distribution networks, completely bypassing the steep regional markups, localized sales overhead, and heavy middleman margins of Western distributors. We pass 100% of those structural savings directly to your machine shop.
Kyotowは日本の国内流通ネットワークから京セラ正規品を直接仕入れることで、欧米の現地代理店による大幅な上乗せ価格や営業コスト、中間マージンを完全に排除しています。その構造的メリットを、お客様の加工現場へ100%還元いたします。
Domestic Sourced
Procured straight from Japan's local wholesale networks to capture maximum market arbitrage.
100% Genuine
Zero counterfeit risk. All items are brand-new, authentic factory-sealed Japanese stock.
No Regional Markups
We bypass Western corporate sales teams and localized regional overhead costs entirely.
