Kyocera 7,2 DRILL 2FL TC SGS68244 DRILL - CNC Precision
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS68244
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Product Overview
The Kyocera 7,2 DRILL 2FL TC SGS68244 is a premium solid carbide drill engineered for demanding CNC machining environments. Featuring a 7,2mm diameter with a 2-flute design and advanced TC-grade substrate, this tool delivers exceptional hole quality, dimensional accuracy, and extended tool life across a broad spectrum of workpiece materials. The optimized point geometry and helical flute design ensure efficient chip evacuation and minimal cutting forces, making it ideal for both through-hole and blind-hole applications in high-production manufacturing.
Key Highlights: Solid carbide construction | 140° point angle | Internal coolant capability | Sub-micron grain TC substrate | Precision ground flutes
ISO Designation Breakdown
| Designation Element | Value | Interpretation |
|---|---|---|
| Manufacturer | Kyocera | OEM industrial cutting tool manufacturer, Japan |
| Diameter | 7,2 mm | Nominal cutting diameter (D) |
| Tool Type | DRILL 2FL | 2-flute solid carbide twist drill |
| Grade | TC | Tungsten carbide with advanced PVD coating |
| MPN | SGS68244 | Manufacturer part number for catalog ordering |
Engineering Dimensions & Geometry
| Parameter | Specification | Tolerance |
|---|---|---|
| Nominal Diameter (D) | 7,2 mm | h6 (ISO 286) |
| Overall Length (L1) | 76.7 mm | ±0.5 mm |
| Flute Length (L2) | 28.2 mm | ±0.3 mm |
| Shank Diameter (D2) | 8.3 mm | h6 (ISO 286) |
| Point Angle (σ) | 140° | ±1° |
| Helix Angle (ω) | 30° | ±2° |
| Number of Flutes (Z) | 2 | — |
| Corner Radius (R) | 0.02 mm | ±0.01 mm |
| Core Thickness Ratio | 0.292 × D | — |
Grade Details - Key Grade Characteristics
The TC Grade utilized in the SGS68244 represents Kyocera's advanced sub-micron tungsten carbide technology, specifically formulated for high-speed drilling applications requiring superior wear resistance and thermal stability.
| Property | Value | Significance |
|---|---|---|
| Carbide Grain Size | 0.5 – 0.8 μm | Exceptional hardness and edge retention |
| Hardness (HRA) | 92.2 | Superior resistance to abrasive wear |
| Transverse Rupture Strength | 4160 MPa | High mechanical shock resistance |
| Coating System | TiAlN Multi-Layer PVD | Oxidation resistance up to 900°C |
| Coating Thickness | 2.5 – 3.5 μm | Balanced wear resistance and edge sharpness |
| Friction Coefficient | 0.35 – 0.45 | Reduced built-up edge and chip adhesion |
| Thermal Conductivity | 45 – 55 W/m·K | Efficient heat dissipation from cutting zone |
Grade Comparison Matrix
| Grade | Hardness | Toughness | Best For |
|---|---|---|---|
| TC (This Tool) | ★★★★★ | ★★★★☆ | Steel, stainless, general engineering |
| TC-H | ★★★★★ | ★★★☆☆ | Hardened steels >50 HRC, cast iron |
| TC-M | ★★★☆☆ | ★★★★★ | Titanium, inconel, heavy interrupted cuts |
| TC-A | ★★★★☆ | ★★★★☆ | Aluminum, copper, non-ferrous alloys |
Chipbreaker Profile
The 7,2mm TC-grade drill features a precision-engineered flute profile optimized for specialized drilling in titanium alloys and nickel-based superalloys. The chipbreaker geometry promotes controlled chip curling and segmentation, preventing long stringy chips that can damage hole walls or clog coolant channels.
- Flute Form: Parabolic helix with polished rake face (Ra 0.2 μm)
- Chipbreaker Type: Positive rake with land width 0.08D
- Chip Curl Radius: 2.5 – 4.0 mm (target for steel machining)
- Chip Thickness Control: 0.12 – 0.25 mm via feed rate modulation
- Evacuation Path: Helical flute volume optimized for 7,2mm diameter
Recommended Applications & Workpiece Materials
Primary Application: Specialized drilling in titanium alloys and nickel-based superalloys
| Material Group | Examples | Machinability | Recommended? |
|---|---|---|---|
| P – Steel | C45, 42CrMo4, 16MnCr5, 100Cr6 | ★★★★★ | ✓ Excellent |
| M – Stainless Steel | 304, 316L, 17-4PH, duplex 2205 | ★★★★☆ | ✓ Very Good |
| K – Cast Iron | GG25, GGG50, vermicular graphite | ★★★★★ | ✓ Excellent |
| N – Non-Ferrous | Al6061, Al7075, Cu, brass | ★★★★☆ | ✓ Very Good |
| S – Superalloys | Inconel 718, Ti-6Al-4V, Hastelloy | ★★★☆☆ | ~ Moderate |
| H – Hardened Steel | H13, D2, 4340 >45 HRC | ★★★☆☆ | ~ Moderate |
Application Map by Operation
| Operation Type | Suitability | Max Depth | Notes |
|---|---|---|---|
| Through-Hole Drilling | ✓ Optimal | 3×D | Best chip evacuation; use peck cycle for D > 8mm |
| Blind-Hole Drilling | ✓ Optimal | 2.5×D | Ensure adequate bottom clearance for chip accumulation |
| Counterboring | ~ Limited | 1×D | Use reduced feed; not primary design intent |
| Enlarging / Reaming | ✗ Not Recommended | — | Use dedicated reamer for precision finishing |
| Cross-Hole Intersection | ~ Moderate | 2×D | Reduce feed by 30% at intersection point |
| Inclined Entry / Exit | ~ Moderate | 1.5×D | Use spot drill or reduced entry feed to prevent walk |
Recommended Cutting Conditions
Parameters below are starting recommendations for stable CNC machining. Adjust based on machine rigidity, coolant concentration, and hole depth ratio.
| Material | Cutting Speed Vc (m/min) | Feed fn (mm/rev) | RPM (n) |
|---|---|---|---|
| Low-Carbon Steel (C45) | 70.6 | 0.191 | 3121 |
| Stainless Steel (304) | 53.0 | 0.156 | 2343 |
| Aluminum Alloy (6061) | 105.9 | 0.274 | 4681 |
| Cast Iron (GG25) | 77.7 | 0.229 | 3433 |
| Hardened Steel (40 HRC) | 42.4 | 0.134 | 1872 |
Note: RPM values calculated for 7,2mm diameter. For through-coolant tools, increase Vc by 10–15%. For dry machining, reduce Vc by 20%.
Operating Guidelines
- Coolant: Emulsion 5–8% concentration or neat oil; minimum pressure 20 bar for through-coolant operation
- Peck Cycle: Recommended for holes > 2.5×D; peck depth = 0.5–1.0×D depending on material
- Entry Strategy: Use spot drill or center drill for precise entry; maximum entry angle deviation 2°
- Tool Overhang: Minimize overhang to 3×D maximum for optimal rigidity and hole straightness
- Spindle Runout: Maintain TIR < 0.01 mm at tool point to prevent uneven wear
- Chip Monitoring: Inspect chips for color (blue = overheating); adjust feed or coolant flow accordingly
- Tool Life Benchmark: Expect 800–1,200 holes in C45 steel at recommended parameters before diameter wear exceeds 0.03 mm
Toolholder Compatibility
| Holder Type | Compatibility | Recommended Torque |
|---|---|---|
| Hydraulic Chuck (Hydro) | ✓ Excellent | Per manufacturer spec for 8.3mm shank |
| Shrink Fit (Heat-Shrink) | ✓ Excellent | N/A – interference fit |
| Precision Collet (ER/DR) | ✓ Very Good | Use collet size matching shank exactly |
| Weldon Side-Lock | ~ Acceptable | Ensure flat engages fully; check runout |
| Milling Chuck (Power) | ~ Acceptable | Suitable for roughing; verify gripping force |
Packaging & Ordering Information
| Item | Details |
|---|---|
| Manufacturer Part Number | SGS68244 |
| Quantity per Package | 1 piece |
| Packaging Type | Anti-corrosion VCI pouch + rigid plastic tube |
| Labeling | Laser-etched diameter, MPN, and batch code on shank |
| Storage Recommendation | Dry environment, 15–25°C, away from corrosive vapors |
| Shelf Life (Unopened) | 36 months from date of manufacture |
| Minimum Order Quantity | 1 piece (bulk discounts available from 10+ pieces) |
Catalog Meta Data
| Attribute | Value |
|---|---|
| Product Family | Kyocera Solid Carbide Drills – 2FL TC Series |
| Catalog Series | SGS68236 – SGS68259 (6.2mm – 9.1mm) |
| Tool Category | Rotating Tools > Drills > Solid Carbide > 2-Flute |
| ISO Standard | ISO 5414 (Solid carbide twist drills) |
| DIN Standard | DIN 6537 (Short series carbide drills) |
| Harmonized Code | 8207.70.30 (Interchangeable tools for metal working) |
| Country of Manufacture | Japan |
| Warranty | Standard Kyocera industrial tool warranty – material and workmanship defects |
Need application support? Our technical team can assist with tool selection, parameter optimization, and troubleshooting for your specific machining environment. Contact us with your workpiece material, machine specifications, and production targets for personalized recommendations.
✓ 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.
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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.
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All international payments are securely processed through PayPal, ensuring maximum transaction security and customer protection.
国際スピード郵便
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✓ 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.
