Kyocera 21/64 TN SGS51439 DRILL - CNC Operations
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS51439
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Product Overview
The Kyocera 21/64 DRILL 2FL 5XD TN SGS51439 is a premium solid-carbide twist drill engineered for high-performance CNC machining. Featuring a 8.33 mm (0.3281") diameter with a 2-flute design and 5×D flute length, this tool delivers exceptional hole quality, dimensional accuracy, and extended tool life in demanding production environments.
ISO Designation Breakdown
| Designator | Meaning |
|---|---|
| 21/64 | Tool diameter / size identifier (0.3281" / 8.33 mm) |
| DRILL | Primary tool family — solid carbide drill |
| 2FL | 2-flute geometry for balanced chip evacuation |
| 5XD | Flute length = 5 × diameter (41.7 mm) |
| TN | Grade — TiAlN-coated micro-grain carbide for universal application |
| SGS51439 | Manufacturer part number (MPN) |
Engineering Dimensions & Geometry
| Parameter | Value | Tolerance |
|---|---|---|
| Cutting Diameter (D) | 8.33 mm / 0.3281" | h5 |
| Flute Length (L1) | 41.7 mm | +0.5 / -0.3 mm |
| Overall Length (L) | 91 mm | +1.0 / -0.5 mm |
| Point Angle | 140° | ±2° |
| Helix Angle | 30° | ±1° |
| Core Thickness | 2.08 mm (approx. 0.25×D) | ±0.02 mm |
| Margin Width | 1.00 mm | ±0.05 mm |
| Shank Diameter | 8.33 mm (cylindrical) | h6 |
Grade Details — Key Grade Characteristics
| Property | TN Grade Specification |
|---|---|
| Substrate | Micro-grain tungsten carbide (WC-Co), 0.8 μm grain size |
| Coating | TiAlN (Titanium Aluminum Nitride) — multi-layer PVD |
| Coating Hardness | 3,300 HV |
| Coating Thickness | 2.5 ± 0.5 μm |
| Max Operating Temp | 900 °C (dry machining capable) |
| Transverse Rupture Strength | 4,200 MPa |
| Color Code | Copper-bronze (TiAlN characteristic) |
Grade Comparison Matrix
| Grade | Wear Resistance | Toughness | Heat Resistance | Best For |
|---|---|---|---|---|
| TN | ★★★★☆ | ★★★★☆ | ★★★★★ | Universal steel, stainless, cast iron |
| PV | ★★★★★ | ★★★☆☆ | ★★★★☆ | Hardened steels > 50 HRC |
| CA | ★★★☆☆ | ★★★★★ | ★★★☆☆ | Interrupted cuts, roughing |
| GW | ★★★★☆ | ★★★★☆ | ★★★★☆ | Aluminum & non-ferrous alloys |
Chipbreaker Profile
The 21/64 features Kyocera's proprietary SGS (Special Groove System) chipbreaker geometry optimized for 2-flute drills. The polished flute surface (Ra 0.2 μm) minimizes built-up edge, while the widened flute gullet provides efficient chip evacuation for 8.33 mm diameter holes up to 5×D depth.
- Polished rake face reduces cutting forces by ~15% compared to standard ground drills
- Enhanced chip curling radius prevents chip packing in deep-hole applications
- Stable chip formation across feed rates of 0.10–0.25 mm/rev
Recommended Applications & Workpiece Materials
| Material Group | Examples | Machinability |
|---|---|---|
| Carbon Steel | C45, C60, 1045, 1060 | Excellent |
| Alloy Steel | 4140, 4340, 42CrMo4 | Excellent |
| Stainless Steel | 304, 316, 17-4PH | Very Good |
| Cast Iron | GG25, GGG40, Class 40 | Good |
| Tool Steel | H13, D2, O1 (pre-hardened < 45 HRC) | Good |
| Titanium Alloy | Ti-6Al-4V (limited speed) | Moderate |
Application Map by Operation
| Operation | Suitability | Notes |
|---|---|---|
| Through-hole Drilling | ★★★★★ | Primary application; optimized for full breakthrough |
| Blind-hole Drilling | ★★★★☆ | Use peck cycle for depths > 3×D |
| Cross-hole Drilling | ★★★☆☆ | Reduce feed to 70% at intersection |
| Stack Drilling | ★★★★☆ | Ensure rigid clamping; use coolant |
| Enlarging / Reaming | ★★☆☆☆ | Not recommended; use dedicated reamer |
Recommended Cutting Conditions
| Material | Cutting Speed (Vc) m/min | Feed (f) mm/rev | RPM (approx.) |
|---|---|---|---|
| Mild Steel (< 300 HB) | 80–120 | 0.12–0.20 | 4,201 |
| Alloy Steel (300–400 HB) | 60–90 | 0.10–0.16 | 3,121 |
| Stainless Steel (AISI 304) | 50–70 | 0.10–0.14 | 2,400 |
| Cast Iron (GG25) | 90–130 | 0.14–0.22 | 4,561 |
| Tool Steel (40–45 HRC) | 40–60 | 0.08–0.12 | 2,040 |
Conditions based on high-pressure internal coolant supply (70 bar min) and stable toolholder setup. Adjust by ±15% for dry machining.
Operating Guidelines
- Coolant: High-pressure internal coolant (70–150 bar) strongly recommended for 5×D drilling to ensure chip evacuation and heat dissipation.
- Peck Cycle: For blind holes > 3×D, use peck depth of 1.0–1.5×D with full retract to break chips.
- Tool Overhang: Minimize overhang to < 4×D for best rigidity. Use hydraulic or shrink-fit holders for critical applications.
- Entry Angle: Ensure perpendicular entry (±1°) or use a spot drill to prevent walk-off on angled surfaces.
- Speed/Feed Ramp: Reduce feed by 50% for the first 1 mm of engagement, then ramp to full feed over 0.5 mm.
- Re-sharpening: Not recommended; solid carbide design is intended for full tool life consumption. Inspect for flank wear > 0.3 mm as replacement criterion.
Toolholder Compatibility
| Holder Type | Compatibility | Recommendation |
|---|---|---|
| Hydraulic Chuck (Hydro) | ★★★★★ | Best damping; ideal for 5×D applications |
| Shrink Fit | ★★★★★ | Maximum rigidity and runout control (< 3 μm) |
| ER Collet (ER16–ER25) | ★★★★☆ | Acceptable for through-holes; ensure collet quality |
| Milling Chuck | ★★★☆☆ | Use only for short holes (< 2×D) |
| Drill Chuck (Keyless) | ★★☆☆☆ | Not recommended for precision CNC work |
Packaging & Ordering Information
| Item | Details |
|---|---|
| Packaging | Individual plastic protective tube with foam insert; 10 pcs per inner carton |
| Labeling | Laser-marked diameter, MPN, and batch code on shank |
| Minimum Order | 1 piece (no MOQ for standard items) |
| Lead Time | Stock item — ships within 24 hours |
| Warranty | Full Kyocera manufacturer warranty against material and workmanship defects |
Catalog Meta Data
| Field | Value |
|---|---|
| Product ID | 9229 |
| MPN / Order Code | SGS51439 |
| Manufacturer | Kyocera Corporation (Japan) |
| Tool Family | SGS514 Series — 2FL 5XD Solid Carbide Drill |
| Grade | TN (TiAlN coated) |
| ISO 13399 Classification | Drill, solid, carbide, 2-flute, 5×D, cylindrical shank |
| Country of Origin | Japan |
| Date Added | 2026-05-23 |
| Last Modified | 2026-02-23 15:35:57 |
✓ 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
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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
✓ 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.
