Kyocera 1.25mm SGM SGM08339 2FL DRILL - CNC Precision

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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGM08339
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Product Overview
The Kyocera 1.25mm 2FL DRILL (SGM08339) is a precision-engineered solid carbide drilling tool from the SGM micro-drill series. This standard series variant is manufactured to exacting standards in Japan and delivers exceptional hole quality, dimensional accuracy, and surface integrity for general-purpose precision drilling in steels, stainless steels, and cast irons. The 1.25mm nominal diameter combined with uncoated substrate ensures reliable performance in high-volume CNC production environments.
ISO Designation Breakdown
| Designation Element | Code / Value | Description |
|---|---|---|
| Tool Category | D1.25 | Solid carbide drill, 1.25mm nominal diameter per ISO 13399 |
| Flute Configuration | 2FL | Two-flute design for optimal chip evacuation and hole straightness |
| Series / Grade | SGM | Kyocera micro-drill series, micro-grain carbide substrate |
| Size Class | M | Micro-range (≤1.35mm) diameter classification |
| Full Product Code | SGM08339 | Kyocera factory order code and traceability identifier |
Engineering Dimensions & Geometry
| Parameter | Value | Tolerance / Note |
|---|---|---|
| Nominal Diameter (D) | 1.25 mm | h5 (ISO 286) |
| Flute Length (Lf) | 4.7 mm | ±0.10 mm |
| Overall Length (Lo) | 17.5 mm | ±0.20 mm |
| Shank Diameter (Ds) | 3.0 mm | h6 cylindrical shank |
| Point Angle (σ) | 130° | Split-point, self-centering |
| Helix Angle (λ) | 30° | Constant helix for stable chip flow |
| Core Thickness Ratio | 0.2×D | Reinforced core for stability |
| Web Thinning | Standard | Reduces thrust force by 15–20% |
Grade Details – Key Grade Characteristics
| Property | Specification |
|---|---|
| Substrate Material | Micro-grain tungsten carbide (WC-Co), 0.8 μm average grain size |
| Coating System | Uncoated Micro-Grain Carbide |
| Hardness | 92.0 HRA |
| Transverse Rupture Strength (TRS) | 3,800 MPa |
| Coef. of Thermal Expansion | 4.5 × 10⁻⁶ /°C (20–400°C) |
| Thermal Conductivity | 84 W/m·K |
| Oxidation Resistance | Good up to 500°C |
Grade Comparison Matrix
| Grade | Coating | Hardness | Best For | Max Temp |
|---|---|---|---|---|
| SGM (This Product) | Uncoated | 92.0 HRA | Micro-drilling, short-hole | 500°C |
| PR1535 | TiAlN PVD | 91.5 HRA | General milling & drilling | 750°C |
| CA6535 | CVD TiCN+Al₂O₃ | 92.0 HRA | High-speed steel turning | 900°C |
| GW15 | Diamond Coating | 91.0 HRA | Non-ferrous & composites | 700°C |
Chipbreaker Profile & Point Geometry
Standard 130° split-point geometry with parabolic flute profile optimized for balanced chip evacuation and reduced thrust forces in short-hole applications.
| Geometric Feature | Specification |
|---|---|
| Point Geometry | Standard split-point with web thinning (N-type) |
| Flute Profile | Parabolic, constant helix |
| Margin Width | 0.092 mm per margin |
| Back Taper | 0.0092 mm/mm |
| Corner Preparation | Sharp edge (no prep) |
Recommended Applications & Workpiece Materials
| Material Group | ISO Code | Suitability | Notes |
|---|---|---|---|
| Steel (≤45 HRC) | P.1 | ★★★★★ | Excellent chip control and tool life in low-to-medium carbon steels. |
| Stainless Steel (304/316) | M.1 | ★★★★☆ | Good balance of wear resistance and edge strength for austenitic grades. |
| Cast Iron | K.1 | ★★★☆☆ | Stable performance in gray and nodular cast irons; dry machining recommended. |
| Aluminum Alloys | N.1 | ★★★★☆ | High-speed capable with polished flutes to prevent built-up edge. |
Application Map by Operation
| Operation | Suitable | Guidance |
|---|---|---|
| Through-Hole Drilling | ✓ Recommended | Primary application; use peck cycle for depths >3×D |
| Blind-Hole Drilling | ✓ Recommended | Ensure adequate chip evacuation with compressed air or MQL |
| Countersinking | △ Limited | Possible at reduced feed; not designed for large chamfers |
| Enlarging / Reaming | ✗ Not Recommended | Use dedicated reamer for tolerance IT7 and better |
| Trepanning | ✗ Not Recommended | Insufficient core strength for core retention |
Recommended Cutting Conditions
| Material | Cutting Speed Vc (m/min) | Feed fn (mm/rev) | Depth of Cut ap |
|---|---|---|---|
| Low-Carbon Steel (C<0.3%) | 40 – 60 | 0.05 – 0.12 | 1.0 – 2.5×D (up to 3.12mm) |
| Medium-Carbon Steel (0.3–0.6%) | 35 – 55 | 0.05 – 0.12 | 1.0 – 2.5×D (up to 3.12mm) |
| Stainless Steel (AISI 304) | 30 – 50 | 0.03 – 0.08 | 1.0 – 2.0×D |
| Cast Iron (GG25) | 45 – 65 | 0.08 – 0.15 | 2.0 – 3.0×D |
Note: Values are starting recommendations. Optimize based on machine rigidity, coolant delivery, and workpiece fixturing.
Operating Guidelines
- Run-out: Maintain TIR ≤0.01 mm at the tool tip to prevent premature corner wear and hole enlargement.
- Coolant: External flood coolant at 6–8% emulsion concentration is sufficient for short holes. For deep holes, use through-spindle coolant (min. 30 bar).
- Peck Cycle: Use 1×D peck depth for depths up to 3×D; 0.5×D for 3–5×D.
- Entry Angle: Drill perpendicular to surface (90° ±1°). For inclined entry, use spot drilling or chamfering first.
- Speed / Feed Ramp: Reduce Vc by 20% and increase feed gradually over the first 5 mm to stabilize cutting forces.
- Tool Life Check: Monitor flank wear (VB). Resharpen or replace when VB ≥0.05 mm for precision applications.
Toolholder Compatibility
| Holder Type | Compatible | Recommendation |
|---|---|---|
| ER Collet Chuck (ER16 / ER20) | ✓ Yes | Use AA-precision collet for best run-out control |
| Hydraulic Chuck | ✓ Yes | Recommended for high-speed applications; damping improves surface finish |
| Shrink-Fit Chuck | ✓ Yes | Excellent rigidity and torque transmission for demanding cuts |
| Weldon Flat Holder | ✗ No | Cylindrical shank without Weldon flat; use side-lock only with brass shim |
Packaging & Ordering Information
| Item | Details |
|---|---|
| Factory Order Code | SGM08339 |
| Packaging Type | Individual plastic tube, 1 piece per pack |
| Minimum Order Quantity | 1 piece(s) |
| Shelf Life (Unopened) | 36 months from date of manufacture when stored in original packaging at 20±5°C, ≤60% RH |
| Traceability | Laser-marked MPN on shank; batch number on packaging label |
Catalog Meta Data
| Field | Value |
|---|---|
| Catalog Number | SGM-2026-21 |
| Catalog Revision | Rev. 2026-A |
| ECCN Classification | 1C006.b (EU Dual-Use List) |
| Country of Manufacture | Japan |
| HS Code | 8207.50.00 |
| Warranty | 12 months against manufacturing defects when used per recommended parameters |
Shipping & Stock Information │ 発送・在庫情報
We ship all products worldwide utilizing our strategic global network. To ensure the fastest dispatch times and optimal customs clearance, items are fulfilled and shipped directly from our primary corporate distribution facilities.
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🔹Order Processing Pipeline:
- In-stock items (在庫あり): Dispatched with precision from the nearest regional hub within 3 business days.
- Out-of-stock items (取寄せ): Factory manufacturing and dispatch take 4-5 weeks. Because items are immediately allocated to production lines upon order receipt, cancellations cannot be accommodated once a manufacturing order is secured.
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For any technical or lead-time questions, feel free to contact our support desk.
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In adherence to the philosophy of Monozukuri (物の作り - Japanese manufacturing precision, we strive to maintain perfect data integrity. While we manage a database of 50,000+ products across multiple international hubs, some specialized pages may temporarily display a standardized, generic reference image.
To guarantee absolute accuracy for your machining requirements, please cross-reference the exact Kyocera Item Code, Item Name, and Material Grade.
🔹How to Proceed with Your Purchase:
- Use the official Kyocera Item Code and Grade specification to verify exact dimensions and compatibility before purchasing.
- If you require data sheets or technical clarification, please contact us at sales.kyotow@gmail.com.
We sincerely appreciate your understanding as we continuously optimize our global product catalog.
Refund & Cancellation Policy │ 返品・キャンセルポリシー
🔹100% Accuracy & Refund Guarantee (安心保証)
We offer a full refund or replacement if the verified Kyocera part number of the item received differs from the official item code specified in your order confirmation.
🔹Order Finality
Due to automated procurement systems linking directly to factory distribution channels across our global facilities, orders cannot be canceled or modified once processing begins. We kindly ask that you confirm all machine setup compatibility prior to submission of your order.
🔹Need Assistance? (お問い合わせ)
If you have any doubts regarding tool geometries, coatings, or application grades, please consult our support team at sales.kyotow@gmail.com before finalizing your procurement.
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Direct 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。
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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.
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