Kyocera SGM PR1535 SGM08255 2FL Drill - Circuit Board

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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGM08255
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Product Overview
The Kyocera 0,31 DRILL 2FL SGM08255 is a premium solid carbide micro-drill engineered for high-precision CNC machining operations. With a nominal diameter of 0,31mm, this tool is specifically designed for general precision engineering, tool making, and die casting. It features an optimized 2-flute geometry that ensures exceptional chip evacuation, superior hole quality, and extended tool life in demanding production environments.
ISO Designation Breakdown
| Element | Code | Description |
|---|---|---|
| Tool Category | D | Drill (ISO 13399) |
| Diameter | 0,31 | Nominal cutting diameter in millimeters |
| Flute Count | 2FL | Two-flute design for balanced chip evacuation |
| Series | SGM | Superior Grade Micro-drill series |
| MPN | SGM08255 | Manufacturer Part Number |
| Grade | PR1535 | Micro-grain PVD-coated carbide |
Engineering Dimensions & Geometry
| Parameter | Value | Tolerance |
|---|---|---|
| Cutting Diameter (D) | 0,31 mm | h7 (-0.014 mm) |
| Flute Length (Lf) | 1.24 mm | ±0.10 mm |
| Overall Length (L) | 50 mm | ±0.50 mm |
| Shank Diameter (Ds) | 3.0 mm | h6 |
| Point Angle | 140° | ±2° |
| Helix Angle | 30° | ±2° |
Grade Details - Key Grade Characteristics
The PR1535 grade is a micro-grain carbide substrate with advanced PVD multi-layer coating technology, specifically developed for high-precision micro-machining applications.
- Substrate: Ultra-fine 0.5μm tungsten carbide grain structure for superior edge sharpness and wear resistance
- Coating: TiAlN-based multi-layer PVD coating with enhanced hardness (HV 3,200) and oxidation resistance up to 900°C
- Edge Preparation: Micro-honed edge radius (4–6μm) for optimal edge stability without compromising sharpness
- Surface Finish: Mirror-polished flute surfaces (Ra 0.05μm) to minimize friction and prevent chip adhesion
Grade Comparison Matrix
| Grade | Coating | Hardness | Best For |
|---|---|---|---|
| PR1535 | TiAlN PVD Multi-layer | 93.0 HRA | Steel, Stainless, High-precision |
| CA6535 | Uncoated | 91.5 HRA | Aluminum, Copper, Non-ferrous |
| PR1725 | TiSiN PVD | 93.0 HRA | Hardened steel >50 HRC |
Chipbreaker Profile
The 0,31mm SGM series features an optimized point geometry and flute design specifically engineered for micro-drilling operations:
- Point Geometry: Modified split-point design with self-centering capability to reduce thrust force by up to 40%
- Flute Profile: Parabolic flute form with increased core taper for enhanced chip evacuation in deep-hole applications
- Margin Design: Dual-margin configuration with polished lands to ensure hole straightness and dimensional accuracy
- Edge Geometry: Precision-ground primary and secondary relief angles optimized for 0,31mm diameter
Recommended Applications & Workpiece Materials
| Material Group | Examples | Machinability |
|---|---|---|
| Carbon Steel | C45, C50, 1045, 1050 | ★★★★★ Excellent |
| Alloy Steel | 4140, 4340, 20CrMo | ★★★★☆ Very Good |
| Stainless Steel | 304, 316, 17-4PH | ★★★★☆ Very Good |
| Cast Iron | GG25, GGG40, FC250 | ★★★★☆ Very Good |
| Aluminum Alloy | 6061, 7075, 2024 | ★★★★★ Excellent |
Application Map by Operation
| Operation Type | Suitability | Max Depth (L/D) | Notes |
|---|---|---|---|
| Through-hole Drilling | ✓ Recommended | 5xD | Optimal chip evacuation |
| Blind-hole Drilling | ✓ Recommended | 5xD | Use peck cycle recommended |
| Micro-interpolation | △ Possible | — | Requires rigid setup |
| Enlarging | ✗ Not Recommended | — | Use dedicated reamer |
Recommended Cutting Conditions
| Workpiece Material | Cutting Speed Vc (m/min) | Feed f (mm/rev) | Coolant |
|---|---|---|---|
| Carbon Steel (<30 HRC) | 25–40 | 0.0099–0.0149 | External / MQL |
| Alloy Steel (30–45 HRC) | 20–35 | 0.0087–0.0136 | External / Through-spindle |
| Stainless Steel | 18–30 | 0.0074–0.0124 | External / Through-spindle |
| Aluminum Alloy | 50–80 | 0.0186–0.0310 | Air blast / MQL |
| Cast Iron | 30–50 | 0.0112–0.0161 | Dry / Air blast |
Operating Guidelines
- Peck Drilling: For holes deeper than 2xD, use a peck cycle with retract of 0.5–1xD to ensure proper chip evacuation and prevent breakage. Standard peck cycle for depths >3xD
- Coolant Strategy: External coolant or through-spindle (15–40 bar)
- Runout Tolerance: Maintain total indicated runout (TIR) below 5μm at the tool tip for optimal tool life and hole quality
- Entry Angle: When drilling inclined surfaces, use a spot drill or center drill first, or reduce feed to 50% for the first 0.3mm
- Speed Ramp: Reduce cutting speed by 15–20% when entering cross-holes or interrupted cuts
Toolholder Compatibility
| Holder Type | Recommended Size | TIR Capability | Best For |
|---|---|---|---|
| Precision Collet Chuck | ER11 / ER16 (φ3mm) | <5μm | General precision drilling |
| Hydraulic Chuck | HSK-E32 / HSK-E40 | <3μm | High-speed micro-drilling |
| Shrink Fit Chuck | φ3mm interface | <2μm | Ultra-precision applications |
Packaging & Ordering Information
| Item | Details |
|---|---|
| Packaging Unit | 1 piece per plastic protective tube |
| Minimum Order Quantity | 1 piece |
| Lead Time | Stock item — available for immediate dispatch |
| Warranty | Full manufacturer warranty against defects |
Catalog Meta Data
| Attribute | Value |
|---|---|
| Product Series | SGM — Superior Grade Micro-drill |
| Tool Category | Solid Carbide Drill — 2 Flute |
| Manufacturer | Kyocera Corporation |
| Catalog Page | SGM Series Micro-Drills 2026 |
| Last Updated | June 2026 |
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.
🔹Stock Enquiries (在庫確認): Kyotow manages a vast international inventory. To check real-time stock availability and identify which regional facility your order will ship from, please contact our logistics team at sales.kyotow@gmail.com.
🔹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.
- Genuine Products Guarantee (本物保証): Every item listed on Kyotow is 100% authentic, high-quality, and sourced directly through authorized domestic Japanese and global distribution networks.
For any technical or lead-time questions, feel free to contact our support desk.
Product Images & Technical Accuracy │ 正確な製品情報
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.
Payments & Security │ 安全な決済方法
We process all international payments securely through PayPal, ensuring encrypted data protection and a safe, hassle-free global transaction.

Fast & Reliable Worldwide Shipping │ 国際スピード郵便
We provide priority worldwide logistics exclusively through our corporate DHL Express account, tracking shipments seamlessly from our hubs in Asia, Europe, and China. Enjoy reliable global distribution with a flat shipping rate of $50 USD for all international destinations.

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。
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.







