Kyocera 1/4 DRILL 6FL PR1225 SGS74255 Drill - Steel Machining
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS74255
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1. Product Overview
The 1/4 DRILL 6FL Drill (MPN: SGS74255) is a precision-engineered solid carbide drilling tool manufactured by Kyocera in Japan. Featuring the advanced PR1225 grade substrate with MEGACOAT (TiAlN + TiN) coating technology, this 6-flute drill delivers exceptional performance in steel machining applications. Designed for CNC machining centers and turning centers, it ensures high-precision hole-making with superior surface finish, dimensional accuracy, and extended tool life under demanding production conditions. The 1/4 DRILL 6FL is part of the SGS Solid Carbide Drill and is suitable for steel machining across aerospace, automotive, energy, and general manufacturing sectors.
2. ISO Designation Breakdown
| Component | Code | Description |
|---|---|---|
| Tool Family | SGS | SGS Solid Carbide Drill |
| ISO Designation | SGS-1-4-6F-PR1225 | ISO 13399 compliant designation |
| Flute Count | 6F | Number of helical cutting flutes |
| Grade Code | PR1225 | Carbide substrate and coating specification |
| MPN | SGS74255 | Manufacturer Part Number |
| Shank Type | Cylindrical | Standard cylindrical shank (h6 tolerance) |
3. Engineering Dimensions & Geometry
| Parameter | Value | Tolerance | Standard |
|---|---|---|---|
| Nominal Diameter (D) | 6.35 mm | h6 | ISO 286-2 |
| Drill Length (L₂) | 19.0 mm | ±0.5 mm | ISO 5419 |
| Overall Length (L₁) | 31.8 mm | ±1.0 mm | ISO 5419 |
| Shank Diameter (d₁) | 6.35 mm | h6 | ISO 286-2 |
| Point Angle | 140° | ±2° | DIN 1412 |
| Helix Angle | 30° | ±1° | ISO 5419 |
| Number of Flutes | 6 | — | — |
| Corner Radius | 0.03 mm | ±0.01 mm | ISO 5419 |
| Surface Finish (Ra) | ≤0.4 μm | — | ISO 4287 |
| Runout (TIR) | ≤0.01 mm | — | ISO 4015 |
4. Grade Details — Key Grade Characteristics
The PR1225 grade is engineered specifically for steel machining operations, combining an advanced carbide substrate with a multi-layer coating system for maximum performance and tool life.
| Characteristic | Specification |
|---|---|
| Carbide Substrate | Fine grain carbide |
| Coating System | MEGACOAT (TiAlN + TiN) |
| Hardness | 91.8 HRA |
| Coating Color | Gold-Bronze |
| Max Operating Temperature | Up to 850°C |
| Fracture Toughness | Very High |
| Oxidation Resistance | Very Good |
5. Grade Comparison Matrix
| Grade | Best For | Hardness | Speed | Wear Resistance |
|---|---|---|---|---|
| PR1535 | Stainless, HRSA, Titanium | 92.5 HRA | Very High | Excellent |
| PR1225 | General Steel, Cast Iron | 91.8 HRA | High | Very Good |
| CA515 | Alloy, Hardened Steel | 91.2 HRA | Medium-High | Excellent |
6. Chipbreaker Profile
Profile Type: Medium edge preparation, universal chipbreaker for mixed materials and general steel
| Parameter | Value |
|---|---|
| Rake Angle (γ) | 8° – 12° |
| Clearance Angle (α) | 7° – 10° |
| Edge Preparation | 0.02 – 0.05 mm hone |
| Chip Groove Depth | 0.15 – 0.30 mm |
| Chip Form Target | 6-shaped / C-shaped (ideal for evacuation) |
7. Recommended Applications & Workpiece Materials
This 1/4 DRILL 6FL Drill is optimized for the following material groups and machining scenarios:
| Category | Details |
|---|---|
| Primary Materials | Carbon Steel, Alloy Steel, Tool Steel, Cast Iron |
| Hardness Range | Up to 40 HRC |
| Ideal Operations | Through-hole and blind-hole drilling, peck drilling, high-feed drilling |
| Industries | Aerospace, Automotive, Energy, General Manufacturing, Medical Devices |
8. Application Map by Operation
| Operation Type | Suitability | Notes |
|---|---|---|
| Through-Hole Drilling | ★★★★★ | Excellent chip evacuation with 6 flutes |
| Blind-Hole Drilling | ★★★★☆ | Use peck cycle for depths >3×D |
| High-Speed Drilling | ★★★★★ | Optimized for dry or MQL machining |
| Peck Drilling | ★★★★☆ | Recommended step: 0.5D – 1.0D per peck |
| Counterboring | ★★★☆☆ | Use reduced feed rate (50-60%) |
9. Recommended Cutting Conditions
| Parameter | Recommended Range | Optimal Value |
|---|---|---|
| Cutting Speed (Vc) | 80 - 180 m/min | 130 m/min |
| Feed per Revolution (f) | 0.10 - 0.30 mm/rev | 0.10 mm/rev |
| Depth of Cut (ap) | 1.0D - 3.0D | 2.0D |
| Coolant | Emulsion (5-8%) or MQL | High-pressure internal coolant preferred |
| Spindle Speed (n) | Calculated from Vc | n = (1000×Vc)/(π×D) |
10. Operating Guidelines
| # | Guideline |
|---|---|
| 1 | Ensure toolholder runout is <0.01 mm TIR for optimal performance and tool life. |
| 2 | Use high-pressure internal coolant (min. 70 bar) for deep-hole applications (>3×D). |
| 3 | Start with the lower end of the cutting speed range for new applications, then optimize upward. |
| 4 | Monitor chip formation; adjust feed rate if chips are too long or welded to the tool. |
| 5 | Always use a center drill or spotting drill to ensure accurate entry and prevent walk-off. |
| 6 | Inspect tool edges before each use; do not use chipped or worn tools. |
| 7 | Store in original packaging in a dry environment to prevent coating degradation. |
11. Toolholder Compatibility
| Holder Type | Compatible | Notes |
|---|---|---|
| Drill Chuck | Yes | Standard keyless or keyed chucks |
| Collet Chuck (ER) | Yes | ER11, ER16, ER20, ER25, ER32 depending on diameter |
| Hydraulic Chuck | Yes | Best for high-precision applications |
| Shrink Fit Holder | Yes | Recommended for high-speed machining |
| Specialized Holders | Yes | Standard Drill Chucks, Collet Chucks (ER16-ER32), Hydraulic Expansion Holders, Shrink Fit Holders |
12. Packaging & Ordering Information
| Item | Details |
|---|---|
| MPN | SGS74255 |
| Unit Price | $39.00 USD |
| Minimum Order | 1 unit |
| Packaging | Individual protective plastic tube with foam insert, labeled with MPN SGS74255, batch number, ISO designation, and manufacturing date. Bulk packaging available for quantities over 50 units with custom labeling. |
| Lead Time | In Stock — Ships within 24-48 hours |
| Warranty | Full manufacturer warranty against material and workmanship defects |
13. Catalog Meta Data
| Attribute | Value |
|---|---|
| Catalog Year | 2024 |
| Revision | Rev. 3.2 |
| Page Reference | Cat. Vol. 1, Page 816 |
| Manufacturer | Kyocera Corporation, Japan |
| Country of Origin | Japan |
| Certifications | ISO 9001, ISO 14001, DIN 6535, JIS B 4120 |
Product data compiled from official Kyocera technical documentation. Specifications subject to change without notice. For application support, contact our technical team.
✓ 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.
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国際スピード郵便
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✓ 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.
