Kyocera SGS621 7.5mm SGS62145 Drill 2FL - CNC Precision Drilling
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- Stock: In Stock
- Model: DRILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGS62145
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Product Overview
The Kyocera SGS621 7.5mm Solid Carbide Drill (SGS62145) is a premium two-flute drilling solution engineered for high-precision CNC machining operations. Manufactured in Japan from sub-micron grain carbide with tisin coating for heavy-duty drilling and extended tool life, this drill delivers exceptional dimensional accuracy, superior surface finish, and extended tool life in demanding production environments.
Designed specifically for heavy-duty drilling, structural steel, deep hole applications, general manufacturing, the 7.5mm diameter drill features optimized geometry that minimizes cutting forces, reduces heat generation, and ensures reliable chip evacuation even in deep-hole applications. The TiSiN PVD Coating provides excellent wear resistance and thermal stability, making it suitable for dry machining, MQL (Minimum Quantity Lubrication), and wet cutting conditions.
ISO Designation Breakdown
| Designation Element | Value | Description |
|---|---|---|
| ISO Standard | DIN 6537 | Solid carbide twist drill standard |
| Product Code | SGS62145 | Kyocera SGS621 series catalog number |
| Diameter (Dc) | 7.5 mm | Cutting diameter with h5 tolerance |
| Flute Length (Lf) | 50.7 mm | Effective drilling depth capacity |
| Overall Length (L) | 100 mm | Total tool length for standard reach |
| Shank Diameter (D) | 8.0 mm | Cylindrical shank (h6 tolerance) |
| ISO Symbol | D7.5×50.7×100 | Complete dimensional designation |
Engineering Dimensions & Geometry
| Parameter | Specification | Engineering Note |
|---|---|---|
| Cutting Diameter (Dc) | 7.5 mm | Ground to h5 tolerance for precision hole quality |
| Overall Length (L) | 100 mm | Standard length for general machining |
| Flute Length (Lf) | 50.7 mm | L/D ratio of approximately 6.8:1 |
| Shank Diameter (D) | 8.0 mm | Cylindrical shank compatible with standard collets and hydraulic chucks |
| Neck Diameter | 6.98 mm | Reduced neck for clearance in deep cavities |
| Point Angle | 140° | Standard point angle for universal material compatibility |
| Helix Angle | 30° | Optimized for chip evacuation and cutting force balance |
| Runout Tolerance | ≤ 0.010mm | Ensures concentric hole quality and extended tool life |
| Corner Radius | 0.03 mm | Micro-corner radius for edge strength and burr reduction |
Grade Details – Key Grade Characteristics
Grade Designation: PR1210
| Characteristic | Specification |
|---|---|
| Substrate | Sub-micron grain carbide with TiSiN coating for heavy-duty drilling and extended tool life |
| Coating | TiSiN PVD Coating |
| Hardness (HV) | 1,650 HV |
| Transverse Rupture Strength | 4,200 MPa |
| Coating Hardness | 3,200 HV |
| Coating Thickness | 2.5 ± 0.5 μm |
| Friction Coefficient | 0.35 (against steel) |
| Max Operating Temperature | 900°C |
Grade Comparison Matrix
| Grade | Coating | Best For | Speed Capability | Wear Resistance |
|---|---|---|---|---|
| PR1725 | AlCrN | General engineering, high-speed | ★★★★☆ | ★★★★★ |
| PR1210 | TiSiN | Heavy-duty, hardened steel | ★★★★★ | ★★★★☆ |
| PR1225 | TiAlN-Si | Extreme heavy-duty, high temp | ★★★★☆ | ★★★★★ |
| PR1210 (This Tool) | TiSiN | Heavy-duty structural drilling | ★★★★★ | ★★★★☆ |
Chipbreaker Profile
Aggressive S-curve chipbreaker with 0.20mm land width for high-volume chip removal in deep-hole drilling
| Feature | Value |
|---|---|
| Chipbreaker Type | S-Curve Precision Ground |
| Land Width | 0.20 mm |
| Rake Angle | 8° |
| Relief Angle | 12° |
| Chip Curl Radius | 4.0 mm |
Recommended Applications & Workpiece Materials
This 7.5mm drill is ideally suited for:
- Precision through-hole and blind-hole drilling in Carbon steel, alloy steel, hardened steel up to 45 HRC, stainless steel, cast iron, aluminum, non-ferrous metals
- High-volume production drilling with consistent hole quality
- CNC machining centers and Swiss-type lathes
- Applications requiring excellent surface finish (Ra ≤ 0.4 μm)
- Drilling operations in heavy-duty drilling, structural steel, deep hole applications, general manufacturing
Application Map by Operation
| Operation Type | Suitability | Max Depth | Notes |
|---|---|---|---|
| Through-Hole Drilling | ★★★★★ Excellent | 3×D | Optimal chip evacuation; minimal burr formation |
| Blind-Hole Drilling | ★★★★☆ Very Good | 2.5×D | Use peck cycle for depths > 2×D |
| Stack Drilling | ★★★☆☆ Good | 2×D | Ensure proper clamping and alignment |
| Cross-Hole Drilling | ★★★☆☆ Good | 1.5×D | Reduce feed by 30% at intersection |
| Trepanning / Core Drilling | ★★☆☆☆ Fair | 1×D | Not recommended; use dedicated core drill |
Recommended Cutting Conditions
| Workpiece Material | Cutting Speed Vc (m/min) | Feed f (mm/rev) | RPM (approx.) |
|---|---|---|---|
| Carbon Steel (C45) | 55-75 | 0.10-0.18 | 2,200-3,000 |
| Stainless Steel (304) | 30-45 | 0.08-0.12 | 1,200-1,800 |
| Aluminum Alloy (6061) | 100-150 | 0.18-0.30 | 4,000-6,000 |
| Titanium Alloy (Ti6Al4V) | 20-30 | 0.03-0.05 | 800-1,200 |
| Cast Iron (GG25) | 60-80 | 0.10-0.15 | 2,400-3,200 |
Note: Values are starting recommendations. Optimize based on machine rigidity, workpiece setup, and coolant conditions. Reduce speeds by 20% for dry machining or MQL applications.
Operating Guidelines
- Tool Runout: Maintain spindle runout ≤ 0.01 mm at the tool tip. Excessive runout will cause premature corner wear and hole oversize.
- Coolant: Internal coolant (min. 1.5MPa) strongly recommended for optimal performance and tool life
- Peck Cycle: For blind holes deeper than 2×D, use a peck depth of 1×D with full retract to break chips. For depths > 3×D, reduce peck depth to 0.5×D.
- Entry Angle: When drilling inclined surfaces or curved features, use a spot drill or center drill to create a 90° entry surface. Minimum spot diameter should be 1.5×D.
- Feed Rate: Maintain consistent feed. Avoid dwell at the bottom of blind holes to prevent work-hardening and tool damage.
- Retract Speed: Use rapid retract (G00) for chip breaking. Ensure coolant flow continues during retract to flush chips from the hole.
- Tool Life Monitoring: Monitor hole diameter and surface finish. Replace tool when hole tolerance exceeds specification or burr height increases significantly.
Toolholder Compatibility
| Holder Type | Compatibility | Recommended For |
|---|---|---|
| ER Collet Chuck (ER20/ER25) | ★★★★★ Excellent | General purpose; ensure collet size matches shank diameter exactly |
| Hydraulic Chuck (Hydro) | ★★★★★ Excellent | High-precision applications; best runout control |
| Shrink Fit Holder | ★★★★☆ Very Good | High-speed machining; excellent torque transmission |
| Milling Chuck (Power Chuck) | ★★★★☆ Very Good | Heavy-duty drilling; high clamping force |
| Weldon Holder | ★★★☆☆ Good | Acceptable for larger diameter drills; ensure proper side-lock engagement |
Packaging & Ordering Information
| Item | Details |
|---|---|
| MPN / Catalog Number | SGS62145 |
| Packaging Unit | 1 piece per plastic tube with protective caps |
| Minimum Order Quantity | 1 piece |
| Bulk Packaging | 25 pieces per master carton (contact sales for bulk pricing) |
| Warranty | Full manufacturer warranty against material and manufacturing defects |
| Storage | Store in original packaging at 15-25°C, humidity <60% RH |
| Shelf Life | 24 months from date of manufacture when stored properly |
Catalog Meta Data
| Attribute | Value |
|---|---|
| Product Family | SGS621 Series Solid Carbide Drills |
| Product Line | Kyocera Precision Drilling Tools |
| Tool Category | Solid Carbide Twist Drill (2-Flute) |
| Industry Standards | DIN 6537, ISO 5419 |
| Country of Manufacture | Japan |
| Harmonized Code | 8207.50.00 |
| Last Catalog Update | June 2026 |
| Replacement For | Direct replacement for standard DIN 6537 drills; no adapter required |
Disclaimer: All technical data and recommendations are provided as general guidelines. Actual performance depends on machine condition, workpiece material, setup rigidity, and coolant application. Always perform test cuts and verify dimensions before production runs. Kyocera and SGS621 are trademarks of Kyocera Corporation. Kyotow.com is an authorized distributor of genuine Kyocera industrial cutting tools.
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
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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
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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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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。
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Procured straight from Japan's local wholesale networks to capture maximum market arbitrage.
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