HRC65 8D Internal Coolant Solid Carbide Drill Bit – 7.0–8.9mm carbide end milll
Price shown is a starting point. Contact us for a precise quote based on your requirements.
BEYOND HRC65 8D Internal Coolant Solid Carbide Drill Bit (7.0–8.9mm)
Brand: BEYOND
Hardness: HRC65
Design: 8D long-length with internal coolant holes
Shank Type: Straight shank
Material: Ultra-fine grain carbide
Product Description
The BEYOND HRC65 8D internal coolant solid carbide drill bit (7.0–8.9mm) is engineered for high-speed, deep-hole drilling in hardened materials up to HRC65. It offers excellent chip evacuation through dual internal coolant channels, ensuring consistent accuracy and extended tool life in CNC machining applications.
- 8D (8× diameter) long-length design for deep-hole drilling
- High hardness up to HRC65 – perfect for hardened steel, die steel, and tool steel
- Internal coolant channels improve chip evacuation and cooling efficiency
- Optimized flute geometry for stable drilling and precision hole finish
- Suitable for high-speed CNC machines and automated production lines
Applications
Ideal for drilling:
- Hardened steels (up to 65HRC)
- Alloy steels and stainless steels
- Tool steels and die steels
- Precision mold and automotive parts
Available Sizes (7.0–8.9mm)
| Diameter (mm) | Flute Length (mm) | Total Length (mm) | Shank Diameter (mm) |
|---|---|---|---|
| 7.0 | 66 | 106 | 8 |
| 7.1 | 76 | 116 | 8 |
| 7.2 | 76 | 116 | 8 |
| 7.3 | 76 | 116 | 8 |
| 7.4 | 76 | 116 | 8 |
| 7.5 | 76 | 116 | 8 |
| 7.6 | 76 | 116 | 8 |
| 7.7 | 76 | 116 | 8 |
| 7.8 | 76 | 116 | 8 |
| 7.9 | 76 | 116 | 8 |
| 8.0 | 76 | 116 | 8 |
| 8.1 | 95 | 139 | 10 |
| 8.2 | 95 | 139 | 10 |
| 8.3 | 95 | 139 | 10 |
| 8.4 | 95 | 139 | 10 |
| 8.5 | 95 | 139 | 10 |
| 8.6 | 95 | 139 | 10 |
| 8.7 | 95 | 139 | 10 |
| 8.8 | 95 | 139 | 10 |
| 8.9 | 95 | 139 | 10 |
Why Choose BEYOND Carbide Drills?
- High-precision CNC manufacturing
- Strict quality control and testing
- Professional solutions for metal cutting
- Custom sizes and coatings available upon request
Keywords: HRC65 carbide drill, 8D internal coolant drill, deep hole drilling carbide bit, long length solid carbide drill, hardened steel drill bit, CNC carbide drill BEYOND.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.