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hrc65 internal cooling drill bit

SAMHO HRC65 Internal Coolant Drill Bits – Precision Drilling in Hardened Steel

Stop struggling with heat buildup in hardened materials. The SAMHO SHD Series is specifically engineered to drill through materials up to HRC65. Featuring advanced internal cooling channels and a high-precision 140° split point, these solid carbide drills ensure exceptional center positioning and rapid chip evacuation for your most demanding CNC projects.

Hardness Range: Master hardened steels from HRC46 to HRC68.

Internal Cooling: Direct-to-tip coolant flow for deep-hole stability and longer tool life.

High-Accuracy Point: 140° geometry reduces tool walking and axial thrust.

Manufacturing: 5-axis CNC ground for perfect concentricity and repeatability.

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When working with heat-treated mold steels and alloy steels, heat and friction are the enemies of precision. SAMHO’s Internal Coolant Drill Series is designed to tackle high-hardness steels (up to HRC65) by delivering cutting fluid exactly where it’s needed most: the cutting edge.

Advanced Technical Features

  • Optimized for Extreme Hardness (HRC46–68)
    Manufactured from premium ultra-fine grain solid carbide, these drills combine extreme surface hardness with superior fracture resistance. They maintain sharp cutting edges even under the intense mechanical loads of drilling hardened tool steels and alloy steels post-heat treatment.
  • Internal Coolant Technology for Deep Holes (3D / 5D)
    By delivering cutting fluid directly through the drill body to the tip:
    • Minimized Heat Buildup: Extends tool life significantly
    • Optimized Chip Evacuation: Reduces the risk of tool breakage due to chip clogging
    • Stable Performance: Consistent results in both dry and MQL (Minimum Quantity Lubrication) environments
  • 140° Split Point Design
    The specially engineered point angle provides:
    • Superior Self-Centering: Eliminates the need for center drilling in many applications
    • Low Cutting Resistance: Reduces axial thrust on your CNC spindle
    • Minimal Tool Walking: Ensures tight-tolerance hole placement even on complex surfaces
  • Precision 5-Axis CNC Grinding
    Every SAMHO drill bit is produced using high-precision 5-axis grinding technology, ensuring perfect concentricity and edge sharpness for consistent hole diameters and superior surface finish in high-volume production

Versatile Tooling Options

  • Internal Coolant Version: Best for deep holes and high-speed production
  • Solid Drill Option: Cost-effective alternative for versatile cooling strategies or shallow hole applications
  • Catalogs Available: Specialized 3D and 5D catalogs to find the perfect length-to-diameter ratio for your project

Professional Application Industries

  • Mold & Die: Drilling ejector pin holes and water lines in hardened mold bases
  • Aerospace: Precision holes in high-strength alloy components
  • Automotive: Machining of hardened engine and transmission parts

Why Partner with SAMHO for Wholesale?

  • Direct Wholesale Pricing: Maximize your margins with factory-direct deals
  • Proven Reliability: Capable of drilling HRC62+ hardened materials with ease
  • OEM Customization: Tailored diameters, flute lengths, and coating options for your unique requirements
Model Number Diameter of Drill Length of Drill Shank Diameter Overall Length Type In Stock
HRC65 Super Hard Drill Bits(Internal Cooling)3.3 3.3 20 6 62 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)3.4 3.4 20 6 62 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)3.5 3.5 20 6 62 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)3.6 3.6 20 6 62 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)3.7 3.7 20 6 62 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)3.8 3.8 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)3.9 3.9 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4 4 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.1 4.1 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.2 4.2 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.3 4.3 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.4 4.4 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.5 4.5 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.6 4.6 24 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.7 4.7 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.8 4.8 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)4.9 4.9 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5 5 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.1 5.1 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.2 5.2 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.3 5.3 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.4 5.4 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.5 5.5 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.6 5.6 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.7 5.7 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.8 5.8 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)5.9 5.9 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6 6 28 6 66 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.1 6.1 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.2 6.2 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.3 6.3 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.4 6.4 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.5 6.5 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.6 6.6 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.7 6.7 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.8 6.8 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)6.9 6.9 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7 7 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.1 7.1 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.2 7.2 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.3 7.3 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.4 7.4 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.1 7.5 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.6 7.6 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.7 7.7 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.8 7.8 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)7.9 7.9 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8 8 34 8 79 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.1 8.1 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.2 8.2 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.3 8.3 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.4 8.4 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.5 8.5 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.6 8.6 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.7 8.7 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.8 8.8 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)8.9 8.9 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9 9 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.1 9.1 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.2 9.2 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.3 9.3 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.4 9.4 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.5 9.5 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.6 9.6 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.7 9.7 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.8 9.8 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)9.9 9.9 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10 10 47 10 89 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.1 10.1 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.2 10.2 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.3 10.3 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.4 10.4 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.5 10.5 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.6 10.6 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.7 10.7 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.8 10.8 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)10.9 10.9 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11 11 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.1 11.1 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.2 11.2 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.3 11.3 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.4 11.4 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.5 11.5 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.6 11.6 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.7 11.7 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.8 11.8 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)11.9 11.9 55 12 102 Central water outlet ○
HRC65 Super Hard Drill Bits(Internal Cooling)12 12 55 12 102 Central water outlet ○
Download 1: hrc65 internal cooling drill bit File
Download 2: hrc65 internal cooling drill bit File

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