Internal Coolant Drills

Product name: 5xd Internal Coolant Tungsten Carbide Drill Bits

Model NO.: D19*135

Material: Tungsten Carbide

Certification: ISO 9001:2008, ISO 9001:2000

Length: Taper-Length

Usage: Wood Drilling, Metal Drilling

Standard: CQC&ISO

Certificates:ISO9001-2008, SGS

Cutting Form: Flat, Ball Nose, Corner Radius, Roughing

Samples: for Free

Chemical Composition:6%-12% Co-Wc

Flute:1-6

HRC:45-55 55-65, etc

Coating: CVD, PVD, Double Coating

Specification:33*29*19cm

5xd Internal Coolant Tungsten Carbide Drill Bits for Cast Iron Machining
Raw micro grain material, high hardness and T.R.S
Co: 10%,Wc:90%
TRS: >3600 N/mm2
HRA: 91.8-92.4, HRC:45-50/55-60/65/68
Grain size: 0.4-0.6μm
Helix angle: 30°-45 °
Diameter of cutting edge: 0.2-0.9mm; 1-20mm
Diameter of rods: 4-20mm
Length: 50-100mm
Cutting Form: Flat, Square, Ball nose, Ball, Corner Radius, Taper Flute, etc.
Flutes No.: 1-7

Suitable to cut Copper, Cast Iron, carbon steel, Tool steel, Mould steel, Stainless steel, Plastic, Arcylic, etc.

Black oxide is an inexpensive black coating. A black oxide coating provides heat resistance and lubricity, as well as corrosion resistance. Coating increases the life of high-speed steel bits.
Titanium nitride (TiN) is a very hard ceramic material that can be used to coat a high-speed steel bit (usually a twist bit), extending the cutting life by three or more times. However, when the bit is sharpened the new edge will not have the benefits of the coating.
Titanium aluminum nitride (TiAlN) is a similar coating that can extend tool life five or more times.
Titanium carbon nitride (TiCN) is another coating also superior to TiN.
Diamond powder is used as an abrasive, most often for cutting tile, stone, and other very hard materials. Large amounts of heat are generated by friction, and diamond coated bits often have to be water cooled to prevent damage to the bit or the workpiece.
Zirconium Gewin has been used as a drill bit coating for some tools under the Craftsman brand name

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