• Flute：1-6
• Quality：Top Quality in China
• Samples：for Free
• Chemical Composition：6%-12% Co-Wc
• HRC：45-55 55-65, etc
• Coating：CVD, PVD, Double Coating
• Certificates：ISO9001-2008, SGS
• Place of Origin：Zhuzhou-Carbide City
• Cutting Form：Flat, Ball Nose, Corner Radius, Roughing
• Package：10PCS Per Plastic Box
• Transport Package：Plastic Box, Standard Export Carton
• Specification：33x29x19cm
• Trademark：GW
• Origin：Zhuzhou
• HS Code：8208101900
• Production Capacity：6 Million PCS Annually

Basic Info.

Flute 1-6 Quality Top Quality in China Samples for Free Chemical Composition 6%-12% Co-Wc HRC 45-55 55-65, etc Coating CVD, PVD, Double Coating Certificates ISO9001-2008, SGS Place of Origin Zhuzhou-Carbide City Cutting Form Flat, Ball Nose, Corner Radius, Roughing Package 10PCS Per Plastic Box Transport Package Plastic Box, Standard Export Carton Specification 33x29x19cm Trademark GW Origin Zhuzhou HS Code 8208101900 Production Capacity 6 Million PCS Annually

Product Description

HSS M35 drill bit with high quality

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

Application and usage
Suitable to cut Copper, Cast Iron, Carbon steel, Tool steel, Mould steel, Stainless steel, Plastic, Arcylic, etc. 

Coating
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

Coatings	Hardness HV	Thickness um	Friction Coefficient	Oxidation Temp	Color
AlTiN	3500	2.5-3	0.3	900	Black
TiAlN	2800	2.5-3	0.3	900	Violet
TiSiN	3600	3	0.45	1000	Copper
AlTiSiN	400	3	0.4	1200	Blue
TiN	2500	2-3	0.5	600	Gold

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Grewin carbide