Gw Carbide-HSS Twist Drill Bit

Product Name: Gw Carbide-HSS Twist Drill Bit Model NO.: All sizes Usage: Wood Drilling, metal Drilling Material: Tungsten Carbide Type: Twist Drill Bit Length: Taper-length Standard: CQC&ISO Customized: Non-Customized Flute: 1-5 Quality: Top Quality in China 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 Length: 3xd,5xd,8xd,etc Package: 1PCS in a Plastic,10PCS in a Group Types: Without Coolant and with Double Coolant Trademark: GW Transport Package: Plastic Box, Standard Export Carton Specification: 33x29x19cm Origin: Zhuzhou HS Code: 8208101900 Product Description Raw micro grain material, high hardness and T.R.SCo: 10%,Wc:90%TRS: >3600 N/mm2HRA: 91.8-92.4, HRC:45-50/55-60/65/68Grain size: 0.4-0.6μmHelix angle: 117°,140°Diameter of cutting edge: 0.2-0.9mm; 1-20mmDiameter of rods: 4-20mm Length: 50-300mmCutting Form: Without Coolant and With Double CoolantFlutes No.: 1-5Application and usageSuitable to cut Copper, Cast Iron, Carbon steel, Tool steel, Mould steel, Stainless steel, Plastic, Arcylic, etc.CoatingBlack oxideis 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 powderis 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 nameCoatingsHardnessHVThicknessumFriction CoefficientOxidation TempColorAlTiN35002.5-30.3900BlackTiAlN28002.5-30.3900VioletTiSiN360030.451000CopperAlTiSiN40030.41200BlueTiN25002-30.5600GoldProduct Show:More information, please kindly contact us.Best regardsGrewin carbide