When you need to fasten the screw to the wood or metal workpiece without showing its head, you should use a counter sink drill bit. <\/p>\n\n\n\n
Normally, counter sink drill bits are two different sizes. The jobber-length counter sink drill bits are used for woodworking, and stub-length drill bits are used for metalworking. So many types of counter-sink drill bits with different geometries are available in the market.<\/p>\n\n\n\n
Counter sink drill bit is used for woodworking and metalworking to chamfer the drilled hole’s open edge. Counter sink drill bits are made with high-speed steel and coated with TiN, TiAlN and TiCN to improve durability and heat resistance. Normally counter sink drill bit has an 82 degrees angle that helps to chamfer the open edge of the drilled hole according to the exact angle of the screw head.<\/strong><\/p>\n\n\n\n Wood counter drill bits are two parts, such as countersink head and spiral flute, and metal counter sink drill bits have only counter sink heads only. So let’s see all in detail about counter sink drill bits and usage.<\/p>\n\n\n\n