Tungsten carbide drill bits used for rock drilling are primarily made from a combination of tungsten carbide and cobalt. This alloy is known for its exceptional hardness, wear resistance, and toughness, making it suitable for drilling through hard rock formations. Here are some common grades and the...

Cross drill bits belong to wind drills, because the blade is designed to be cross shaped and named cross drill bits. Cross drill bits are mainly used for drilling blast holes, such as rock holes, coal holes, and concrete ymjt02 soil holes. Cross drill bits are used in conjunction with B22, B25 air d