Classification Of Drill Material

  • Selection criteria for drill bit material:

    Drilling operation is essentially a kind of cutting process. The prerequisite for completing the cutting process is that the hardness of the tool material must be higher than the hardness of the material being processed.

     

    Material category of drill bit:

    The material of the drill bit is generally divided into HSS, HSS containing cobalt, powdered HSS, tungsten steel drill bit. The hardness of the above drill bit materials is gradually increased. Under normal circumstances, the hardness of the drill bit can be determined by whether the drill can drill the movable workpiece or the wear resistance. And the hardness of the workpiece is converted into HV Webster hardness, if the hardness of the drill bit is more than 3 times the hardness of the workpiece, of course, the surface hardness of the drill bit is greater than the surface hardness of the workpiece, the higher the hardness, the longer the life of the drill bit.

     

    Drill bit material selection:

    Drill holes in wooden materials and use woodworking drills. Woodworking drills have a large sales volume and do not require high tool hardness. The tool material is generally high-speed steel (HSS).

    Drill holes in general metal materials (alloy steel, non-alloy steel, cast iron, cast steel, non-ferrous metals), and use metalworking drill bits. The material of the drill bit is generally high-speed steel (high-grade tools containing elemental cobalt HSS-Co).

    To drill holes in concrete materials and stone materials, use percussion drills to match masonry bits. The material of the cutter head is generally cemented carbide.

    Use ceramic tile drills to drill holes on ceramic tiles and glass with higher hardness. The tool material is tungsten carbon alloy. Because the tool has high hardness and poor toughness, it is necessary to pay attention to low speed and no impact.

    For more drill bit varieties, please see:HSS Cobalt Drill Bit