The concept of button bits

The concept of button bits

Button bits are manufactured by embedding carbide buttons on bit bodies. Compared with insert bits, the arrangement of buttons of the button bits are freer, the quantity and the positions of gauge and front buttons can be reasonably determined according to hole diameters and rock conditions, and the diameters of the button bits are not limited. Because of breaking rock from multiple points, the button bits have advantages of high breaking efficiency, effective elimination of blind areas and repeated breakage prevention. In addition, because the abrasion strength of buttons is higher than that of inserts, button bits have longer one-pass life and small regrinding workload, which show higher values under the condition of mechanized drill rigs in long hole drilling. According to the connection with drill rods, button bits can be divided into three categories of tapered bits, threaded bits and DTH bits.