Retrac button bit - Chinese The most popular drill bits

(1)Thread: T38, T45, T5, T60;

(2) Type: drill bits;

(3) Bit diameter: 45mm-205mm;

(4) Head design: plane, concave heart, universal surface

(5) Base body design: common, easy to return, straight back

(6)Drill rod length: 600mm-8000mm;

(7)Package: in wooden box;

(8)Supply ability: 10000pcs/month;

(9)Delivery time: 7-10days;  

Button bits are our mainly manufacturing products, of which various sizes and styles are available and applicable for drilling different kinds of rock formations. Button Bit designs include; Standard, heavy duty, drop centre, ballistic, parabolic and retract and combination options. Available with all popular international thread forms such as T51,which can be equipped with rock drilling machines such as Atlas Copco, Boart Longyear, Sandvick, Ingersoll-Rand, Furukawa and so on.  

Extension rods are made by hollow drill steels; there are two shapes of extension rods, round type and hexagonal type. This hollow hole are usually named flushing hole, used for transmitting water or air during drilling，And the threads can be used for connecting couplings, shanks, couplings or bits.