Twist drill drill drill rod suitable for use coal, coal mining is an indispensable tool than ideal. Hole diameter 55-110 (mm) Dimensions 1000-2000 (mm) of coal and rock twist drill rod, rock twist solid and hollow rods are divided into two kinds, in the production process, the material using a special drill pipe handling technical way to improve the toughness and drill pipe strength, hardness and wear resistance, extended service life, is the ordinary coal drill 3-5 times. Coal and rock twist drill rod Category: Φ26, Φ27, Φ28, Φ30 Features: 1, light weight (45% lighter than the old drill pipe). 2, footage fast, small dust, without leaving a vertical hole drilling cuttings into the hole clear. 3, easy snap beans connection, saving strapping material. 4, the rod fell down and drilling tail separation can be used to extend the service life. 5, through good water when wet work. 2. Mine drilling drilling accessories: (1) B19, B22 drill, bolt, coal drill pipe, drill pipe hexagonal hollow bolt grouting, etc. (2) diamond drill bits, carbide drill bits, , PDC drill bits, core bits, air drill, drill connected sets, drill the end (3) bolt tray, air leg, manual cable cutter, manual cable tensioning equipment, tensioning jack, anchor stirrer, anchor Cable blender, bolt tension meter, cable anchor, anchor mining, water filter, oiler, injection valve. (4) Wind shovel series:, C2, C5, C6, C7.