... Copco, Sandvik, Ingersoll-Rand etc. The equipments are widely used in earthwork projects, minerals exploiting, well-digging projects and foundation ... as electro-hydraulic forging hammer, seal chamber furnace lines, precision machine tools and so on. We adopt numerical control process to ... Thread Rod---R25,R28,R32,R38,T38,T45,T51. Integral Drill Rod---H19/H22, Diameter---20mm - 42mm. rock drill bits