It was widely used in big steel mill for delivering liquid steel specially from blast furnace. A blast furnace tap hole drill is provided having an elongated feedshell which....
( 1) Diameter: 38mm-70mm. ( 2) shape; carbide 3-blade type , steel cross bit , carbide cross bit , button bit andetc ( 3) Package: in wood case or in carton ( 4) Productivity: ....