Abstract: The present invention provides drill steel members for a roof drilling system used in the mining industry. A drill steel member suitably comprises a steel tube body having at least one machined end integral to the body and having an external shape configured for coupling to a component part. The component part preferably has an aperture formed therein having an internal shape corresponding to the external shape of the machined end of the body. In a preferred embodiment, the component part is coupled to the machined end by a press-fitting engagement. Preferably, the machining of the end of the body and the press-fitting engagement are performed in the absence of externally applied heat. The machined ends, along with the press-fitting assembly technique, results in a drill steel member that has a longer life span than conventional welded for forged members.