Driving machine for drilling sections and tunnels - works according to back cut principle and has telescopic guides on rotating drill head for telescope arms fitted with cutting rollers

摘要

The telescopic guides (16), running parallel to each other, are arranged off centre on both sides of the rotary axis of the drill head (6). The telescope arms (15), on their parts carrying the cutting rollers (14) located outside the telescopic guides, are angled in the direction of the rotary axis and the face breast (13). The telescopic guides are arranged in a common cross plane of the drill head and are formed as telescope tube guides. ADVANTAGE - Is compact and simplified with the widening work being able to be effected at a tight distance behind the pre-borer.