MZ7665 rock drill 
 Two-stage air-leg rock drill 7665 pairs of air-leg rock drill stage 7665 rock drill rock drill 7665MZ 
 7665MZ tunnel drilling machine to adapt to different heights can be used for soft and hard types of rock drilling different size aperture. Not only drilling bolt holes, but also face hole drilling, but also the beginning of mixing and resin bolt installation. Both for the rock tunnel, and standards for mining tunnel. Its multi-functional characteristics of rock drilling machine at home and abroad there is no comparable class, unique. 
 With B22mm × 108mm with a small drill rod, but also for the use of B19mm × 108mm with a small drill rod left a room, making Little Rock hole drilling  φ27mm possible. 
 7665 technical performance specifications sheet rock drill 
 Rock Drill 
 Model rotation Bore mm Stroke mm Weight kg Frequency Hz shock impact energy J Air consumption L / S Cylinder diameter mm pipe diameter mm drill sleeve mm 7665M tail reversal 25.5 76 70 ≥ 34 ≥ 62 ≤ 56 25 13 (B19 × 108) B22 × 108 
 7665MZ Forward 25.5 76 70 ≥ 34 ≥ 62 ≤ 56 25 13 (B19 × 108) B22 × 108