Hydraulic top head, Double top-drive head A. B. Holder and unscrew device. Depth 60~100M, Dia 110~200MM

Main hydraulic components made in USA,  Depth 100m when 110mm dia, depth 80m when 200mm dia

long-distance operate, hydraulic control the feeding and lifting, compressor drive the drilling

mechanical transmission, hydraulic feed and drilling angle range (one plane): 180° for electric motor...

Is mainly used in treating the disaster of landslide,rockslide so on, also used in rock anchoring, anchoring bar etc