Located in Luoyang, China, Double Z Piling Machinery Co., Ltd, we are a manufacturer of rotary drilling rig for construction piling. We have worked out a multi functional rotary drilling rig that can be attached to the excavator, with functions both as excavator and as rotary drilling rig. We have built up our equipment from 7t to 30t which are mature both in technology and in production capacity. Now our equipment can drill max 50meters deep. And the max diameter 1.6 meters. it is no longer difficult to fill the blank for 80% of mechanized and efficient construction machinery of middle-sized and small-sized pile foundations. Now, the production technology of excavators of China has become quite mature, and the products have also formed a series from small to large, which means that in the multi function whirl-digging drill of middle size, we can also produce a series of equipment from small to large. At present, as a specialized manufacturer, we have built up our equipment from 7t to 30t which are mature both in technology and in production capacity. Moreover, in the past three years from research to launching into the market, the market tested and accepted the quality of our equipment and the quality of the drilling. Thus, it is no longer difficult to fill the blank for 80% of mechanized and efficient construction machinery of middle-sized and small-sized pile foundations. To know more details contact us today.