Various types of rotary drilling rig rotary drilling rig purchase conditions performance range is very large truck mounted rig model, for the construction of such pile diameter is very suitable. The principle of rotary drilling rig should be able to meet the needs of the user's current main project, taking into account engineering requirements that may occur in the future. In addition, Shandong truck mounted rig, rotary drilling rig performance parameters to leave room for development. Rotary drilling rig in accordance with its main operating parameters: can be divided into torque, engine power, hole diameter, depth and drilling rig machine quality for the purchase of three types: (1) Small rotary drilling rig. Small rotary drilling rig applications: various gallery of piling, pile floor section bearing structure, a variety of urban renewal projects of less than 1m municipal pile for pile for other purposes. Small rotary drilling rig Technical parameters: torque 100kN2m, engine power 170kW, hole diameter 0.5-1m, drilling depth of about 40m, 40t quality about the whole rig. (2) mid-sized rotary drilling rig. Medium rotary drilling rig applications: bridge piles of various highways, railways and other transport facilities bridges, large buildings, ports pile load-bearing structure, urban viaduct bridge piles, other applicable piles. Medium rotary drilling rig Technical parameters: torque 180kN2m, engine power 200kW, hole diameter 0.8-1.8m, drilling depth of about 60m, 65t quality about the whole rig. (3) large rotary drilling rig. Large rotary drilling rig applications: all kinds of highway, railway bridges Bridge pile, the special structure of other large buildings bearing foundation piles. End surface design in the form of DTH DTH drill bit is an important part submersible drilling rig, the end face of the design in the form of high pressure DTH drill bit used, there are four: the end face of the convex type, planar end face, face concave and the end furrow center type. 1, the end face of the convex type: This drill two forms, single and double boss bosses face, which is mainly used for large diameter DTH Bits. Convex end surface drill DTH drilling in hard and hard to maintain when abrasive rock drilling higher rate, but the flatness of drilling is poor, does not apply to blasthole drilling require a higher flatness project. 2, the end face of the flat-type: This form relatively rugged drill for drilling hard and very hard rock truck mounted rig, blast hole drilling but also for less demanding flatness of hard rock and soft rock. 3, face concave: this shape drill head has a conical end face of the concave portion is formed in the drilling process, the drill slightly to keep the drill bit nucleation of performance, blast hole drilling has a good straight line degree, the effect of this drill line up pink truck mounted rig, drilling speed, is currently on the market use more DTH Bits. 4, the end face of the center furrow: This drill shape is evolved from the same type of ball tooth bit to the end face of the central portion of the drill bit has a deep concave central portion. For drilling during nucleation, ensure flatness when drilling deep boreholes, only applies to drilling in soft rock and hard rock. Shandong truck mounted rig | Long industry machinery (certified) | Car rig by Dragon Machinery Co., Ltd. Shandong. Machinery Co., Ltd. Shandong Long (www.longyejixie.com) is Tai'an, engineering machinery parts leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lung industry machinery leadership with the staff warmly welcome all inquiries negotiations to create the dragon industry machinery better future.