GPS-18 Reverse Circulation Drilling Rigs ● It is mechanically driven, hydraulically operated, easy handling, maintenance, and of dependable quality. ● There are six speed choices of the turntable to meet excavating requests in different layers, which promotes the drilling speed ● A shift lever is mounted to the turntable to gear the drilling bars, which is easy handling, safe, and considerate manual power saving. ● The turntable and the hydraulic device together work to move the drilling tools of large diameters (≤1.8m) away from the piling. ● Hoisting and downing of the drilling mast is driven safely and fast by the hydraulic cylinders. ● Guidance slot mounted to the taller boring tower to guarantee the verticality of the piling, and reduce the possibility of oversize of the taller boring; a device mounted for removing the drilling pile away from the taller boring. ● The pulley block move transversally by force of the cylinder, the winches leveled directly to the piling. Self-service operation of the drilling mast during the hoisting and downing of the drilling tools. ● Easy handling and reliable operation of the winches with epicyclic gear system. ● A round drilling bar (L=3500mm) to shorten the ancillary working hours. ● Reverse cycling sand pumps mounted to meet different layers, and adaptable to normal cycling when needed. Applicable to air-lifting reverse drilling tools and can drill deep hole. Specifications Rated diameter of hole m 1.8 Drilling depth m 120 Rated torque of rotary table kNm 26 Speed of rotary table rpm 14,19,24,33,44,60 Drilling tools Ф180 x 12 (standard) Ф168 x 11, Ф180 x 16 (option) Main winch lifting force (single line) kN 30 Auxiliary winch lifting force (single line) kN 25 Rated load of drilling mast kN 180 Height of drilling mast m 9 Power kw 37 Overall dimension (L x W x H) m 10.03 x 2.2 x 2.5 Weight of the whole machine(standard) t 12 Weight of base machine t 8