GRM 35/21 model is manufactured with high tensile steel frames ready to be mounted to any crane having a minimum 50 ton capacity and a 10 ton minimum single line pull.
123 kW water cooled diesel engine is installed and coupled with mechanical torque converter to develop 21000 kgm torque.
The unit can drill piles from 550 up to 2500 mm diameter. Its rotary table is supplied with a two crowd cylinder kelly system developing 156 kN friction pull-down force.
GRM 35/21 is supplied with a mechanical wire remote control board to be installed inside the operator's cabin of the base crane for easy operations. Control gauges, fuel and oil level indicators, rpm counter are assembled in a check panel applied to the upper frame of the rig, located in a favorable position to the operator.
The equipment can be also supplied with optional higher frame to elevate the piling equipment above casing pipes.
|Drilling depth max||M||85|
|Diesel engine||type||Cummins QSB 4.5|
|Torque converter||type||CRT 3531-3 TC 370|
|Gears – front/reverse||nos.||3 + 3|
|DIMENSIONS AND WEIGHTS|
|TELESCOPIC KELLY BARS*|
|Standard friction kelly bar||type||4 x 12 m (kg 4650)|
|Long friction kelly bar||type||4 x 17 m (kg 6390)|
|BASE CRANE REQUIREMENTS|
|Base crane min. capacity||ton||50|
|Crane winch capacity min.||ton||10|