Low torque
High torque
Maximum torque
56kN-m [5.7 ton-m]
105kN-m[10.7 ton-m]
Bucket speed
20 rpm
10rpm
Two speed torque system allows the machine to perform an efficient drilling work
into various stratum conditions.
3) Hydraulic cylinder supported type kelly drive
A stable positioning of the kelly drive by a hydraulic cylinder eliminates swaying of
the kelly bar and gives a high degree of vertical drilling accuracy compared to the
conventional rope-suspension type machines.
4) Robust suspension rope of 28mm in diameter plus large braking capacity
Adaptation of φ
φ
φ
φ 28mm suspension rope for the kelly bar prolongs the life time of
the suspension rope and minimizes rope maintenance work.
A large brake drum provided with cooling fins is suitable for a heavy duty drilling
work.
5) High power diesel engine of 184kW [250 PS]
A powerful diesel engine allows the machine to maneuver simultaneous
operations and assures it to operate efficiently.
6) Long thrusting stroke of 1000mm
7) Low winch speed control
Winch rope line speed can be controlled at the desired speed of 100% to 17% of
its rating.
8) Easy maintenance
Adopting floating ring seals in drive tumblers, take-up tumblers and lower track
rollers, and sealed bearings to every sheaves require minimum daily maintenance
service. A grease-bath type swing pinion gear prolongs its service interval.
9) Low fuel consumption
The machine is powered by a direct fuel injection type diesel engine with a pair of
variable displacement type plunger pumps of efficient performance, accordingly
economical operation can be assured.
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