ZJF55S bolting rig is equipped with standard 4 cylinder 60 KW Yuchai engine + 55 KW electric motor, dual power pack. 76 mm standard with optional spiral type drill pipes, for casing drilling，and the diesel engine & electric motor power selected at will.

Large torque dual motor rotary head, greatly increasing the rig torque （ 4,600 N.m ），for larger hole drilling，widely used in foundation bolting, case drilling, & large hole spiral drill pipe drilling （optional maximum torque 5,600 Nm）.

Standard rotation dual-speed valve, convenient, for the special job of different torque & speed.

Standard plunge piston tramming motor for more powerful climbing with better quality.

I:  Standard plunger piston tramming motor, with better climbility & quality.

II:  Large torque dual motor rotary head with high / low speed for larger hole bolting, case drilling & DTH drilling.

III:  Standard rotation dual-speed valve for convenient operation and special working of different torque & speed needs.

IV:  Standard dual-power model, convenient selection between diesel engine & electric power.