• Friends Engineering Works

Derrick Crane for Handling Blocks at Quarry

Friends Engineering Works is one of the pioneers and leading manufacturers in the field of manufacturing state-of-the-art machines, used in marble quarrying, processing and finishing activities. The Derrick Crane for Handling Blocks at Quarry is a heavy-duty crane that facilitates handling of marble blocks. It is a rational structure – the boom, central mast and rafters are made out of heavy-duty structural steel frame work duly stress relieved. The base of central mast is fixed to the hoist unit which in turn rotates on specially designed thrust bearing anchored to the central foot by means of bolts grouted in concrete foundation or rock. The hoist unit comprises of special crane duty motor connected to variable speed reducers and helical gearbox duly coupled to a grooved steel drum. Hydro-thruster brakes are used to control the smooth lifting of weight. The hoist unit rotates on specially designed thrust bearing by means of multiple step down gears built into the hoist foot. The hook block is equipped with a forged steel forked revolving hook. Wire rope is of 6 x 37 construction. Electric operations are controlled with push button control unit independent from the position of hoist unit. Limit switches for rotation, boom lowering and lifting and load lowering and lifting are provided to ensure accident free operations. These cranes are available in various models.