Roljack is a world-leader in the field of Crushing - Screening solution, Stone Engineering Solution, Construction Solution, Fabrication industries etc. With our unique knowledge and innovative solutions, we help our customers improve their operational efficiency, reduce risks and increase profitability. Roljack employs over 700 people in house & more than 20 Dealers abroad.
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A #derrick #crane is a lifting device usually composed of mast ( frame or tower ) and lifting arm. There are three or four lines connecting the mast to the lifting arm, which control it goes up and down. To lift a load, a separate line runs under the lifting arm with a hook as the hoisting mechanism. Derrick cranes are docking facilities mounted on vessels or dockside. Features 1. There are 4 driving system for hoisting mechanism, 2 driving system for luffing mechanism. 2. The entire #derrick #crane chassis adopt basin support on concrete platform, which can effectively ease the crane horizontal and vertical deformation. 3. Multi-layer winding line reel drum. Hoisting drum wrapped with 4 layers of wire rope, and luffing drum is wrapped with 5 layers of wire rope. 4. Complete frequency, lifting half load speed is 2 times of the full load speed. 5. Using inverter, encoder and a series of electronic control system to ensure the 4 lifting motors keep synchronous running. #cranes #derrickcrane #udaipur #india #mqportalcrane #cranehook #craneequipment #mechanicalengineering #mechanical
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