J D NEUHAUS introduced new models to its EH range of air-operated monorail hoists. Resulting from a program of continuing product development, these powerful units are reliable for heavy-duty lifting in harsh operating conditions, including manufacturing, onshore and offshore handing, shipbuilding, etc.
Two versions are available, for 75- and 100-metric ton lifting capacity, in both double trolley and four trolley traverse-drive versions. All these models use a new air motor unit that provides a 9-kW power output at 6-bar air pressure supply. This motor incorporates proven technology for the lift/drive and integrated braking operations, based upon a stepped brake piston and self-lubricating rotor unit.
These redesigned four-trolley drive version hoists are designated as EH 75 and EH 100, offering 75 or 100 metric tons lift capacities respectively. The new twin-trolley drive versions, which offer more compact units for operation where limited space is available, are designated as EH 75C and EH 100C.
JDN design features and advantages are incorporated throughout the range, which include reductions in overall size as well as up to 50% energy savings from reduced air consumption. Significant weight reductions for the four-trolley hoist units have been achieved too —550 lbs for the EH 75 and 1.320 lbs for the EH 100.
The twin trolley compact EH 75C and EH 100C models each offer a further weight reduction of 770 lbs over the four-trolley counterpart.
Faster load lift/lower times (up to 50%) are available now, with a general decrease in the overall dimensions. A proactive gearbox cooling system has been incorporated, using the expanding exhaust air from the drive motor, while noise levels during operation have also been reduced.
Other new developments include pin valves used as hoist limiters for top and lower hook position, with parallel chain sprocket arrangements also now incorporated.
These new products supplement an existing EH range of monorail hoists with lift capacities of 10, 16, 20, 25, 30, 37, 40, 50 and 60 metric tons, with all products designed and engineered for extremes of performance, with operation in even the harshest of environments.