Due to its impressive performance and an extremely compact design, the WOLFF 166 B has quickly developed into a bestselling crane for reinforced concrete structure projects on space restricted inner-city job sites since its launch in 2012. Unlike conventional luffing jib cranes with a winch driven luffing gear, it is fitted with a compact hydraulic luffing mechanism which eliminates the classical tower top and reeving of the luffing rope, making both transportation and assembly more efficient. The hydraulic luffing design also allows for a smaller out-of-service jib position, which is particularly important on constricted city construction sites.
The WOLFF 166 B US offers a maximum load capacity of 26,460 lbs (12,000 kg) in 2-fall operation and 13,230 lbs (6,000 kg) in 1-fall operation. The jib line-up ranges from 82 ft (25 m) to 180 ft (55 m) and can be extended in 16.4 ft (5 m) increments. With a 164 ft (50 m) jib it achieves a best-in-class tip load capacity of 7,270 lbs (3,350 kg).
Equipped with a powerful 60 kW hoist winch the WOLFF 166 B US offers a hook path of 1,640 ft (500 m) and line speeds of up to 377 ft/min (174 m/min) in 1-fall operation and can be built up to a free-standing tower height of 306 ft (93,2 m) due to the modular WOLFF tower system.
The hydraulic luffing cylinder with load sensing control automatically regulates the luffing speed according to the load, which results in a remarkable luffing movement from maximum to minimum jib radius in only 90 seconds with an economical 22 kW motor. The on-site connected power requirements sit at a low 91 kVA with 480 V.
Both the hydraulic cylinder and the hydraulic unit are installed in the connecting block as a compact unit. Due to this design, the hydraulic lines do not need to be disconnected for transport and assembly, saving time and cost for erection and installation. The connecting block can either be lifted onto the tower alone or as a pre-assembled unit together with the slewing frame and lower section of the tower top. The hoist winch of the WOLFF 166 B US is conveniently positioned on the jib allowing safe pre-reeving of the hoist rope on the ground prior to installation and offering easy access in case of scheduled maintenance.
The WOLFF 166 B US is fitted with the latest WOLFF CAB crane cabin providing optimal visibility and overview, a fully adjustable seat and ergonomically designed control panels providing a comfortable place of work for the operator. The cabin platform with the cabin and switch cabinet comes pre-assembled as a single unit ex-works and can be attached to the crane in just one step.
Further standard features facilitating safer and more efficient operation include the remote data transmission system WOLFF Link, an anti-collision interface for all major anti-collision systems, a working range limitation, electrical central lubrication of the slewing ring, a temperature-controlled switch cabinet with heating and ventilation, and a slip ring system in the lower part of the tower top for an optimal signal transmission.
The WOLFF 166 B US will be showcased on a WOLFF City Portal (CP 690) that adapts a standard WOLFF Cross Frame (KR 12-60) by means of adding support legs into a convenient solution allowing traffic to flow underneath the crane. WOLFFKRAN will be exhibiting in Booth F5832 on the Festival Grounds at Conexpo 2020.