Wolff 7021 redesigned and market-ready

Zug, Switzerland-headquartered tower crane manufacturer Wolffkran’s has launched the Wolff 7021 Clear. The crane was first seen in prototype form at Bauma 2022 (where it was called the Wolff 7021 FX).

Since the initial prototype, the crane has been redesigned in response to talks with customers and operators. As a result the crane now offers improved assembly and accessibility, claims Wolffkran. The ballast frame and hoist winch can now be assembled/disassembled on the crane itself rather than the ground, as previously seen on the prototype. This has been made possible due to the use of a quick connection between the ballast frame and counterjib. This means Wolffkran has been able to reduce the assembly weight of the counter jib, too.

Jib parts can now be transported on the counter jib, while the counter jib railings do not need to be removed during transportation. This saves space and facilitates greater ease of transport. The crane can be transported in three trucks.

According to Wolffkran, the Wolff 7021 Clear’s jib is easy to assemble and maintain, too. This is, in part, due to the upper and lower boom connection, that was introduced on the Wolff 6523 Clear. This system, Wollfkran says, also provides smooth transitions ensuring more fluid movement of the trolley for fine positioning of the load.

The Wolff 7021 Clear is a double-reeve crane and two versions are currently available:  the 7021.8 – with a lifting capacity of 8.5 tonnes; and the 7021.10 – with a lifting capacity of 10.5 tonnes. A 12.5 tonne version is currently being planned. The crane has a tip load capacity of 2.1 tonnes (2.3 tonnes with Wolff Boost) at 70 metres of jib. The jib can be extended between 25 and 70 metres in 2.5-metre increments.

Depending on the version, the Wolff 7021 Clear is available with 45 kW (8.5 and 10.5 tonnes) or  67-kW hoisting gear (12.5 tonnes) as well as with two slewing gear units, capable of operating speed of 94 metres per minute.