20.12.2012

Sany's 500 tonne crawler

Sany America has released more details of its new 500 tonne SCC8500 crawler launched at the recent Bauma China exhibitiion.

The SCC8500 fills the gap between the 400 and 600 tonne models and is aimed at a variety of infrastructure projects as well as wind and power generation.
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Sany America has released more details of its new 550 US ton crawler seen at Bauma China.

“Customers told us the 500 tonne machine is badly needed to fill a niche between existing machine sizes,” said John Lanning, global director of research and development for Sany crawler cranes. “The 400 tonne class machines are too small to handle bigger nacelles in wind construction, and the 600 tonne cranes require a back mast and luffing jib to make these lifts. The SCC8500 is the perfect solution.”

The SCC8500 is especially well-suited for construction of 100 metre wind towers and placing 2.5 MW nacelles. Sany says the SCC8500 can do these lifts with a straight boom and an offset wind tip, without the need for a back mast. The crane has a full complement of attachments and options including fixed jib, luffing jib and the Sany UltraLift package.
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The crane uses the Porsche Design Studio Sany UltraCab.

“The SCC8500 has lighter overall weight, transports like a 400 tonne machine and can be quickly assembled and mobilised on the job site,” adds Lanning. “These features, along with the lift of a 500 tonne machine put the SCC8500 in a class by itself.”

There are 10 main boom, fixed jib and luffing jib configurations. Maximum main boom length is 108 metres on the basic machine and 121.1 metres with the UltraLift configuration. The fixed jib has a maximum length of 42 metres in both basic and UltraLift configurations. The maximum luffing jib length is 72 metres extending to 84 metres with UltraLift.
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Sany’s load moment indicator automatically detects lifting capacity, boom angle, top height and radius.

The Sany ACE (auto counterbalance equalisation) System senses the boom angle and uses hydraulic cylinders to automatically adjust the position of the movable superstructure counterweight. The standard ACE System has one superstructure tray with hanging brackets and 20 upper ballast blocks giving 217,000 kg of counterweight.

The ACE System design avoids the need for a carbody counterweight and keeps overall crane weight down. The base machine transports on 21 trucks, the same as a standard 400 tonne crane and with the ACE System, the SCC8500 doesn’t need a counterweight wagon, making it more mobile on the job site.

The optional UltraLift package includes a second counterweight tray with hanging brackets and 36 upper ballast blocks giving 394,000 kg of counterweight. A second pair of hydraulic cylinders extends the counterweight beam to 16 metres. The counterweight beam is supported by a back mast in the UltraLift configuration.
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The UltraCab tilts up 20 degrees for optimum visibility.

“The beauty of this design is you get more than 500 tonne performance in a machine that transports as easily as a 400 tonne crane,” said Lanning. “Contractors will value the quick set up and mobilisation of the SANY SCC8500.”

The crane uses the Porsche Design Studio Sany UltraCab air-conditioning and heating is powered by an auxiliary diesel generator. The UltraCab tilts up 20 degrees and a large, high-resolution display monitors statistics in real time.

A CCTV system gives the operator views of all winches, the counterweight and job site surroundings. An anemometer on the boom tip monitors wind speed and transmits the data to the in-cab monitor. An electronic level indicator displays data on crane inclination and ground pressure can also be displayed.

Maximum line speed is 173 metres a minute. The swing system uses dual drives and planetary gear reduction to automatically center the load and precisely regulate slew speed up to 1.8 rpm.