Demag has introduced a new four-axle all-terrain crane (ATC), the AC 80-4, which is its latest offering in the 100t lift capacity segment. The new model has a 60m long main boom, which can be configured for even longer reaches, making it possible to have the longest main boom reach not only in its own class but also in the class of up to 120t ATCs.
The new AC 80-4 is an improvement on Demag’s older AC80-2 twin axle model, and Michael Klein, product marketing manager in charge of the new model explains: ”Demag already had an 80t crane, the AC 80-2. The worldwide success this model had, showed that there’s significant interest in a crane with this kind of lifting capacity. In fact, a large number of customers kept confirming this time and time again. That’s why we decided to add the AC 80-4 to our product portfolio in the segment of up to 100t.”
According to Demag, in the class of up to 100t, no other crane comes close to the lifting capacity of the AC 80‑4 with a fully-extended boom up to a radius of 30m, with which the AC 80‑4 can lift an impressive 5.4t at a radius of 14m. It also raises the bar with its main boom extended to 50m, lifting 9.7t att a radius of 10m at that boom height, which is 2.2t more than the next most powerful competitor. In terms of line pull, the Demag AC 80-offers 66.9kN, or 6.8t, claimed as unmatched in its class by Demag.
The the main boom length of 60m can be expanded with a 6.5m main boom extension that can be offset by 25° and 50°. Its capacity is a generous 23.8t, meaning that it can be used to lift heavy loads over obstacles. Since the extension can be folded and carried on the main boom, it can be ready for use quickly. In addition, there is a 1.50m runner with a capacity of 26.6t available for the Demag AC 80-4. These together make the AC 80-4 also recommended for indoor projects. The main boom can be lowered up to 3° below its horizontal position so that potential work at height can be easily eliminated and the jibs can be installed quickly and safely.
In termsof design the new AC 80-4 offers dimensions nearly all of which are shorter than those of other four-axle units in its class, says Demag. Its total length is 12.15m, the carrier length is 10.60m, its height does not exceed 3.85m and the front overhang is a modest 1.49m.
“Together with its width of only 2.55m, our AC 80-4 is better suited for tight work sites than any other crane in its class,” Klein says, adding that this was another crucial design aim behind the new Demag development.
The AC 80-4 has a sophisticated counterweight design, which makes it possible to have a maximum counterweight of 17.7t . On the road, it can transport up to 9.3t of this counterweight itself while remaining under a 12t-axle load limit, and all while also carrying the 6.5m swing-away jib. This configuration even includes a three-sheave hook block on board.
“With this equipment, the AC 80-4 can take care of a broad range of lifts by itself without requiring the use of expensive escort vehicles,” Klein points out. Even when staying under an axle load limit of 10t, it can carry 3.3t of counterweight. This means that it can cross bridges with a weight limit of 10t without a problem and avoid time-consuming detours in many cases.
The AC 80-4 is equipped with a Mercedes-Benz diesel engine that puts out a maximum of 340kW of power and delivers a maximum torque of 2,200Nm. A Mercedes-Benz G230-12 transmission, together with a drivetrain from the same manufacturer, is in charge of transmitting the engine’s power to the road. With twelve forward speeds and two reverse speeds, all-wheel steering as standard, and two or three driven axles, this makes the AC 80-4 suitable for both rough terrains at work sites and fast travel on highways and long-distance drives.
