TML developed the new Unidachs 430RK for job sites where the available space, surrounding structures or dangerous conditions make work difficult with the ‘RK’ in the product name standing for ‘Remote’ and ‘Knickgelenk’ (articulated joint). All the machine's functions are remotely controlled, with the additional cradle mount for the telescopic boom making it possible to work over a particularly large working area even in a confined space.

This new degree of freedom makes the Unidachs 430RK, combined with the proven, 360° rotary telescopic arm, into a machine of universal application for the removal or application of material, or for machining surfaces. The attachments – for example, pneumatic or hydraulic hammers, ripper tips, rotary drum cutters as well as various types of excavator bucket – can be moved in up to five axes simultaneously. They can be used, for instance, in the roof and side wall areas, underneath the machine or in confined spaces, at almost any angle and from only one location. Typical applications are profiling tunnel cross sections, the excavation of caverns and galleries as well as the precise linear scaling of roofs and walls in mines and tunnels. The telescopic arm can also be fitted, for instance, with spray nozzles for liquid concrete as well as drilling attachments and tools for setting arches and anchors.

Thorsten Bolender, sales manager Tunnel & Mining at TML, states: “With the compact design and its unique kinematics, the new Unidachs 430RK makes it possible to work safely in places that standard hydraulic excavators cannot reach. The telescopic arm covers a vertical slewing range of +45° to -108°; with a telescopic stroke of 3,000mm the attachment reaches heights of more than 10m. At the same time, the telescopic arm provides a torque of 14.8kNm as well as a maximum breakout force of 73kN.”

The compact Unidachs 110

At bauma 2022, TML will exhibit the highly compact machine, Unidachs 110, which also has a 360° endlessly rotating boom arm. Application areas and configuration variants are similar to those of the Unidachs 430RK, however, the machine is significantly more compact. With its small dimensions – the chassis is only 1,315mm wide and 1,644mm high – it is suitable for work in particularly confined spaces. Nevertheless, the machine has a large working area with the boom having a reach of up to 5,000mm, depending on the length of the attachment. As such, the Unidachs can reach the complete profile of a service passage or tunnel from one location, meaning that all areas in which material can be removed, worked or applied can be reached.

Thorsten Bolender sees not only technical but also commercial advantages: “The Unidachs 110 is the only machine for mining and tunnelling available on the market that is extremely compact and at the same time offers all the advantages of the rotating boom arm. These features open up completely new optimisation potential in mining and tunnelling for our customers: they can now work cost effectively even in extremely confined spaces.”

The technology in detail

The mobile machines and scaling equipment in the Unidachs series cover a wide range of applications from the compact 3.2t Unidachs 110 to the 45t Unidachs 850. Like the Unidachs 110, all the other Unidachs models have a boom arm that can be endlessly rotated by 360° and also have the telescopic function of the boom. Four models are optionally available as a tracked crawler or wheeled crawler with all-wheel drive.

With comprehensive configuration packages, TML has adapted every Unidachs to project specific requirements, whether tunnelling, mining or demolition. Equipment includes electrical or diesel drive, FOPS protected upper cab, automatic central lubrication system, dust protection system, LED lighting packages, camera options from the reversing camera to a 270° bird view system, radio remote control, as well as numerous different attachments. The completely enclosed and shielded boom protects the telescopic cylinders and hydraulic hoses inside against the ingress of dust or rock and in this way ensures the highest possible reliability.

TML Technik at bauma 2022 will be located at Stand C5.324.