"Even just owing to its proximity to us, Bauma in Munich is naturally always a very special highlight for us," said Dr Ruediger Kaub, chairman of the Management Board of Bauer Maschinen. "The trade show is the perfect platform for us to present the technological innovations of our equipment and process engineering to a very large, international expert audience." Christian Gress, head of sales, added: "The extremely good customer response to all our business divisions and the excellent feedback of the visitors to our booth emphasise the importance and success of the Bauma for us. All in all, it was once again an all-round success."

The core area of the exhibits at the booth, which covered an area of 2,750m², was again made up of drilling rigs, as has become traditional. Bauer presented its new platform for small rotary drilling rigs optimised especially for Kelly drilling. In 2018, Bauer launched the completely new BG 15 H that makes a clear statement in terms of functionality while offering all the benefits for handling the challenges of small construction sites. With this new generation of rigs, Bauer continues to rely on 186kW Caterpillar diesel engines for strong performance and low fuel consumption. At Bauma, the BG 15 H was presented for the first time with a crowd cylinder.

This drilling rig is now supplemented by the BG 20 H, another new rig with a torque of 200kNm. Both BGs are based on the same BT 50 base machine, which Bauer has completely redeveloped. Another common feature, in addition to its transportation width of just 2.5m, is the integrated service platform, which has now been introduced for the first time in the segment for compact drilling rigs. The platform allows easy access to all maintenance and service points in the upper carriage and, at the same time, meets the highest standards in terms of occupational safety. In addition, both drilling rigs operate with a minimum of noise and feature extremely low fuel consumption.

At Bauma 2019, Bauer also presented a further core range of machines for specialist foundation engineering with three PremiumLine large rotary drilling rigs. The BG 23 H, BG 33 and BG 45 demonstrated the multifunctional character of this rig series.

Equipped with various attachments and tools, they demonstrated a small selection of possible applications for PremiumLine rigs - all of the machines were equipped with Bauer's award-winning energy efficient power technology EEP.

The BG 23 H and BG 33 were showcased on the latest generation of BT 65 and BT 85 base machines with significant safety innovations. They now also have an integrated service platform for easy, convenient and secure access for maintenance work. The practical service platform can be pulled out like a drawer, so the motor panelling automatically serves as fall protection. The BG 45, a tried-and-tested and powerful PremiumLine machine from the upper-level V-series, was shown at Bauma with an improved drilling system to create deep full displacement piles with the LostBit method.

Going electric

Environmental sustainability is becoming more and more important on specialist foundation engineering construction sites. Especially in urban environments, contractors are already having to comply with strict regulations with regard to exhaust and noise emissions as well as vibration-free operations. In a wider context, the ecological footprint of construction sites is becoming an important factor that also has a direct economic impact. For this reason, Bauer took an important step in the direction of practical implementation and presented an electrically driven cutter based on a Bauer MC 96 duty-cycle crane for the first time at Bauma 2019. The 500kW electric drive has many advantages compared to diesel drives that can be successfully implemented, especially in relatively stationary specialist foundation engineering applications, such as trench cutting. The powerful electric drive is fully integrated into the MC and ensures high system availability. It is designed to adapt to different voltage levels and environmental conditions at the job site.

The practicality of the system in inner-city areas was a high priority. For this reason, a patented solution for the external secondary drive of the system was developed as a useful feature during assembly and disassembly, for example. It ensures fast and easy manoeuvring even on cramped construction sites and works independently of the power supply. Even in the event of a power failure, emergency operation of all required loads in the cutter carrier can be easily ensured.

RTG Rammtechnik

RTG Rammtechnik - a member of the Bauer Maschinen Group for over 20 years - also showcased two of its rigs at Bauma: an RG 27 S, equipped for the CSM method, and an RG 19 T, with its SilentVibro MR 150 AVM sound-insulated vibrator. The latter was equipped for installing sheet pile walls. Between these two machines, a DKS 50/100 rotary head from Eurodrill for constructing secant pile walls was on display.

Also on display were remote controls, a multifunctional auxiliary winch and the operator's cab equipped with B-Drive. The showcased hammer HRS 6, a representative of the latest generation of hammers, was also quickly attached to RTG equipment using a patented system.

Bauer Mat Slurry Handling Systems unveiled the new CMS-45 container mixing plant at Bauma. The system is unique because the mixer, water tank, agitator container and the control cabinet are permanently installed in a 20ft container frame and connected to flexible lines. This makes the system compact, space-saving and easy to move, thereby reducing the time needed for assembly and disassembly. The centrepiece of the system is a 1.8m³ colloidal mixer with an off-centre mixing tool and an external circulation line that ensures optimum dispersion of the slurry while simultaneously increasing the mixing capacity. A 15in touch screen allows the operator to enter up to ten different formulas with ten sequences each and display the current batch data at any time.

KLEMM Bohrtechnik

The focus of the exhibits By Bauer subsidiary KLEMM Bohrtechnik this year was innovations in the field of kinematics, the machine control unit and on the topics of energy efficiency and functional safety.

The KR 806-3GS drilling rig was presented it to a professional audience for the first time. The new product defines the highest standards in terms of versatility, productivity, reliability, efficiency, ergonomics and safety. Compared with the previous model, the kinematics, among other aspects, were redesigned from the ground up. Stiffness and fatigue strength were increased significantly. The system kinematics are primarily designed for drilling at flat angles with extremely low starting points. On the other hand, pile borings with drilling position beside the chassis can now also be executed. The drill rig is ideally designed for power-intensive double-head systems, hydraulic hammers and rotary drives.

The drive train is based on a 160kW diesel engine featuring SCR-only emission technology for emissions levels 4 (EU) or 4final (EPA). A 175kW version compliant with emissions standard 5 (EU) will be available from autumn 2019.

Among other components, the hydraulic system includes a dual-circuit load-sensing system with load limit control and power sharing. The hydraulic mobile valve banks are integrated directly into the CAN-BUS system. They respond with a high level of sensitivity and are self-regulating, making them temperature-independent and highly precise. The EEP efficiency package includes a power and energy management system that automatically adjusts the speed highly dynamically to the respective load and operating status. Fuel consumption and noise emissions are considerably reduced. As standard, all functions can be remotely controlled via radio. The machine controller's functional safety complies with Performance Level C (ISO 13849), making its design very resistant to faults and fail-safe. Display and diagnostics functions have been significantly expanded. For example, the control panel display shows the status of the flow control valve opening for the individual flushing channels, i.e. air and water.

Another Klemm exhibit was the completely redesigned, electric drive KR 704-2E rig. It now offers the best conditions for use, for example in confined spaces and cellars, where a diesel engine is unsuitable because it would generate exhaust emissions. With a minimal base carrier width of 750mm and the option of using a telescopic drill mast, the drill rig can be manoeuvred into rooms with narrow doorways and low ceilings. Specialist foundation engineering tasks, particularly micropiles for foundations and the underpinning of existing foundations using high-pressure injection columns, can be performed under difficult conditions. Especially under these conditions, the (radio) remote controllability of the drill rig offers many advantages. All functions - driving, setting up and drilling - can be performed by remote control.

This year Klemm also exhibited the HBR 120 rod manipulator. At the Bauma 2016 trade fair, the system was awarded the Eurotest Prize from BG Bau, because it combines innovative technology with a high degree of occupational safety. Essential aspects of the HBR 120, 122 and 124 series have been further developed to allow for uncomplicated adaptation of the mechanical hydraulic components and their control on different base machines (mini-excavators).