The Evolution of Wrenching
27.5.08
ROBEL’s 30.82 RKS Universal Power Wrench offers endurance, precision and ergonomics
ROBEL Bahnbaumaschinen GmbH introduced the "30.82 RKS" universal power wrench in early June 2008. During the development, the manufacturer paid particular attention to endurance, precision and ergonomics. "RKS" is short for "ROBEL Clutch System" as an important component of the machine is an electrically operated and electronically monitored multiple disk clutch. In addition, the operation and appearance of the machine have also been revised.
New clutch concept
The eponymous ROBEL Clutch System is a multiple disk clutch that is electrically operated and electronically monitored. This enables very precise torque transfers. The clutch of the "RKS" increases wrenching precision and reduces wear at the same time. This affects the transferable torques and guarantees precise coupling, resulting in a high endurance and consequently less maintenance. In addition, the characteristics of the multiple disk clutch allow for a comfortable wrenching process for the operator.
Potentiometer and torque display
A compact display and operating element has been integrated into the covering of the machine. The central panel includes an electronic torque display and a dial for torque pre-selection. Both have been clearly laid out to ensure unambiguousness during work site operation. They are easily recognisable at a glance. The torque is pre-selected with a potentiometer dial that can be easily operated with work gloves. Once the articulated socket has been placed on the rail fastening, the wrenching operation is carried out at the push of a button on the right handle bar.
The range of adjustment at 200 rpm of the wrenching spindle ranges from 150 to 350 Nm and to 999Nm at 70 min-1. As soon as the pre-selected value is reached, the display lights up in confirmation and the wrenching process is automatically completed. This means that the pre-selected torque is consistently reliable and to a large extent independent of the operator. The period of contact of the clutch is automatically limited to a minimum, which has a positive effect on the running of the machine and its wear.The working hours are logged electronically and may be shown in the display after entering the applicable code. The number of engine starts as well as the number of loosening and tightening operations can also be shown.
Modified appearance
ROBEL optimised the machine in co-operation with an industrial designer. The goals were a tightened assembly process, improvements in ergonomics and materials usage as well an increased overall suitability for operation at the work site.
For example, not only the integrated central control panel but also other elements such as the cable routing are protected by a covering. Another example is the integration of an LED lighting into the gear housing for illuminating the work area.
Other improvements
Other modifications with an eye on the practical usage of the 30.82 RKS universal power wrench are the hydraulic pipes that are no longer used and the handles that have been integrated into the protective frame. The very low centre of gravity enables an operation without an outrigger. When the machine is not used and during transport the outrigger is placed in an equally simple and well thought-out support on the machine and is thus always readily available. The revolving behaviour of the articulated sockets during the wrenching process - particularly in the case of slanted rail fastenings - leads to an optimised wrenching behaviour regarding the wear of materials.
