In 2021, the company took delivery of a larger Dörries CONTUMAT VC 6300/500 MC F So, which has also proven to be an instrumental addition.

Dipl.-Ing. Hubert Erz, Senior Consultant Sales Renewables at Starrag: “Despite a fundamental satisfaction with the familiar machine concept, the experts in Lippstadt understand that new technological challenges require modifications.” The plant in Lippstadt therefore ordered the machine with some important new technical details that Starrag has improved.

For example, the portal of the machine is designed to be larger than is currently required. The newly installed base supports a base table which holds a magnetic chuck with a diameter of 197 in. (5,000 mm). The base table can, however, be extended to 236 in. (6,000 mm) by means of ring segments, which allows it to support a larger magnetic chuck. “The machine can be adjusted in size,” explains Erz. “It therefore fits in with the current trend towards ever larger wind turbines and thus larger anti-friction bearings.” For future machines, there is even conversations of an extension to 276 in. (7,000 mm).

Although the basic machine configuration corresponds to the predecessor model, the supports have been completely revised at the customer’s request. Starrag installed a new grinding support on the left with a centrally positioned motorized grinding spindle. Instead of a separate motorized drilling spindle, the turning/ drilling support on the right-hand side was fitted with an integrated drilling spindle with HSK 100-A tool holder, which sits between the two turning tool holders from Kennametal. Customer advisor Erz: “We have designed the tool holder of the right-hand support in such a way that the modular size KM63 turning tools and the rotating HSK 100 tools can be picked up directly from a pick-up magazine, meaning an additional drilling unit is no longer required.”