> Berthiez

Starrag S.A.S from Saint-Ètienne (France) has made a very good name for itself throughout the energy industry worldwide with its large vertical Berthiez turning and grinding machines, because grinding takes on an important task in the manufacture of drive elements. Therefore, the new factory in Huai’an received four vertical grinding machines (RVU) from the Berthiez product range. The advantage of these machines is their high-precision grinding in the μm range, which always takes place with extremely high repeat accuracy. NGC uses the grinding quartet primarily for finishing planetary gear bores. Both, integrated roller bearings and the increasingly used plain bearings make high demands here. The high required surface quality of the bearing raceway can only be achieved by grinding the hardened surface. The four turning and grinding machines have 25 kW and 35 kW motorised grinding spindles, turning tool holders for Capto C6 tools and measuring probes for workpiece measurement. The machine concept is rounded off by adjustable dressers, tool magazines (4 places for grinding wheels and 8 places for turning tools) for automatic changing of grinding wheels and turning tools.