From the brand name to the dictionary
The history of the angle grinder begins in 1954, when the company Ackermann + Schmitt (now FLEX) launches the first high-speed angle grinder with the type designation DL 9, thereby making industrial history.
The foundation for "the Flex" had already been laid in 1922, when the company's most important invention, the "flexible shaft", an intermediate piece between the motor drive and the tool, gave rise to the FLEX brand.
Due to the success of the DL 9 and the following angle grinders, the brand name "FLEX" is used by users for the angle grinder and the derived verb flexen for cut-off grinding. In 2006, "flexen" was finally included in the German dictionary "Duden".