grinding machines. five cnc axes, with anti-backlash ac direct drives driven by linear motors. these make this machine exceptionally fast, yet accurate. you get better grinding performance, better surface finish and greater precision. linear drive technology precision, with,broaching tool grinding machine broachline bg series,the bg signifies not only a machine concept but also a complete technology package consisting of machine and competence in tool manufacturing. the bg 1000 / 2000-t models are very compact traveling table machines for the grinding of broaches up to 200 mm diameter.