Ball-bearing depth stop for FAMAG Forstner bits and Bormax® with replaceable guide bushes, the depth stop is mounted on the drill neck and the drilling depth is adjusted, making it possible to drill blind holes with exactly the same drilling depth every time, the ball bearing of the stop cage means that there are no marks on the workpiece to be machined, for greater drilling depths it is possible to mount the guide bush upside down to achieve a greater adjustment range of the depth stop