Koerber schleifring gmbh offers the studer s151 `internal grinding machine, which can also be used as a universal unit. It is available as a 1 spindle, 2-spindl e or 4-spindle machine. The s151 can handle the largest work pieces of all the studer internal grinding machines. The working area of the machine is large yet the overall dimensions remain compact. With this machine, numerous clamping parts can be processed. The high displacement times allow short down times and high productivity.