the basic concept of the s12 with a distance between centres of 150 mm, a height of centres of 175 mm and a grinding wheel diameter of 500 mm has been targeted at precision without compromise. the heart of the machine is ......the basic concept of the s12 with a distance between centres of 150 mm, a height of centres of 175 mm and a grinding wheel diameter of 500 mm has been targeted at precision without compromise. the heart of the machine is a asked on high precision positionable linear motors completely new, patented drive/guide system b. the extremely rigid slides with hydrostatic bearings are magnetically pre-tensioned. the in-feed movement can be programmed in 10-nanometer steps.