All spindles are fitted with high precision ball bearings. The number, the size and the location of the bearings as well as the strength of the inner spindle are selected to provide the optimum rigidity. The wall thicknesses of the spindle housings are over-dimensioned and together with high rigidity have a noise and vibration damping effect. The grease lubricated ball bearing sections are in addition protected by seals at either side. Belt Driven Spindle provides unparalleled smooth running. Suitable for Double Column Grinding Machines use.