FROM 8 BASIC MODELS, 14 DIFFERENT MACHINE TYPES 1.TWO models with grinding wheels 335-406 mm (14"-16") O.D. mounted on hydrodinamic spindle 2.THREE models with grinding wheels 508 mm (20") O.D. mounted on hydrodinamic spindle 3.FIVE Models with grinding wheels 610 mm (24") O.D. mounted on hydrodinamic spindle 4.TWO models with grinding wheels 610 mm (24") O.D. mounted on hydrostatic spindle 5.TWO models with grinding wheels 762 mm (30") O.D. mounted on hydrodinamic spindle