FIELD: processes for grinding crank shafts fixed in the same position. SUBSTANCE: apparatus includes headstock and tailstock having supports, respectively, arranged along axis of crank shaft for basing limit points of shaft. Headstock and tailstock are provided with resting centers for fixing shaft due to applying to it axial tension free of axial compression efforts. Apparatus provides different variants of units for clamping crank shaft, all satisfying with above mentioned condition. EFFECT: enhanced quality and efficiency of grinding process due to elimination of elastic deformation of shaft and necessity for refixing it. 12 cl, 6 dwg
