In the paper, grinding process control problems that occur during the marine diesel engine crankshaft production are addressed. The large size crankshafts have a length of up to 12 m and weigh up to 25 tons, but the final grinding allowance for the diameter is ca. 0.3-0.4 mm. To achieve this, very high accuracy of the mechanical parts of the grinding machine is necessary. The study focused on the measurement of parameters such as level, linearity, parallelism, runout and coaxiality of the respective mechanical parts of the grinding machine. Based on the results, some recommendations were made on the inspection procedure in order to ensure a consisted quality of the produced crankshafts. The obtained roughness parameters after grinding were found highly
satisfactory, allowing effective polishing afterwards.
