Maschinenfabrik ALFING KESSLER GmbH

Ensuring that the oil channel intersections are burr-free with the use of an endoscope


Each individual crankshaft system is perfected at the finishing stage. Here, the oil channels and the oil channel intersections must be rounded and polished, and the running surfaces of the main bearing journal and the big end bearing journal must be sanded. Electromagnetic tests for potential cracks are performed as part of a non-destructive process. Not all processing steps can be performed using machines. The manual work steps are performed by specialist employees with many years of practical experience. In the subsequent final inspection, the crankshafts are subjected to a complete check. The crankshafts are then washed in washing systems in which some of the work steps are fully automated and subjected to a further visual check. They are then preserved and packaged. This last step is performed in air-conditioned clean rooms in order to eliminate even the smallest residual dirt particles. Leading classification organisations have authorised us to perform certification in their name – the best possible proof of quality and reliability.

System-related crankshaft parameters are subjected to precise inspection. 3D measurement sensors record all form and position tolerances.

In the case of crankshafts of approx. 5 m or more in length, the high-precision sanding of the running surfaces and radii is primarily performed manually and requires a great deal of experience.

Touching is performed in order to visualise the contact pattern and the contact ratio of the bearing journal surface.

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