On-Site Grinding of a Turbine Shaft – Hydroelectric Site

As part of a corrective maintenance operation, on-site grinding was carried out on two cylindrical bearing surfaces of a turbine shaft at a hydroelectric facility. These areas exhibited surface defects that were incompatible with reassembly requirements.

The intervention was performed directly on-site using an abrasive grinding system mounted on a custom support. This method allowed correction of surface irregularities without disassembling the shaft, maintaining its position and axis throughout the process.

Manual alignment using a dial gauge ensured precise positioning of the tool along the shaft axis, guaranteeing consistent and accurate rework. The abrasive process achieved the required surface finish while adhering to the specified dimensional and geometric tolerances.

The operation concluded with a dimensional inspection of the reworked areas, confirming that the shaft was compliant and ready for reuse.

This type of on-site grinding provides an efficient solution for restoring functional surfaces, minimizing downtime and avoiding heavy dismantling operations.