Having used extensively PILGRIM’S radial fitted bolt on turbine couplings they invited PILGRIM to design a hydraulically actuated tool that could replace the conventional solid plugs
Based upon PILGRIM’S Radially Fitted bolt technology the centre plug is hydraulically drawn into the matching sleeve. The resulting force in the sleeve causing its expansion creates a powerful and controlled radial force achieving a true interference fit within the rotor shaft and therefore accurately centring of the generator rotor in the lathe. Removal is also simple by using oil injection at the mating interface between the sleeve and the centre plug. Once separated the sleeve reduces in diameter to a clearance fit.