Alignment of bearing journals in relation to stern tube.
Alignment of bearing journals in relation to the stern tube (or gearbox) is carried out using the Easy-Laser E950 bore alignment equipment. As the measurement is performed in the centre of the bearing, the instruments are suitable for both small and large shaft diameters. The measurement method is based on a laser transmitter being mounted on the axial surface at one end of the stern tube (or on the gearbox flange or in the final support bearing) and the detector unit being placed in the bearing journal. Measurement values are recorded for each bearing journal, the measurement program calculates and then displays the position in the vertical and horizontal directions. As adjustment is performed on land or in the dock, compensation values can be entered if required in order to correspond with the position of the bearings when the vessel is in the water. If necessary, the roundness of the bearing can also be checked.
The E950 system is also used for measurement of diesel engines, for example check the straightness of the crankshaft and camshaft bearing centre lines. Other application examples are propeller pods, water jet installations and rudder alignment.
Easy-Laser E950 measures at distances of up to 40 meters. Resolution is 0.001 mm. Both bearing halves and complete bearings can be measured, and the bearing journals can have different diameters. The system is suitable for use both in production and out in the field. Wireless units make it easy to move around the measurement objects also in confined spaces.