A method and a system for establishing and executing correct automatic relubrication for a number of bearings incorporated in a grease lubrication system. The system determines initial values for the relubrication interval tf and/or lubricant volume utilizing data collected from the different bearing assemblies during operation. The data includes bearing load, bearing temperature and bearing rotational speed. A processor calculates a correct lubricant volume and a value for current lubrication interval tf by comparing an initial value with a current value. The calculated correct lubricant volume and current lubrication interval tf are supplying to an automatic lubricating apparatus, which functions in accordance with the determined values. The data collection and calculation procedures are repeated after each application of lubricant to the bearings.