Aggregates for lubricating consist of low pressure gear pump, flange and electric motor. The drive shaft of the pump and the shaft of the motors are connected via a flexible coupling. The pumps are structurally resolved in such way to enable smooth operation of the lubrication systems both with very dense hypoid oils and with the hydrolysis and light circulation oils. They are very resistant to the presence of metal particles produced in the process of wear of gears. The unit is connected to the machine over the opening on the base of electric motors. Thanks to its robust construction, these devices are suitable for use in the harshest operating conditions, such as steel mills, cement plants, opencast mining.