Ballscrews can be also lubricated with grease.

Due to the permanent movement of the nut there is a loss of grease. A re-grease is necessary to replace the quantity lost and also for its renovation to avoid ageing and contamination.

The re-grease periods will be stabilised on each case, depending on rotating speed, working load, environment conditions and assembly position.

Under normal working conditions it is recommended to make the re-grease approximately every 1.000-hours of work or after a 2 years period maximum.

The different classes of grease are classified with the references NLG1 according to DIN 51.878. On the following table are shown some applications.