LDO Documentation: https://docs.ldomotors.com/guides/rail_grease_guide

Linear Rail Carriage Ball Size: (Diameter) .
MGN7 1.5mm
MGN9 2.0mm
MGN12 2.387mm
MGN15 2.778mm
MGN20 3.0mm

Note: Ensure you clean the rails before use and grease well and regular re-grease to ensure longevity of the carriage, especially for higher pre-load rails such as Z1.

Community Guide by fenhelix#0242