The working environment of carton machinery is humid and high-temperature, and some equipment is also accompanied by impact loads. Therefore, in the selection of lubricants, the main considerations are their anti-emulsification property, water resistance, thermal oxidation stability and load resistance performance. The lubrication points on papermaking machinery are, in principle, all closed. All the bearings in the wet section of the paper machine, from the pulp box to the pressing section, are sealed bearing housings to prevent water from entering and grease from overflowing, thus avoiding cross-contamination. The dry section of the paper machine, due to the relatively high temperature during operation, adopts a central lubrication station to supply lubricating oil to various bearings under pressure for lubrication and heat dissipation. The grease lubrication points at the wet end mostly adopt the method of regular manual inspection and grease injection and replacement. Therefore, the lubrication system usually refers to the central lubrication station of the dry section, all oil supply and transportation pipelines, and oil injection devices.

The lubrication station for the dry section of a paper machine is usually selected from the standard general-purpose model. It is best to choose one with stronger oil filtration capacity and oil temperature control ability. If it has a magnetic filter and constant temperature control, it is even more suitable. The oil delivery volume of the lubrication station is usually calculated based on the heat dissipation requirements of each lubrication point.

The oil supply for each sealed bearing housing in the dry section of the paper machine mostly adopts adjustable oil injectors, which are also known as oil drip valves. They ensure that the oil supplied to the bearings is appropriate and continuous.