The butter lubrication system can be distinguished by the viscosity of butter, with the unit being NLGI. The viscosity range of butter ranges from the highest NLGI NO.1-6 to NLGI NO.000, 00, and 0. However, the viscosity range of butter commonly used as a lubrication system is mostly NLGI grades 0 to 2.
The higher the viscosity and hardness of solid butter, the higher the technical level required for lubrication systems, such as pressure and pushing method. Therefore, there are currently few types of lubrication systems that can use solid butter.
The butter lubrication system is distinguished by its actuation method and can also be divided into various methods such as manual, electric, and pneumatic