润滑脂俗称黄油,是一种介于液体和固体之间的润滑材料。在常温状态下,能够附着在摩擦表面而不流动,但当温度升高或运动时又会变稀,像液体一样润滑摩擦表面,温度降低或机械运动消失时,又可恢复原有的稠度,因此在农业机械及人们日常生活中得到了广泛的应用。润滑脂通常按稠化剂分为皂基、烃基、有机和无机四大类,目前常用的多为皂基润滑脂。在皂基润滑脂中又以钙基、钠基、钙钠基、锂基最为常用。钙基润滑脂有五个牌号,分别是ZG—1(2、3、4、5);钠基 Grease, commonly known as butter, is a lubricating material between liquid and solid. Under normal temperature, it can adhere to the friction surface without flowing, but when the temperature rises or moves, it will become thinner. As the liquid lubricates the friction surface, when the temperature drops or the mechanical movement disappears, the original consistency can be restored. Therefore, in agricultural machinery and people’s daily life has been widely used. Grease is usually classified as thickener soap base, hydrocarbon, organic and inorganic four categories, the most commonly used soap grease. Grease soap in calcium, sodium, calcium, sodium, lithium is most commonly used. Calcium-based grease has five grades, namely ZG-1 (2,3,4,5); sodium