溫州鹿城區(qū)龍灣美孚透平油-潤滑脂2號經(jīng)銷It's just a matter of being soft or hard. Numbers 1, 2, and 3 refer to its NKGI grade, which is the penetration index. Grade 2, with a range of 265-295, is the most commonly used. Grade 3, with a range of 220-250, is harder and typically used in applications requiring resistance to water or solid impurity contamination to reduce equipment wear. 2# and 3# should be harder, with more manual application. 2# should be slightly harder, with more machine dispensing, though manual application is also acceptable. There is no difference in performance. 3. According to the NLGI classification, the penetration (needle penetration) of grease ranges from #000 to #6. The higher the number, the harder the grease. #2 is commonly used for lubrication, while #3 is suitable for bearings in motors with heavy loads or vertical installations.