Nlgi classification method of grease consistency

Time：04.07.2024

Nlgi is abbreviated: National Lubricating Grease Institute refers to the national lubricating grease Research Institute [U.S.] it is an indicator to judge the soft hardness of lubricating grease. It measures the soft hardness of lubricating grease with the distance of penetration (ASTM d218) Its number is 000,00,0,1,2,3,4,5,6. The lower the number is, the softer the fat is, and the higher the number is, the harder the fat is. Generally, the number commonly used in industry is nlgi No.2 or nlgi No.3, while 0 and 1 are commonly used in central oil supply grease pumps. Usually, the choice of number is judged according to the operating environment and the way of oil supply

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