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1.1 ,These test methods cover four procedures for measuring the consistency of lubricating greases by the penetration of a cone of specified dimensions, mass, and finish. The penetration is measured in tenths of a millimetre.
Note 1: ,The National Lubricating Grease Institute (NLGI)2 classified greases according to their consistency as measured by the worked penetration. The classification system is as follows: NLGI Worked Penetration Range, 000 445 to 475 ,00 400 to 430 , ,0 355 to 385 , ,1 310 to 340 , ,2 265 to 295 , ,3 220 to 250 , ,4 175 to 205 , ,5 130 to 160 , ,6 ,85 to 115
Consistency Number
25 ,°,C (77 ,°,F)