Standards
In coöperation with ASTM International and SAE International, the NLGI has developed the categorisation of lubricating greases specified in standard ASTM D4950 “standard classification and specification for automotive service greases”, reproduced in standard SAE J310 “automotive lubricating greases”. The NLGI retains jurisdiction over the designation and definition of the categories, which it publishes in its “chassis and wheel bearing service classification system”. The NLGI has also created a symbol, the NLGI Certification Mark, which can be used on containers of greases to advertise their ASTM D4950 category.
The measure of the consistency of a lubricating grease is commonly expressed by its NLGI consistency number, defined by the NLGI in the “standard classification of lubricating grease”. The NLGI consistency number is used in several standards: ASTM D4950, SAE J310 and ISO 6743-9 “lubricants, industrial oils and related products (class L) — classification — part 9: family X (greases)”.
The NLGI also administers a professional certification program. Individuals passing an examination designed to test their knowledge in the field of lubricating grease obtain the Certified Lubricating Grease Specialist (CLGS) certification.
Read more about this topic: National Lubricating Grease Institute
Famous quotes containing the word standards:
“That’s the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (1896–1970)
“As long as our people quote English standards they dwarf their own proportions.”
—Ralph Waldo Emerson (1803–1882)
“A generation which has passed through the shop has absorbed standards and ambitions which are not of those of spaciousness, and cannot get away from them. Everything with them is done as though for sale, and they naturally have in view the greatest possible benefit, profit and that end of the stuff that will make the best show.”
—Alexander Herzen (1812–1870)