Ịhọrọ ezi agbanwe agbanwe nkegriiz maka ngwadị oke egwu, dị ka griiz nke dị nro nwere ike ịkwaga n'ebe ahụ dị mkpa ka a na-ete mmanụ, ebe griiz nke siri ike nwere ike ọ gaghị abanye n'ụzọ dị irè n'ime ebe ndị a chọrọ mmanu mmanu.

Na omenala, a na-egosipụta isi ike griiz site na uru ntinye ya ma na-enyocha ya site na iji chaatị ọkwa ọkwa National Lubricating Grease Institute (NLGI).Nọmba NLGI bụ ihe nrịbama nke griiz na-agbanwe agbanwe dịka uru ntinye ya na-arụ ọrụ gosiri.

Nkeule ntinyena-atụ ka omimi nke cone ọkọlọtọ si adaba na nlele griiz n'ime ụzọ iri nke millimeters.Ọkwa NLGI ọ bụla dabara na oke uru ntinye ọrụ arụrụ arụ.Ụkpụrụ ntinye dị elu, dị ka ndị gafere 355, na-egosi akara akara NLGI dị ala.Ọnụ ọgụgụ NLGI sitere na 000 (ọkara mmiri mmiri) ruo 6 (ihe mgbochi siri ike dị ka cheese cheddar gbasaa).

Isi viscosity mmanụ na ọnụ ọgụgụ nke thickener na-emetụta ọkwa NLGI nke griiz mmanu emechara.Ihe ndị na-esi na griiz na-arụ ọrụ dị ka sponge, na-ahapụ mmiri na-egbuke egbuke (mmanụ isi naihe mgbakwunye) mgbe etinyere ike.

Ka ịdị elu na-agbanwe agbanwe, ka griiz na-esiwanye ike bụ ịhapụ mmiri na-ekpo ọkụ n'okpuru ike.Otu griiz na-adịghị agbanwe agbanwe ga-ahapụ mmiri na-ete mmanụ ngwa ngwa.Achịcha griiz kwesịrị ekwesị dị mkpa maka ijide n'aka na a na-enye ọnụ ọgụgụ dị mma nke mmiri na-ekpo ọkụ ma na-echekwa ya na usoro maka mmanye mmanye kwesịrị ekwesị. 

NLGI akara ule 000-0

A na-ekewa griiz ndị na-ada n'okpuru akara ule ndị a n'ime mmiri mmiri ruo ọkara mmiri mmiri ma na-adịkarị obere viscous karịa ndị ọzọ.Ụdị griiz ndị a nwere ike ịba uru na ngwa emechi na nke etiti, ebe mbugharị griiz abụghị nsogbu.Dịka ọmụmaatụ, igbe gia chọrọ griiz n'ime oke NLGI a ka ọ na-aga n'ihu na-ejuputa mmanu na mpaghara kọntaktị.

NLGI Nkeji 1-3

Otu griiz nwere ọkwa NLGI nke 1 nwere ngbanwe dị ka tapawa tomato, ebe griiz nwere ọkwa NLGI nke 3 nwere ngbanwe dị ka bọta.Mmanụ griiz ndị a na-ejikarị eme ihe, dị ka nke a na-eji na-agbagharị ụgbọ ala, ga-eji mmanụ mmanu nke bụ ọkwa NLGI 2, nke nwere isi ike nke mmiri ara ehi ahụekere.Ọkwa dị n'ime oke a nwere ike ịrụ ọrụ na oke okpomọkụ yana ọsọ dị elu karịa akara NLGI 000-0.Greases maka bearingsna-abụkarị NLGI ọkwa 1,2, ma ọ bụ 3.

NLGI Nkeji 4-6

Akara NLGI nke ewepụtara na 4-6 nwere ngbanwe dị ka ice cream, fudge ma ọ bụ chiiz cheddar.Maka ngwaọrụ na-akpụ akpụ na oke ọsọ (karịa ntụgharị 15,000 kwa nkeji) ekwesịrị ịtụle griiz NLGI 4.Ngwa ndị a na-enwekwu esemokwu na ọkụ ọkụ, ya mere ọ dị mkpa ka griiz na-agbapụta siri ike.A na-ebupụ griiz chanel na ngwa ngwa site na mmewere ahụ ka ọ na-atụgharị, si otú a na-eduga n'ịba ụba na ntanye okpomọkụ.Dịka ọmụmaatụ, Nye's Rheolube 374C bụ griiz grade 4 NLGI eji na ngwa na-ebu oke ọsọ yana oke okpomọkụ nke -40°C ruo 150°C.A naghị eji griiz nwere akara NLGI nke 5 ma ọ bụ 6 na ngwa.