Ukukhetha ukuhambelana okufanelekileyo kweigrisi kwisiceloKubaluleke kakhulu, njengoko igrisi ethambileyo kakhulu inokufuduka isuke kwindawo efuna ukuthanjiswa, ngelixa igrisi eqine kakhulu isenokungakwazi ukufudukela kwiindawo ezifuna ukuthanjiswa.

Ngokwemveli, ukuqina kwegrisi kuboniswa ngexabiso lokungena kwaye kuvandlakanywa kusetyenziswa itshathi yebakala leNational Lubricating Grease Institute (NLGI).Inombolo ye-NLGI ngumlinganiselo wokungqinelana kwegrisi njengoko kubonisiwe lixabiso layo elisetyenzisiweyo lokungena.

Iuvavanyo lokungenailinganisa ukuba ubunzulu kangakanani ikhowuni esemgangathweni iwela kwisampulu yegrizi kwishumi leemilimitha.Ibakala ngalinye le-NLGI lihambelana noluhlu lwexabiso lokungena olusetyenzisiweyo.Amaxabiso okungena aphezulu, afana nalawo angaphezulu kwama-355, abonisa inani elisezantsi lebakala le-NLGI.Isikali se-NLGI sisuka kwi-000 (semi-fluid) ukuya kwi-6 (ibhloko eqinileyo efana ne-cheddar cheese spread).

Isiseko se-oyile viscosity kunye nomthamo we-thickener ichaphazela kakhulu ibakala le-NLGI yegrisi yokuthambisa egqityiweyo.I-thickeners ekusebenzeni kwegrisi njengesipontshi, ikhupha i-lubricating fluid (i-oyile yesiseko kunyeizongezo) xa kunyanzeliswa.

Okukhona iphezulu ukungaguquguquki, kokukhona imelana negrisi kukukhupha ulwelo lokuthambisa phantsi kwamandla.Igrisi enokungaguquguquki okuphantsi iya kukhulula ulwelo lokuthambisa lula ngakumbi.Ukulungelelaniswa kwegrisi okufanelekileyo kubalulekile ekuqinisekiseni ukuba ubungakanani obufanelekileyo be-lubricating fluid bunikezelwa kwaye bugcinwe kwisistim sokuthambisa ngokufanelekileyo. 

NLGI Amabanga 000-0

Iigrisi eziwela phantsi kwala mabakala zihlelwa kulwelo ukuya kuluhlu lwesiqingatha solwelo kwaye zithande ukuba neviscous encinci kunezinye.La mabanga egrisi anokuba luncedo kwizicelo ezivaliweyo kunye neziphakathi, apho ukufuduka kwegrisi kungeyongxaki.Umzekelo, ibhokisi yegiya ifuna igrisi ngaphakathi kolu luhlu lwe-NLGI ngokuqhubekayo ukuzalisa i-lubricant kwindawo yoqhagamshelwano.

NLGI Amabanga 1-3

Igrisi enebakala le-NLGI le-1 inokuhambelana okufana ne-tomato paste, apho igrisi ene-NLGI yebanga lesi-3 inokuhambelana ngakumbi njengebhotela.Awona mafutha asetyenziswa ngokuqhelekileyo, afana nalawo asetyenziswa kwiibheringi zeemoto, angasebenzisa i-lubricant eyi-NLGI yebanga lesi-2, enokuqina kwebhotela ye-peanut.Amabanga ngaphakathi kolu luhlu angasebenza kwiqondo lokushisa eliphezulu kunye nesantya esiphezulu kune-NLGI amabakala 000-0.Iigrisi zeebheringingokuqhelekileyo iNLGI ibakala 1, 2, okanye 3.

NLGI Amabanga 4-6

Amabakala e-NLGI ahlelwe kuluhlu lwe-4-6 anokuhambelana okufana ne-ayisikrimu, i-fudge okanye i-cheddar cheese.Kwizixhobo ezihamba ngesantya esiphezulu (ngaphezu kwe-15,000 yokujikeleza ngomzuzu) kufuneka kuthathelwe ingqalelo igrisi ye-NLGI yebakala lesi-4.Ezi zixhobo ziba nokukhuhlana okuthe chatha kunye nokwanda kobushushu, ngoko ke kufuneka igrisi eqinile, ehambisa umjelo.Igrisi ezitshayelisiweyo zityhalwa ngokulula kude neelementi njengoko ijikeleza, oko kukhokelela ekunyakazelekeni okuncinci kunye nokuzuza okuncinci kobushushu.Umzekelo, iNye's Rheolube 374C yigrisi yeNLGI yebakala lesi-4 esetyenziswa kwizicelo ezithwala isantya esiphezulu ezinoluhlu olubanzi lobushushu obuphakathi kwe -40°C ukuya kwi-150°C.Iigrisi ezineNLGI yeBanga lesi-5 okanye lesi-6 azidli ngokusetyenziswa kwizicelo.