Zaɓin daidaitattun daidaito namaiko don aikace-aikaceyana da mahimmanci, kamar yadda mai mai laushi mai laushi zai iya yin ƙaura daga wurin da ake buƙatar man shafawa, yayin da mai mai da yawa ba zai iya yin ƙaura da kyau zuwa wuraren da ake buƙatar mai ba.
A al'adance, ana nuna taurin mai ta hanyar ƙimar shigarsa kuma ana ƙididdige shi ta amfani da daidaitaccen ma'auni na ma'auni na Cibiyar Lubricating Grease Institute (NLGI).Lambar NLGI ma'auni ne na daidaiton mai kamar yadda aka nuna ta ƙimar shigar aikin sa.
Thegwajin shigar cikiauna yadda zurfin madaidaicin mazugi ya faɗi cikin samfurin maiko a cikin goma na millimeters.Kowane maki NLGI yayi daidai da takamaiman kewayon ƙimar shigar shigar aiki.Ƙimar shiga mafi girma, kamar waɗanda suka haura 355, suna nuna ƙaramin darajar NLGI.Ma'auni na NLGI ya tashi daga 000 (ruwan ruwa na rabin-ruwa) zuwa 6 (tsakiyar toshe kamar yada cuku cheddar).
Dankin mai tushe da adadin kauri yana tasiri sosai akan darajar NLGI na man mai da aka gama.Masu kauri a cikin maiko suna aiki kamar soso, suna sakin ruwan mai mai (mai tushe da mai.ƙari) idan aka yi amfani da karfi.
Mafi girman daidaito, mafi juriya da mai shine don sakin ruwa mai mai a ƙarƙashin ƙarfi.Man shafawa tare da ƙarancin daidaito zai saki ruwa mai mai da sauri da sauri.Daidaitaccen man shafawa mai dacewa yana da mahimmanci don tabbatar da cewa an samar da adadin da ya dace na ruwa mai laushi da kuma kiyaye shi a cikin tsarin don dacewa da lubrication.
Makin NLGI 000-0
Man shafawa da suka faɗo ƙarƙashin waɗannan maki ana rarraba su cikin ruwa zuwa kewayon ruwa mai ɗanɗano kuma yakan zama ƙasa da danko fiye da sauran.Wadannan maki na maiko na iya zama da amfani a cikin ruɗewa da aikace-aikace na tsakiya, inda ƙaura maiko ba batun bane.Misali, akwatin gear yana buƙatar maiko a cikin wannan kewayon NLGI don ci gaba da cika mai mai zuwa yankin lamba.
NLGI Maki 1-3
Man shafawa mai darajan NLGI na 1 yana da daidaito kamar man tumatir, inda man shafawa mai NLGI 3 yana da daidaito kamar man shanu.Man shafawa da aka fi amfani da su, kamar waɗanda ake amfani da su a cikin ɗigon mota, za su yi amfani da mai mai wanda ke da darajar NLGI 2, wanda ke da taurin man gyada.Makiyoyi a cikin wannan kewayon na iya aiki a cikin kewayon zafin jiki mafi girma kuma a mafi girman gudu fiye da maki NLGI 000-0.Man shafawa don bearingsyawanci NLGI aji 1,2, ko 3.
Makin NLGI 4-6
Makin NLGI da aka rarraba a cikin kewayon 4-6 suna da daidaito kamar ice cream, fudge ko cukuwar cheddar.Don na'urori masu motsi a cikin babban sauri (mafi girma jujjuyawar 15,000 a minti daya) yakamata a yi la'akari da man shafawa na NLGI 4.Waɗannan na'urori suna fuskantar ƙarin juzu'i da haɓaka zafi, saboda haka ana buƙatar maiko mai tauri mai ƙarfi.Ana iya juyar da man shafawa cikin sauƙi daga kashi yayin da yake jujjuyawa, don haka yana haifar da raguwar raguwa da ƙarancin zafin jiki.Misali, Nye's Rheolube 374C man shafawa ne na NLGI aji 4 da ake amfani da shi a aikace-aikace masu ɗaukar sauri tare da kewayon zafin jiki na -40°C zuwa 150°C.Man shafawa tare da NLGI Grade na 5 ko 6 ba a yawanci amfani da su a aikace-aikace.
Lokacin aikawa: Dec-30-2020