Hatimin injina na'urar hatimin injina ce mai juyawa, tana nufin aƙalla biyu a tsaye zuwa ga axis na juyawar saman ƙarshe a cikin matsin ruwa da kuma diyya ga rawar da nama ke takawa (ko maganadisu) da haɗin gwiwar hatimin taimako, don kiyaye manna da zamewar dangi kuma ya zama kayan aiki don guje wa zubewar ruwa. Babban aikin hatimin injina shine hana zubewar iskar gas da ruwa a aikace-aikacen shaft mai juyawa. Ana amfani da shi sosai a cikin ƙayyadaddun hatimin injina don famfo, mai tayar da hankali, mai damfara da sauran kayan aiki makamancin haka,Hatimin injina na yau da kullunyawanci ana raba shi zuwa hatimin injiniya na bangaren kumaharsashi na inji hatimia cikin hanyar haɗawa. Kuma hatimin shaft na injiniya na ɓangaren kuma za a iya raba shi zuwa:hatimin injina guda ɗaya na bazara,raƙuman ruwa na spring na inji hatimi, Elastomer bellow inji hatimi ,hatimin injina na ƙarfeDa sauransu. Za mu iya samar da nau'ikan hatimin injiniya iri-iri iri-iri na shahararrun kamfanoni kamar Eagle burgmann, AES, John crane da Vulcan.
