ʻO ka hana o ka sila aila ka mea maʻamau e hoʻokaʻawale i nā ʻāpana e pono e lubricated i nā ʻāpana hoʻoili mai ke kaiapuni waho, i ʻole e hoʻokuʻu i ka ʻaila lubricating.ʻO ka iwi iwi e like me nā kaola kila i loko o ka lālā paʻa, e hana ana i mea hoʻoikaika a hiki i ka sila aila ke mālama i kona ʻano a me ka ʻeha.Wahi a ka hoʻolālā, hiki ke hoʻokaʻawale ʻia i hoʻokahi lehelehe skeleton oil seal a me ka lehelehe ʻelua lehelehe aila.ʻO ka lehelehe kōkua o ka lehelehe ʻelua lehelehe aila sila e pāʻani i ka lepo-hōʻoia e pale i ka lepo o waho a me nā haumia mai ke komo ʻana i ka mīkini.E like me ke ʻano o ka iwi, hiki ke hoʻokaʻawale ʻia i loko o ka ʻili aila ʻili i loko, hōʻike ʻia ke sila aila hui a hui pū ʻia.Wahi a nā kūlana hana, hiki ke hoʻokaʻawale ʻia i loko o ka rotary skeleton oil seal a me ka reciprocating skeleton oil seal.No nā ʻenekini ʻenekini crankshafts, nā ʻenekini diesel crankshafts, nā pahu pahu, nā ʻokoʻa, nā mea haʻalulu, nā ʻenekini, nā axles a me nā ʻāpana ʻē aʻe.