Makina a carbon seal ali ndi mbiri yakale. Graphite ndi isoform ya element carbon. Mu 1971, United States anaphunzira bwino kusintha graphite kusindikiza zakuthupi, amene anathetsa kutayikira atomiki mphamvu valavu. Pambuyo pokonza kwambiri, graphite yosinthika imakhala chinthu chabwino kwambiri chosindikizira, chomwe chimapangidwa kukhala zisindikizo zosiyanasiyana zamakina a carbon ndi zotsatira za kusindikiza zigawo. Zisindikizo za carbon mechanical izi zimagwiritsidwa ntchito m'mafakitale a mankhwala, mafuta, magetsi, monga kutentha kwamadzimadzi.
Chifukwa graphite kusintha aumbike ndi kukula kwa kukodzedwa graphite pambuyo kutentha, kuchuluka kwa intercalating wothandizira otsala mu graphite kusinthasintha ndi laling'ono kwambiri, koma osati kwathunthu, kotero kukhalapo ndi zikuchokera intercalation wothandizila ndi chikoka chachikulu pa khalidwe. ndi kachitidwe ka mankhwala.
