Explanation: Actually it's not the head, but each of the short excentric axles (one for each piston rod, see link for picture) which revolve around the geometric central axis. The piston rod ("biela") is mounted on the "puño del cigueñal"
-------------------------------------------------- Note added at 2 hrs (2009-11-01 17:17:33 GMT) --------------------------------------------------
En otras palabras: la biela agarra el puño de cigueñal => the rod grabs the crankpin
-------------------------------------------------- Note added at 2 hrs (2009-11-01 17:18:29 GMT) --------------------------------------------------
Sorry. I just realized I left a space out: it's "crank journal"
Yasutomo Kanazawa Japan Local time: 04:52 Specializes in field Native speaker of: Japanese
Reference comments
11 hrs
Reference: puño del cigueñal
Reference information: puño del cigueñal=muñón del cigueñal= crankpin (on the position of the connecting rod=biela) or crank journal (on the position of the cojinete de bancada=crankshaft main bearing).
The right name in English language will depend on which position of the crankshaft length you are talking about, because in Spanish language both positions are puño del cigueñal or muñón del cigueñal in another countries.
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